iin (A RL Figure P13.25 R İin (1 RL Figure P13.24

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.

Q4: Consider the uA741C-based op-amp amplifier circuit shown below; The input voltage, Vi, is 2.5 volts. R2 is 5,000 ohms and RI is 1,000 ohms : R2 vo • What is the name of the circuit? • What is the value of the voltage at the negative input of the op-amp? • What is the value of the current through the 1 k2 resistor, in?