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TRANSCRIPT
CLOSED-LOOP BW
= fCL
B
A
VN, R1R1
R3
4kTR3
4kTR1
VN, R3IN+
IN–
VN
4kTR2
VN, R2R2
NOISE GAIN =
GAIN FROM“A” TO OUTPUT
=
NG = 1 +R2
R1
VOUT
GAIN FROM“B” TO OUTPUT
= –R2
R1
RTI NOISE = BW ×
VN2 + 4kTR3 + 4kTR1
R2
R1 + R2
2
+ IN+2 R32 + IN–
2 R1 × R2R1 + R2
2
+ 4kTR2R1
R1 + R2
2
RTO NOISE = NG × RTI NOISERTI = RTO =
BW = 1.57 fCL
GAIN(dB)
6dB/OCTAVEROLL-OFF
LOOPGAIN
OPEN-LOOP GAIN
CLOSED-LOOP GAIN
NOISEGAIN
CLOSED-LOOP BANDWITH
LOG FREQUENCY
RESISTANCE (�)
10,000
1000
10
1
010 1k 100k 10M100 10k 1M 100M
100en at 25°C
nV
Hz
:
VR =
k = (1.38 × 10–23 J/K)
T =
R = (Ohms)
B = (Hz)
= 4kTRBVR
25°C 4kT = 1.65 × 10–20 W/Hz VR = 1.65 × 10–20RB
CLOSED-LOOP BW
= fCL
B
A
VN, R1R1
R3
4kTR3
4kTR1
VN, R3IN+
IN–
VN
4kTR2
VN, R2R2
NOISE GAIN =
GAIN FROM“A” TO OUTPUT
=
NG = 1 +R2
R1
VOUT
GAIN FROM“B” TO OUTPUT
= –R2
R1
RTI NOISE = BW ×
VN2 + 4kTR3 + 4kTR1
R2
R1 + R2
2
+ IN+2 R32 + IN–
2 R1 × R2R1 + R2
2
+ 4kTR2R1
R1 + R2
2
RTO NOISE = NG × RTI NOISERTI = RTO =
BW = 1.57 fCL
GAIN(dB)
6dB/OCTAVEROLL-OFF
LOOPGAIN
OPEN-LOOP GAIN
CLOSED-LOOP GAIN
NOISEGAIN
CLOSED-LOOP BANDWITH
LOG FREQUENCY
RESISTANCE (�)
10,000
1000
10
1
010 1k 100k 10M100 10k 1M 100M
100en at 25°C
nV
Hz
:
VR =
k = (1.38 × 10–23 J/K)
T =
R = (Ohms)
B = (Hz)
= 4kTRBVR
25°C 4kT = 1.65 × 10–20 W/Hz VR = 1.65 × 10–20RB
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
常用电容值
pF pF pF pF µF µF µF µF µF µF µF1.0 10 100 1000 0.01 0.1 1.0 10 100 1000 10,0001.1 11 110 11001.2 12 120 12001.3 13 130 13001.5 15 150 1500 0.015 0.15 1.5 15 150 15001.6 16 160 16001.8 18 180 18002.0 20 200 20002.2 22 220 2200 0.022 0.22 2.2 22 220 22002.4 24 240 24002.7 27 270 27003.0 30 300 30003.3 33 330 3300 0.033 0.33 3.3 33 330 33003.6 36 360 36003.9 39 390 39004.3 43 430 43004.7 47 470 4700 0.047 0.47 4.7 47 470 47005.1 51 510 51005.6 56 560 56006.2 62 620 62006.8 68 680 6800 0.068 0.68 6.8 68 680 68007.5 75 750 75008.2 82 820 82009.1 91 910 9100
助您节省时间的放大器设计参考指南
CLOSED-LOOP BW
= fCL
B
A
VN, R1R1
R3
4kTR3
4kTR1
VN, R3IN+
IN–
VN
4kTR2
VN, R2R2
NOISE GAIN =
GAIN FROM“A” TO OUTPUT
=
NG = 1 +R2
R1
VOUT
GAIN FROM“B” TO OUTPUT
= –R2
R1
RTI NOISE = BW ×
VN2 + 4kTR3 + 4kTR1
R2
R1 + R2
2
+ IN+2 R32 + IN–
2 R1 × R2R1 + R2
2
+ 4kTR2R1
R1 + R2
2
RTO NOISE = NG × RTI NOISERTI = RTO =
BW = 1.57 fCL
GAIN(dB)
6dB/OCTAVEROLL-OFF
LOOPGAIN
OPEN-LOOP GAIN
CLOSED-LOOP GAIN
NOISEGAIN
CLOSED-LOOP BANDWITH
LOG FREQUENCY
