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Chapter 12: Problem 15

Sketch the circuit diagram of a quasi-complementary amplifier, showing voltage waveforms in the circuit.

Short Answer

Expert verified
A quasi-complementary amplifier is constructed with an NPN and a PNP transistor, with their emitters and bases connected. Input signal is connected to the base of the NPN transistor, while output signal is from the collector of the PNP transistor. Voltage waveforms at these points show that the output is 180 degrees out of phase with the input.

Step by step solution

01

Draw the Basic Circuit

Begin by drawing the basic circuit of a quasi-complementary amplifier. This typically involves an NPN transistor and a PNP transistor, arranged in a specific manner. Both transistors must be connected to an output, with the emitter of the NPN transistor connected to the base of the PNP transistor.
02

Label the Elements

After sketching the circuit, all elements including the transistors, resistors, capacitors, input and output signals should be labeled accordingly. Make sure to indicate the power supply as well.
03

Indicate the Input and Output Signals

The input signal should be shown as connected to the base of the NPN transistor, while the output signal should be shown as taken from the collector of the PNP transistor. Indicate these connections on your diagram.
04

Draw Voltage Waveforms

Next to each transistor, draw a sine wave to represent the voltage waveform in the circuit. Make sure the output sine wave is 180 degrees out of phase with the input sine wave, as this is the characteristic of a quasi-complementary amplifier, indicating that the output signal is inverted with respect to the input signal.

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