Download transistor circuit7/7/2023 ![]() Large-Signal dc Analysis:characteristics of an npn BJT Large-Signal dc Analysis:Cutoff-Region Model VCB reverse bias ? VBE reverse bias ? If small forward-bias voltage of up to about 0.5 V are applied, the currents are often negligible and we use the cutoff-region model. Large-Signal dc Analysis:Saturation-Region Model VCB forward bias ? VBE forward bias ? Large-Signal dc Analysis:Active-Region Model Important: a current-controlled current source models the dependence of the collector current on the base current VCB reverse bias ? VBE forward bias ? The constrains for IB and VCE must be satisfy to keep BJT in the active-mode Amplifiers Chapter 13: Bipolar Junction TransistorsĬircuit with BJTs Our approach: Operating point - dc operating point Analysis of the signals - the signals to be amplified Circuit is divided into: model for large-signal dc analysis of BJT circuit bias circuits for BJT amplifier small-signal models used to analyze circuits for signals being amplified Remember !.Bipolar Junction Transistor Circuit Analysis EE314
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