Op Amps for Everyone, 5th Edition

Appendix E

Single-Supply Circuit Collection

E.1. Introduction

This appendix is a collection of single-supply op amp circuits. These are presented here because they are somewhat unusual and did not fit well into the material presented in the main portion of the book.

E.2. Attenuation

An inverting attenuation circuit¹ can be thought of as a T network in the R_G resistor. It is shown in Fig. E.1.

Figure E.1 Inverting attenuator circuit.

R_G is replaced by a T network consisting of R_INA, R_INB, and R₃. A set of normalized values of the resistor R₃ for various levels of attenuation is shown in Table E.1. For non-tabulated attenuation values, the resistance is: ...