Lecture25-CC+CD+Amplifier

Lecture25-CC+CD+Amplifier - ECE 3040 - Dr. Ying Zhang...

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Unformatted text preview: ECE 3040 - Dr. Ying Zhang Georgia Tech ECE 3040: Microelectronic Circuits Lecture 25 Reading: Jaeger 14.1, 14.3 ECE 3040 - Dr. Ying Zhang Georgia Tech Recapture Common Emitter and Common Source r r is replaced with an open circuit for the MOSFET case g m v or g m v gs R in MOSFET for the 1 || 2 BJT for the || 1 || 2 R R Rin or r R R Rin = = MOSFET BJT for the || or R r Rout c o = r Rc R out Portion due to bias circuitry Portion due to transistor Portion due to bias circuitry Portion due to transistor ECE 3040 - Dr. Ying Zhang Georgia Tech Summary of Common Emitter and Common Source Characteristics Very Large Voltage Gain Inverting Voltage Gain (due to g m r o ) High Input Impedance High Output Impedance These properties make the CE/CS configuration very good for high gain stages of amplifiers. Recapture ECE 3040 - Dr. Ying Zhang Georgia Tech Common Collector/Drain Amplifier Voltage Gain Input Resistance Output Resistance Current Gain Agenda ECE 3040 - Dr. Ying Zhang Georgia Tech Transistor Amplifier Configurations Common Collector and Common Drain Collector (or Drain) is neither an input or output Input is Base (or Gate) Output is Emitter (or Source) B E C G S D DC Circuit ECE 3040 - Dr. Ying Zhang Georgia Tech Transistor Amplifier Configurations Common Collector DC Circuit converted to AC Equivalent DC Circuit Note the extra ground due to C 2 ECE 3040 - Dr. Ying ZhangECE 3040 - Dr....
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Lecture25-CC+CD+Amplifier - ECE 3040 - Dr. Ying Zhang...

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