Matching circuit 1 Matching circuit 2 SolutionClass C amplif

Solution

Class C amplifiers: a power amplifier operates in class C when the bias voltage and the maximum amplitude of the input signal have values such that make the output current flow for a half period of less input signal.

The amplifier class \"C\" is exclusive to \"RF\". Used as \"load\" a tank circuit.
The main feature of this amplifier is that the active element drive less than 180, a sinusoidal signal applied to its input. That is, only a portion which amplifies the signal.
His other feature, no less important is its high performance potential.

Both type of coupling, inductive and capacitive are used in
couplings circuits and output circuits grid plate. Inductive coupling introduces more attenuation to harmonics in the load capacitive couplings.
Furthermore the use of a shield between the inductance of the tank and the output circuit, minimizes capacitive coupling between these, decreasing the transfer load harmonics.

A normally used in the plate circuit network is a network, this network acts as the resonant circuit board introducing an increase in the attenuation of harmonics compared with the parallel resonant circuits of single-ended, providing further improved width band load impedance (best fit).

Therefore 2nd corresponding figure is better RF circuit and class C amplifier.