Class C Biasing
The Class C amplifier has a negative voltage at the base, and zero
volts at the emitter. The Base-Emitter junction is reverse biased
The transistor will turn on at a signal voltage of 4.7V. The
transistor will only conduct a small pulse through to the collector
Amplifier is very efficient but has very little usefulness….
Class C Application
Collector resonant circuit responds to an impulse by
‘ringing’ at its resonant frequency. This is like pushing
someone on a swing. A sharp short push each trip
allows the swing to oscillate back and forth at its
Collector impulses occur by design at the resonant
frequency of the tank circuit.
Resonant circuit continues to ring and restores the sine
wave at the output
Class C Amplifier is used in radio/RF applications and
is also called a ‘tuned’ amplifier.
Ringing Of Tank Circuit
Resonant (tank) circuit