Op Amp And Linear Integrated Circuits By Ramakant Gayakwad Pdf 124

Op Amp and Linear Integrated Circuits by Ramakant Gayakwad PDF 124: A Comprehensive Guide

Deep Dive: What You Typically Find on Page 124

• Practical Input Impedance ($Z_i$): In a practical op-amp (like the 741), the input impedance is not infinite. It is typically in the range of 1 MΩ to 6 MΩ. This finite impedance means the op-amp will draw some current from the input source, creating a loading effect.
• Practical Output Impedance ($Z_o$): The output impedance is not zero. For a typical 741, the open-loop output impedance is approximately 75 Ω. This internal resistance limits the maximum output voltage swing when the op-amp drives a low-resistance load.

• Operational amplifier (op amp) idealized model: infinite open-loop gain (A), infinite input impedance, zero output impedance, infinite bandwidth, zero offset.
• Important parameters: open-loop gain, input offset voltage, bias currents, input offset current, input and output impedance, common-mode rejection ratio (CMRR), power-supply rejection ratio (PSRR), slew rate, gain-bandwidth product (GBW), noise.
• Linear configurations:
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  Designing a single-supply instrumentation amplifier for a thermocouple:

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