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Introduction To Operational Amplifiers. Electronic Design Laboratory. Overview. Non-Inverting Op Amp Open-Loop & Closed Loop Frequency Response Slew Rate Limiting. Non-Inverting. + -. Vin =V + V -. V out. V + = V - V in = V out • R 1 /(R 1 + R 2 ). R 2. R 1.

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introduction to operational amplifiers

Introduction To Operational Amplifiers

Electronic Design Laboratory

overview
Overview
  • Non-Inverting Op Amp
  • Open-Loop & Closed Loop Frequency Response
  • Slew Rate Limiting
non inverting
Non-Inverting

+

-

Vin =V+

V-

Vout

V+ = V-

Vin = Vout• R1/(R1 + R2)

R2

R1

dominate pole frequency response
Dominate Pole Frequency Response

20Log Av

-20 dB/decade

Aopen-loop

fclosed-loop

0 dB

Log f

fopen-loop

See page 764 in text

compensation capacitance

Vout

time

Compensation Capacitance

Saturated BJT or

Linear MOSFET

Imax

Slew-Rate Limited

Output

Internal

Compensation

Capacitor

Vin

time