RESISTANCE (�)
10,000
1000
10
1
010 1k 100k 10M100 10k 1M 100M
100en at 25°C
nV
Hz
:
VR =
k = (1.38 × 10–23 J/K)
T =
R = (Ohms)
B = (Hz)
= 4kTRBVR
25°C 4kT = 1.65 × 10–20 W/Hz VR = 1.65 × 10–20RB
CLOSED-LOOP BW
= fCL
B
A
VN, R1R1
R3
4kTR3
4kTR1
VN, R3IN+
IN–
VN
4kTR2
VN, R2R2
NOISE GAIN =
GAIN FROM“A” TO OUTPUT
=
NG = 1 +R2
R1
VOUT
GAIN FROM“B” TO OUTPUT
= –R2
R1
RTI NOISE = BW ×
VN2 + 4kTR3 + 4kTR1
R2
R1 + R2
2
+ IN+2 R32 + IN–
2 R1 × R2R1 + R2
2
+ 4kTR2R1
R1 + R2
2
RTO NOISE = NG × RTI NOISERTI = RTO =
BW = 1.57 fCL
GAIN(dB)
6dB/OCTAVEROLL-OFF
LOOPGAIN
OPEN-LOOP GAIN
CLOSED-LOOP GAIN
NOISEGAIN
CLOSED-LOOP BANDWITH
LOG FREQUENCY
RESISTANCE (�)
10,000
1000
10
1
010 1k 100k 10M100 10k 1M 100M
100en at 25°C
nV
Hz
:
VR =
k = (1.38 × 10–23 J/K)
T =
R = (Ohms)
B = (Hz)
= 4kTRBVR
25°C 4kT = 1.65 × 10–20 W/Hz VR = 1.65 × 10–20RB
CLOSED-LOOP BW
= fCL
B
A
VN, R1R1
R3
4kTR3
4kTR1
VN, R3IN+
IN–
VN
4kTR2
VN, R2R2
NOISE GAIN =
GAIN FROM“A” TO OUTPUT
=
NG = 1 +R2
R1
VOUT
GAIN FROM“B” TO OUTPUT
= –R2
R1
RTI NOISE = BW ×
VN2 + 4kTR3 + 4kTR1
R2
R1 + R2
2
+ IN+2 R32 + IN–
2 R1 × R2R1 + R2
2
+ 4kTR2R1
R1 + R2
2
RTO NOISE = NG × RTI NOISERTI = RTO =
BW = 1.57 fCL
GAIN(dB)
6dB/OCTAVEROLL-OFF
LOOPGAIN
OPEN-LOOP GAIN
CLOSED-LOOP GAIN
NOISEGAIN
CLOSED-LOOP BANDWITH
LOG FREQUENCY
RESISTANCE (�)
10,000
1000
10
1
010 1k 100k 10M100 10k 1M 100M
100en at 25°C
nV
Hz
:
VR =
k = (1.38 × 10–23 J/K)
T =
R = (Ohms)
B = (Hz)
= 4kTRBVR
25°C 4kT = 1.65 × 10–20 W/Hz VR = 1.65 × 10–20RB
CLOSED-LOOP BW
= fCL
B
A
VN, R1R1
R3
4kTR3
4kTR1
VN, R3IN+
IN–
VN
4kTR2
VN, R2R2
NOISE GAIN =
GAIN FROM“A” TO OUTPUT
=
NG = 1 +R2
R1
VOUT
GAIN FROM“B” TO OUTPUT
= –R2
R1
RTI NOISE = BW ×
VN2 + 4kTR3 + 4kTR1
R2
R1 + R2
2
+ IN+2 R32 + IN–
2 R1 × R2R1 + R2
2
+ 4kTR2R1
R1 + R2
2
RTO NOISE = NG × RTI NOISERTI = RTO =
BW = 1.57 fCL
GAIN(dB)
6dB/OCTAVEROLL-OFF
LOOPGAIN
OPEN-LOOP GAIN
CLOSED-LOOP GAIN
NOISEGAIN
CLOSED-LOOP BANDWITH
LOG FREQUENCY
RESISTANCE (�)
10,000
1000
10
1
010 1k 100k 10M100 10k 1M 100M
100en at 25°C
nV
Hz
:
VR =
k = (1.38 × 10–23 J/K)
T =
R = (Ohms)
B = (Hz)
= 4kTRBVR
25°C 4kT = 1.65 × 10–20 W/Hz VR = 1.65 × 10–20RB
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
√P
(dB) ( )
db = 10 Log = 20 Log
= 20 Log (Gain)
POUT
PIN
IOUT
IIN
VOUT
VIN
db = 10 Log = 20 Log
= 20 Log (Gain)
PIN
POUT
IINIOUT
VIN
VOUT
( )
RMS = = VRMS = 0.707 VPEAK VAVE. = 0.637 VPEAK VPEAK = 1.414 VEFF. VEFF. = 1.11 VAVE. VPEAK = 1.57 VAVE. VAVE. = 0.9 VEFF.
