©2000 Prentice H

all Inc.

Figure 7.22 Basic B

JT differentiialamplifier.

©2000 Prentice H

all Inc.

©2000 Prentice H

all Inc.

©2000 Prentice H

all Inc.

Figure 7.23a Basic B

JT differential amplifier w

ith waveform

s.

©2000 Prentice H

all Inc.

Figure 7.23b Basic B

JT differential amplifier w

ith waveform

s.

©2000 Prentice H

all Inc.

Figure 7.24 pnpem

itter-coupled pair.

©2000 Prentice H

all Inc.

Figure 7.25 Collector currents versus differential input voltage.

©2000 Prentice H

all Inc.

Figure 7.26 Voltage transfer characteristic of the B

JT differential amplifier.

©2000 Prentice H

all Inc.

Figure 7.27 Differential am

plifier with em

itter degeneration resistors.

©2000 Prentice H

all Inc.

Figure 7.28 Voltage transfer characteristic w

ith emitter degeneration resistors. R

EF = 40(VT /IEE ).

©2000 Prentice H

all Inc.

Figure 7.29 Either a balanced or single-ended output is available\break from the differential am

plifier.

©2000 Prentice H

all Inc.

Figure 7.31 Answ

ers for Exercise 7.10.

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all Inc.

Figure 7.32 Answ

ers for Exercise 7.11.

©2000 Prentice H

all Inc.

Figure 7.33 Small-signal equivalent circuit for the

differential amplifier of Figure 7.27. (R

EB is the output impedance of the current source IEE .)

©2000 Prentice H

all Inc.

Figure 7.34 Half-circuit for a differential input signal.

©2000 Prentice H

all Inc.

Figure 7.35 Small-signal equivalent circuit w

ith a pure comm

on-mode input signal.

©2000 Prentice H

all Inc.

Figure 7.36 Half-circuit for a pure com

mon-m

ode input signal.

©2000 Prentice H

all Inc.

Figure 7.30 Emitter-coupled pair w

ith current-mirror load.

©2000 Prentice H

all Inc.

Figure 7.37 Emitter-coupled pair of Exercise 7.13.

©2000 Prentice H

all Inc.

Figure 7.39 First attempt in Exam

ple 7.4.

©2000 Prentice H

all Inc.

Figure 7.40 Differential am

plifier of Example7.4 using the W

ilson current source.

©2000 Prentice H

all Inc.

Figure 7.41 Differential am

plifier of Example 7.4.

©2000 Prentice H

all Inc.

Figure 7.42a Waveform

s for the differential amplifier of Exam

ple 7.4.

©2000 Prentice H

all Inc.

Figure 7.42b Waveform

s for the differential amplifier of Exam

ple 7.4.

©2000 Prentice H

all Inc.

Figure 7.42c Waveform

s for the differential amplifier of Exam

ple 7.4.

©2000 Prentice H

all Inc.

Figure 7.43 Source-coupled differential amplifier.

©2000 Prentice H

all Inc.

Figure 7.44 Drain currents versus norm

alized input voltage.

©2000 Prentice H

all Inc.

Figure 7.45 Differential output voltage versus norm

alized input voltage.

©2000 Prentice H

all Inc.

Figure 7.46 Small-signal equivalent circuit for the source-coupled am

plifier of Figure 7.43.(N

ote:R

SB is the output resistance of the bias current source I.)

©2000 Prentice H

all Inc.

Figure 7.47 Source-coupled differential pair of Example 7.5.

©2000 Prentice H

all Inc.

Figure 7.48 Differential and com

mon-m

ode voltage gains versus frequency for the circuit of Example 7.5.

©2000 Prentice H

all Inc.

Figure 7.49 CM

OS op am

p.

©2000 Prentice H

all Inc.

Figure 7.50 Small-signal equivalent circuit for the output stage consisting of M

7 and M2 .