Ex. 1 Draw the circuit (1) and calculate (2) the collector-emitter voltage VCE for the Voltage Divider Bias VDB circuit

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Ex 1 Draw The Circuit 1 And Calculate 2 The Collector Emitter Voltage Vce For The Voltage Divider Bias Vdb Circuit 1 (539.29 KiB) Viewed 27 times

Ex. 1 Draw the circuit (1) and calculate (2) the collector-emitter voltage VCE for the Voltage Divider Bias VDB circuit with the following parameters: VCC = 125V, R1= 1.5KQ, R2- 330kQ, RC= 1.2k0 RE-4700 and B-100 [3 points] Ex. 2 The VDB circuit of the previous exercise is now capacitor coupled to an AC supply vG(pp) = 2mV and a load of RL = 6.8kQ, a bypass capacitor connects to RE. There is also a generator impedance RG-6500. Draw the new circuit (1) its T equivalent circuit (1) and find the value of re' (1). Then find the voltage gain AV (2) [5 points] Ex. 3 Draw a two-stage voltage amplifier circuit (2) made up of two capacitor coupled VDB circuits of Ex2, with vin = 2mV, Vcc-15V, RG= 6500, B= 100 and RL= 6.8kQ. Now draw underneath its T equivalent (3) circuit. For this circuit calculate and the ac collector voltage of the first stage vc1 (2), the total gain AV (3) and the ac output voltage across the load resistor yout (2). You may use results from the previous questions, where needed. [12 points] Ex. 4 The two-stage voltage amplifier in of the previous exercise become swamped by splitting the 4700 emitter resistor into an re -1000 and an RE-3700 draw the new circuit (2) and calculate the Zin(base) (1), the Zin(stage)(1) and the ac collector voltage of the first stage(1), the total gain AV (2) and the ac output voltage across the load resistor vout (2). How does the ac output voltage across the load resistor in the previous exercise compare the one found in this exercise what are the benefits(1)? [10 points] Ex. 5 In the previous exercise, a variable feedback resistor is added between the second stage and the first stage. Draw the new circuit (3) and find the minimum gain AVmin(1) and maximum AVmax (1) gain if the variable resistor is made up of a fixed Rf = 1kQ and a variable Rv = 0-10 kn.