( )
RTOTAL = R1 + R2 + R3 + …
= = =NP
NS
EP
ES
ISIP
ZP
ZS
1 + 1 + 1 + …R1 R2 R3
1RTOTAL =
R1+R2
R1 R2RTOTAL =
RNN
RRTOTAL =
VI
IR
√PR
IP
I2P P
V2
IV
R
VP
RV
RV2
I2R
B.W.SR.
(Tuned Circuit)
Q =
Q & Resonant Frequency Formulas
RXL Figure of Merit
of a CoilQ =
SR = or Hz2π√LC
1
√LC
.159
L =4π2 SR
2 C
1C =
4π2 SR2 L
1
XC =
XL = 2π fL
2π fC
1
( )
Z = √R2 + XL2 (RL )
Z = √R2 + XC2 (RC )
Z = XL – XC (LC )
Z = √R2 + (XL – XC)2 (RLC )
Z = VA I
( )
Z = RXL (RL) Z =
VA √R2 + XL
2 ILINE
Z = RXC (RC) VA = VL = VC = VR √R2 + XC
2
Z = XL XC (LC) VA = ILINEZ XL – XC
Z = RX (RLC) √R2 + X2
P I
V R
www.analog.com/zh/amplifiers
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
©2011 Analog Devices, Inc. All rights reserved. P10040-7.5-6/11
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
LOAD
GND
VS
VREF1
VREF2
+IN
–IN
IS RS
VSUPPLY
GAIN FIXED VALUE AS SPECIFIED ON DATA SHEET
RS VSUPPLY
DEMOD
SIGNAL
FB
IN–
IN+
IN COM
VSIG
5V FS
HI
LO
VOUT5VFS
MOD
ISOLATE VSIG SIGNAL FROM VOUTVISO UP TO 3500V
VOUT = VIN
PWRA
PRAO VGAI
VNEG VPOS VCOM GPOS GNEG
PrA
GAIN CONTROLINTERFACE
ATTENUATOR
BIAS
RFBH
RFBL
VINVOUTVIN
GAIN (dB) = 20log RFBH + 1 RFBL
+ 50dB GPOS – GNEG + 16.5dB V
1 10000dB 60dB VGAIN
LOAD
GND
VS
VREF1
VREF2
+IN
–IN
IS RS
VSUPPLY
GAIN FIXED VALUE AS SPECIFIED ON DATA SHEET
RS VSUPPLY
DEMOD
SIGNAL
FB
IN–
IN+
IN COM
VSIG
5V FS
HI
LO
VOUT5VFS
MOD
ISOLATE VSIG SIGNAL FROM VOUTVISO UP TO 3500V
VOUT = VIN
PWRA
PRAO VGAI
VNEG VPOS VCOM GPOS GNEG
PrA
GAIN CONTROLINTERFACE
ATTENUATOR
BIAS
RFBH
RFBL
VINVOUTVIN
GAIN (dB) = 20log RFBH + 1 RFBL
+ 50dB GPOS – GNEG + 16.5dB V
1 10000dB 60dB VGAIN
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
VOUT = VIN
VOUTVIN
VIN
RG RF
VOUT
VA
VBR1
R1
R2
VOUT
R2
VCM
ADC
RF
RF
RG
RG
VOUT
VOUTdiff = RF VIN
RG
VOUT
VOCM
–VIN
+VIN
VREF
OUT
10k�
10k�
24.7k�
10k�
10k�
RGVCM
VOUT = 1 + 2 × 24.7k� VIN + VREF RG
VIN
VOUT
R1
C
RF
t = RC = RFC
VOUT = VIN
–RF × 1
R1 RFCS + 1
CIN
RIN
VOUTVIN
VIN
RF
VOUT = VIN
–RF × RINCS
RIN RINCS + 1
VA
VC
VBVOUT
R1
