Lecture29-Differential+Amplifier

Lecture29-Differential+Amplifier - ECE 3040 Microelectronic...

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ECE 3040 - Dr. Ying Zhang Georgia Tech ECE 3040: Microelectronic Circuits Lecture 29 Reading: Jaeger 15.1-15.3, Notes
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ECE 3040 - Dr. Ying Zhang Georgia Tech + v S + + - v O2 + - v O1 R 3 R 2 R 1 i i i Find expression for the voltage v o1 and v o2 in terms of v s , R 1 , R 2 , and R 3 . The op amps are ideal.
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ECE 3040 - Dr. Ying Zhang Georgia Tech ± Differential Amplifier ± DC Analysis of BJT Differential Amplifier ± AC Analysis of BJT Differential Amplifier ± Differential Mode Input Signals ± Common Mode Input Signals ± Common Mode Rejection Ratio Agenda
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ECE 3040 - Dr. Ying Zhang Georgia Tech
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ECE 3040 - Dr. Ying Zhang Georgia Tech Differential Amplifiers The differential output voltage, v OD , (difference in two collector/drain voltages) is the amplified difference of the two input signals v OD =A v-d (v 1 -v 2 )
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ECE 3040 - Dr. Ying Zhang Georgia Tech Differential Amplifiers Q-Point: Assume “Matched Transistors” (identical parameters) Set the time varying voltage sources to zero
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Lecture29-Differential+Amplifier - ECE 3040 Microelectronic...

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