Berkeley ELENG 105 - Lecture 24 Single stage amplifiers (17 pages)

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Lecture 24 Single stage amplifiers



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Lecture 24 Single stage amplifiers

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Pages:
17
School:
University of California, Berkeley
Course:
Eleng 105 - Microelectronic Devices and Circuits
Microelectronic Devices and Circuits Documents

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EECS 105 Spring 2004 Lecture 24 Lecture 24 Single stage amplifiers Prof J S Smith Department of EECS University of California Berkeley EECS 105 Spring 2004 Lecture 24 Prof J S Smith Context In today s lecture we will discuss general amplifier topology and how to use transistors to make single stage amplifiers of various kinds Department of EECS University of California Berkeley 1 EECS 105 Spring 2004 Lecture 24 Prof J S Smith Reading For about a a week after spring break we continuing in chapter 8 in the text single stage amplifiers There is no homework assignment over spring break Department of EECS University of California Berkeley EECS 105 Spring 2004 Lecture 24 Prof J S Smith Lecture Outline z z Review Small Signal Analysis Two Port Circuits z Department of EECS Voltage Amplifiers Current Amplifiers Transconductance Amps Transresistance Amps Example MOS Amp Again University of California Berkeley 2 EECS 105 Spring 2004 Lecture 24 Prof J S Smith Small Signal Analysis z Step 1 Find DC operating point Calculate estimate the DC voltages and currents ignore small signals sources z Substitute the small signal model of the MOSFET BJT Diode and the small signal models of the other circuit elements z Solve for desired parameters gain input impedance Department of EECS University of California Berkeley EECS 105 Spring 2004 Lecture 24 Prof J S Smith Amplifier Terminology z z z z z Sources Signal its source resistance and bias voltage or current Load Use resistor in Chap 8 but could be a general impedance Port A pair of terminals across which a voltage and an associated current are defined Source Load one port Amplifier two port Department of EECS University of California Berkeley 3 EECS 105 Spring 2004 Lecture 24 Prof J S Smith One Port Models EECS 40 z A terminal pair across which a voltage and associated current are defined iab vab Circuit Block iab vab iab Rthev vthev vab Rthev ithev Department of EECS University of California Berkeley EECS 105 Spring 2004 Lecture 24



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