R2
R3
RF
VN
RN
VOUTRG
R1'
R1
R2'
R2
R3'+
+
+
VOUT = VSIG 1 +2R1RG
R3R2
IF R2 = R3, G = 1 +2R1RG
~~
~~
~~
VCM
+
+
VSIG2
VSIG2
A1
A2
A3
×
LOAD
GND
VS
VREF1
VREF2
+IN
–IN
IS RS
VSUPPLY
GAIN FIXED VALUE AS SPECIFIED ON DATA SHEET
RS VSUPPLY
DEMOD
SIGNAL
FB
IN–
IN+
IN COM
VSIG
5V FS
HI
LO
VOUT5VFS
MOD
ISOLATE VSIG SIGNAL FROM VOUTVISO UP TO 3500V
VOUT = VIN
PWRA
PRAO VGAI
VNEG VPOS VCOM GPOS GNEG
PrA
GAIN CONTROLINTERFACE
ATTENUATOR
BIAS
RFBH
RFBL
VINVOUTVIN
GAIN (dB) = 20log RFBH + 1 RFBL
+ 50dB GPOS – GNEG + 16.5dB V
1 10000dB 60dB VGAIN
LOAD
GND
VS
VREF1
VREF2
+IN
–IN
IS RS
VSUPPLY
GAIN FIXED VALUE AS SPECIFIED ON DATA SHEET
RS VSUPPLY
DEMOD
SIGNAL
FB
IN–
IN+
IN COM
VSIG
5V FS
HI
LO
VOUT5VFS
MOD
ISOLATE VSIG SIGNAL FROM VOUTVISO UP TO 3500V
VOUT = VIN
PWRA
PRAO VGAI
VNEG VPOS VCOM GPOS GNEG
PrA
GAIN CONTROLINTERFACE
ATTENUATOR
BIAS
RFBH
RFBL
VINVOUTVIN
GAIN (dB) = 20log RFBH + 1 RFBL
+ 50dB GPOS – GNEG + 16.5dB V
1 10000dB 60dB VGAIN
LOAD
GND
VS
VREF1
VREF2
+IN
–IN
IS RS
VSUPPLY
GAIN FIXED VALUE AS SPECIFIED ON DATA SHEET
RS VSUPPLY
DEMOD
SIGNAL
FB
IN–
IN+
IN COM
VSIG
5V FS
HI
LO
VOUT5VFS
MOD
ISOLATE VSIG SIGNAL FROM VOUTVISO UP TO 3500V
VOUT = VIN
PWRA
PRAO VGAI
VNEG VPOS VCOM GPOS GNEG
PrA
GAIN CONTROLINTERFACE
ATTENUATOR
BIAS
RFBH
RFBL
VINVOUTVIN
GAIN (dB) = 20log RFBH + 1 RFBL
+ 50dB GPOS – GNEG + 16.5dB V
1 10000dB 60dB VGAIN
1%精度的电阻阻值范围为10.0到1.00M(另也有1.10 M、1.20 M、1.30 M、1.50 M、1.60 M、1.80 M、2.00 M和2.20 M)。
下表列出了最常用容差(1%)的标准基本电阻值，以及可用的典型阻值范围。要确定基本值以外的其它电阻值，请将其乘以10、100、1000或 10,000。
常用1%电阻值
10.0 10.2 10.5 10.7 11.0 11.3 11.5 11.8 12.1 12.4 12.7 13.013.3 13.7 14.0 14.3 14.7 15.0 15.4 15.8 16.2 16.5 16.9 17.417.8 18.2 18.7 19.1 19.6 20.0 20.5 21.0 21.5 22.1 22.6 23.223.7 24.3 24.9 25.5 26.1 26.7 27.4 29.0 28.7 29.4 30.1 30.931.6 32.4 33.2 34.0 34.8 35.7 36.5 37.4 38.3 39.2 40.2 41.242.2 43.2 44.2 45.3 46.4 47.5 48.7 49.9 51.1 52.3 53.6 54.956.2 57.6 59.0 60.4 61.9 63.4 64.9 66.5 68.1 69.8 71.5 73.275.0 76.8 78.7 80.6 82.5 84.5 86.6 88.7 90.9 93.1 95.3 97.6