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Problem 2: BJT Small-Signal Voltage Amplifiers In the lectures, we covered in detail the analysis of an npn BJT amplifier that utilizes a single-supply DC biasing. In this problem, you wi meet two additional amplifier architectures-one that is based on dual DC supplies combined with a DC current source, and the other that utilizes a pnp BJT with single-supply biasing In both problems (below) you need to manually find the amplifier's Q-point (that is, the DC values of Ic and VcE), the BJT small-signal parameters (re, r, gm and , drawing of the amplifier's small-signal diagram, the amplifier's input resistance Rin and the amplifier's voltage gain Ay- Vo/v, In the PSPICE/Multisim simulations verify the DC conditions and measure Rin and Av (using both simulation modes-Time Domain and AC Sweep) The supply voltages a involve 10V voltages (that is VccVEE10V). In both problems the signal source resistance is Rsig - 1002 and the load resistance is RL 15KS2. The large capacitors are assumed infinite (for hand-calculations) and in PSPICE take each to be equal to C-mF In both problems let R('-3.5K(2.
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