iPad 8:58 PM 46%. EE330L Lab 7 DESIGN OF A COMMONEMITTER BIASING CIRCUIT You wil
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iPad 8:58 PM 46%. EE330L Lab 7 DESIGN OF A COMMONEMITTER BIASING CIRCUIT You will be able to select appropriate values of resistors and supply voltage to yield a CE amplifier with the DC bias point (Q point) stabilized against variation in transistor parameters induced by temperature variations or manufacturing differences. You will be able to confirm the validity of this design with computer simulation and experimental observations. The major part of this exercise is in the circuit design and computer confirmation. If the design is valid, little time should be required in the laboratory for hookup and design verification Study section 5.12 of Jaeger& Blalock to understand the basic design procedures for obtaining a beta independent CE circuit as shown in Figure 1 belovw A. 4.7k N2222 R2 Figure 1 Common Emitter AmplifierExplanation / Answer
by changing the input capcitance we are changing the amunt of dc that is allowed from the signal and that results in change in the biasingbpoint.
if the capacitance value is decreased the amount of dc alloewed is changed and that results in change in biasing point .there are two points in gain one is dc voltage gain and ac voltage gain when the capacitor is if suitabke value then the dc input is notallowed and so dc gain doesnt do anything.if the dc is not blocked biasing point is change this effects the gain the outout .
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