PHYS345 PHYS345 Class 19

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Amplifiers and Op Amps

Properties of Amplifiers

Model of simple amplifier

Amplifiers in Use

Transducer, amplifier, and load

Op Amps

What's inside? 741, LF356

What matters to us:
Generic Op Amp

Golden Rules of Op Amps

  1. With negative feedback, the output attempts to do whatever is necessary to make the voltage difference between the two inputs ZERO.
  2. The inputs draw no current.

Inverting Amplifier
Inverting Amplifier

Non-Inverting Amplifier
Non-Inverting Amplifier

Voltage Follower
Voltage Follower

Quiz 9:   Karnaugh Mapping

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Last updated November 11, 1999.
Copyright George Watson, Univ. of Delaware, 1998.