Class c power amplifier lab manual

Class (A) Operation a.c. output power L (Icmax)2 R 2 1 L 2 2R Vomax Power supplied = Vcc I cQ L Q 2 Q 2 cmax 2RVccI Vomax 2VccI i efficiency Class B operation a.c. output power L 2 2R Vomax L 2 8R Vop.p Power supplied = Vcc I cav = 2 Vcc / R L For ideal class B operation: Power ac L 2 2R Vcc Power dc L 2 2R Vcc 2R IcavVcc Vomax L 2. 10 Class C tuned amplifier SIMULATION USING PSPICE 11 Frequency response of CE amplifier with Emitter resistance. 12 DC response of CS amplifier 13 Fr equ ncy resp onse f Casc de ampl if. 14 Transfer Characteristics of Class B Power Amplifier. • Bias point amplifiers –Class-A –Class-B –Class-C • Switching amplifier –Class-E –Class-F ©James Buckwalter PA Waveform • Drain current consists of DC current and AC current Example: 1 W Power Amplifier in CMOS • You are asked .

7. Power Amplifiers: Push pull amplifier in class B mode of operation- measurement of gain. 8. Differential Amplifier: Implementation of transistor differential amplifier. Non ideal characteristics of differential amplifier. 9. Oscillators: Sinusoidal Oscillators- (a) W ein bridge oscillator (b) ph ase shift oscillator. 4 differential amplifier using bjt 15 5 darlington amplifier using bjt 18 6 source follower with bootstrapped circuit 21 7 class - a power amplifier 24 8 class – b complementary symmetry power amplifier 27 9 frequency response of ce amplifier with emitter resistance amplifier 32 10 dc response of cs amplifier Class C power amplifier circuit diagram. Biasing resistor Rb pulls the base of Q1 further downwards and the Q-point will be set some way below the cut-off point in the DC load line. As a result the transistor will start conducting only after the input signal amplitude has risen above the base emitter voltage (Vbe~V) plus the downward bias voltage caused by Rb.

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