PRE-LAB CALCULATION Determine the small-signal voltage gain, Av of the circuit in Figure 1. Given forward transfer conductance, gm=2000uS. 20 V 2.2k 200k< 2.2uF 2.2uF RL HE 1k R V. 50k 1k FIGURE 1

Hand Calculation: Since you now have the values of R1 and R2 resistors, obtain numeric value of voltage gain Av=Vo/Vi, and numerical values of input and output resistances Ri and Ro. Note that you need to DC analysis first. Do a hand calculation and calculate the DC collector current or IC. This is needed in order to calculate the small signal parameters gm and rπ and in turn to obtain the Av , Ri and Ro Hence, first perform a DC analysis (use the circuit in Figure 1 and take all capacitors open) and assume your transistor has a β=140.

For the given Common Emitter NPN Amplifier, the transistor made of Germanium diodes, BDC-80, Vcc Rc-3.9 K2, RE-0.68 KQ. a) Name the type of biasing used in the above circuit? 1 = 16 volts, R= 62 KQ, Rz 9.1 K R, Rc Cs b) Find VE? Find VCE? d) Find Vc? e) What is the name of the capacitors C1, C3 and C2?