# Lecture_31 - What is the gain of op amp A 3 ? What is the...

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EE 310 Lecture 31 The Instrumentation Amplifier Fully differential inputs Very large R in Adjustable gain by changing one resistor Needed: A circuit with What are the deficiencies of the above circuit with the component values shown? 1 kΩ 1 kΩ 100 kΩ 100 kΩ Lecture 31 Page 1

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Fixing the Low R in Problem Add additional op amps to solve the low R in problem: What deficiency still remains? EE 310 Lecture 31 Lecture 31 Page 2
Fixing the Adjustable Gain Problem Instrumentation Amplifier Configuration Identify the line of symmetry: What is the gain of op amps A 1 and A 2 ?

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Unformatted text preview: What is the gain of op amp A 3 ? What is the overall gain expression? EE 310 Lecture 31 Lecture 31 Page 3 Example Design the circuit so that the gain may be varied over a range of 5 500 V/V. The gain of A 3 should be fixed at 2. EE 310 Lecture 31 Lecture 31 Page 4 The Op-Amp Integrator Express v O as a function of v I : EE 310 Lecture 31 Lecture 31 Page 5 Integrator Example t t v O v I Let v I ( t ) be a square wave as shown. Sketch v O ( t ). Assume that v C (0) = 0V A T EE 310 Lecture 31 Lecture 31 Page 6...
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## This note was uploaded on 10/12/2010 for the course E E 310 at Pennsylvania State University, University Park.

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Lecture_31 - What is the gain of op amp A 3 ? What is the...

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