design a small-signal bjt amplifier using a four-resistor
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Design a Small‐Signal BJT Amplifier Using a Four‐Resistor Bias Circuit
(CE Configuration)Applied Electronics (I)
Prof. Y. W. Suen
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Specifications:Gain: ~ ‐20 V/V Input Resistance: > 1kSource Resistance: 50 Load Resistance: 600 Standby Power: <10mW DC Power Supply: 5VAC Couple with Low Frequency Limit around 20 Hz.Transistor Type: 2N3904
Configuration:
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Check the result with LTspice and find adequate C’s
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C should be chosen around 470 uF. After try‐and‐error, it is about 350 uF.
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