Class C Power Amplifier Circuit Diagram And Theory Output. Circuit diagram for class a amplifier using tip35c. As shown in the above circuit diagram resistor rb connects to the transistor q1 base.

A class c power amplifier is biased to operate for less than 180 of the input signal cycle as shown in circuit. As a result the transistor will start conducting only after the input signal amplitude has risen above the base emitter voltage vbe 0 7v plus the downward bias voltage caused by rb. In the above circuit the biasing resistor rb is used to pull the base terminal of the q1 transistor further downwards.

The q point will be fixed to below the cutoff point in the dc load line.

The tuned circuit in the output however will provide a full cycle of output signal for the fundamental or resonant frequency of the tuned circuit l and c tank circuit of the output. A biasing resistor which connects to the base of q1 try to pulls the base of transistor further downwards and set the operating pointer dc bias point below the cut off point in cutoff the collector current is i co which will be of micro amperes order. 4 circuit diagram of class c power amplifier. The efficiency of class c amplifier is much more than the a b and ab.