Sample Problems for Rectifiers and Filters:

Example #1: A 5:1 transformer is connected to a half

Find (a) Vp; (b)Ip; (c) Idc; (d) Iac. Input voltage is 220V

Example #2: Assuming the diode in the circuit is ideal, sketch V

wave rectifier using the 6.8kΩ as the load.

Example#3: Calculate the peak current and show the output waveform for a full

tapped rectifier with an input voltage of 10V

diode is 20Ω. Use Vf = 0.7V. Transformer turns ratio is 4:1.

Sample Problems for Rectifiers and Filters:

A 5:1 transformer is connected to a half-wave rectifier circuit with a 50k

. Input voltage is 220Vpk.

Assuming the diode in the circuit is ideal, sketch Vin, VD, ID, VL and I

Ω as the load.

Calculate the peak current and show the output waveform for a full

tapped rectifier with an input voltage of 10Vpk and a load of 1kΩ. The internal resistance of the

= 0.7V. Transformer turns ratio is 4:1.

wave rectifier circuit with a 50kΩ load.

and IL for the half-

Calculate the peak current and show the output waveform for a full-wave center-

Ω. The internal resistance of the

Example#4: A bridge-type rectifier with an input voltage of 220V

of 5:1 is terminated with a load R

Example#5: Draw the output voltage of the bridge rectifier shown. Notice that all diodes are

reversed from previous circuits.

type rectifier with an input voltage of 220Vac and a transformer turns ratio

of 5:1 is terminated with a load RL=1kΩ. Sketch the output voltage and current across the load.

Draw the output voltage of the bridge rectifier shown. Notice that all diodes are

reversed from previous circuits.

and a transformer turns ratio

Ω. Sketch the output voltage and current across the load.

Draw the output voltage of the bridge rectifier shown. Notice that all diodes are

Example#6: Design a full-wave bridge type rectifier circuit with an input voltage of 120V

transformer turns ratio of 1:2. The circuit must have a P

substitute (1) to (2):

4.8=0.5(339.46)Ip

Ip=28.28mA

therefore, R=12kΩ

Example #7: Determine the ripple factor of the circuit.

wave bridge type rectifier circuit with an input voltage of 120V

transformer turns ratio of 1:2. The circuit must have a Pac=4.8W across the load.

p

Determine the ripple factor of the circuit.

wave bridge type rectifier circuit with an input voltage of 120Vac and a

=4.8W across the load.

Example #8: Compute for the ripple voltage.

Example #9:A full-wave center-tapped circuit is used to rectify a sinusoid of 120V

the minimum output voltage cannot drop below 100V and the load resistance is 5k

capacitor is needed across RL? The transformer turns ratio is 1:2.

Compute for the ripple voltage.

tapped circuit is used to rectify a sinusoid of 120V

the minimum output voltage cannot drop below 100V and the load resistance is 5k

? The transformer turns ratio is 1:2.

tapped circuit is used to rectify a sinusoid of 120Vrms at 60Hz. If

the minimum output voltage cannot drop below 100V and the load resistance is 5kΩ, what size