Chapter 14. Operational Amplifiers. 741 Operational Amplifier. Introduction. Operational Amplifiers are integrated circuits (IC’s) that have a number of advantages over the standalone transistors. Circuit Symbol and IC Pinouts. 741 Operational Amplifier. Ideal Op-Amp (page 664). - PowerPoint PPT Presentation
Transcript of Chapter 14
Chapter 14Operational Amplifiers
741 Operational Amplifier
IntroductionOperational Amplifiers are
integrated circuits (IC’s) that have a number of advantages over the standalone transistors.
Circuit Symbol and IC Pinouts
741 Operational Amplifier
Ideal Op-Amp (page 664)1. The circuitry of an operational amplifier
with a closed, negative-feedback loop will adjust its output in any way possible to make the inverting input and non-inverting input terminals of the device equal in voltage.
2. Infinite Input Impedance The inputs draw no current.
Inverting Amplifier
How does Vout depend in Vin?
Is there a phase shift between Vout and Vin?
Non-Inverting Amplifier
How does Vout depend in Vin?
Is there a phase shift between Vout and Vin?
Voltage Follower
How does Vout depend in Vin?
Is there a phase shift between Vout and Vin?
Example ProblemsSketch the Equivalent Circuit and Find the Gain (Av)
Example 14.1P14.11 * P14.10 * P14.20 * P14.9 * Figure 14.8 (a) and (b)
Stop Here
Difference Amplifier
How does Vout depend in Vin?
Is there a phase shift between Vout and Vin?
TransformersTransformer Makers Equations
rms2
rms1
1
2
rms1
rms2
II
NN
VV
H-bridge circuit for controlling motors. http://www.cpg1.freeserve.co.uk/servos/servos.htm