Microelectronics

# Op Amps Design Application and Troubleshooting by David Terrell

By David Terrell

OP Amps intentionally straddles that imaginary line among the technician and engineering worlds. subject matters are conscientiously addressed on 3 degrees: operational assessment, numerical research, and layout approaches. Troubleshooting thoughts are awarded that depend upon the applying of primary electronics rules. Systematic tools are proven that may be used to diagnose defects in lots of sorts of circuits that hire operational amplifiers

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Op Amps Design Application and Troubleshooting

OP Amps intentionally straddles that imaginary line among the technician and engineering worlds. issues are conscientiously addressed on 3 degrees: operational evaluation, numerical research, and layout approaches. Troubleshooting recommendations are offered that depend on the applying of basic electronics rules.

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Ohm's and Kirchhoff's laws are essential tools for the analysis of op amp circuits. Additionally/ simplification methods such as Thevenin's Theorem, Norton's Theorem, and the Superposition Theorem can simplify the analysis of otherwise complex op amp circuits. 1 contrasts the characteristics of an ideal op amp with those of a typical op amp. Practical op amps require a DC power source, and in many cases, a dual (±) supply. It is important that the power distribution system be properly constructed and effectively decoupled to prevent oscillation and other performance problems.

For now, you should strive to understand the meaning of common-mode voltage gain and how it differs from the differential voltage gain. 3 Bandwidth You will recall from your studies of basic amplifier and/or filter theory that the bandwidth of a circuit is defined as the range of frequencies that can be passed or amplified with less than 3 dB power loss. In the case of the ideal op amp, we said that the bandwidth was infinite because it could respond equally well to frequencies extending from DC through infinitely high frequencies.

If the largest output voltage swing for a particular 741 design is ±5 volts, what is the highest sinewave frequency that can be amplified before slew rate limiting begins to distort the output? ) Refer to Appendix 1 for questions 13 to 15. 13. What is the open-loop voltage gain of a standard 741 op amp at a frequency of 2 hertz (interpret the graphical data)? 14. What is the minimum input resistance of a 741 op amp? 15. What is the approximate open-loop voltage gain of a standard 741 op amp at a frequency of 100 kilohertz (interpret the graphical data)?