CIRCUIT060052

Low-pass filtered, inverting amplifier circuit

CIRCUIT060052

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Overview

This tunable low–pass inverting amplifier circuit amplifies the signal level by 26 dB or 20V/V. R2 and C1 set the cutoff frequency for this circuit. The frequency response of this circuit is the same as that of a passive RC filter, except that the output is amplified by the pass–band gain of the amplifier. Low–pass filters are often used in audio signal chains and are sometimes called bass–boost filters.
Features
  • Input: Vi = -0.1 V to 0.1 V
  • Output: Vo = -2 V to 2 V
  • BW: fp = 2 kHz
  • Supply:
    • Vee = -2.5 V
    • Vcc = 2.5 V

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Design tool

Simulation for Single-Supply Low-Side Unidirectional Current-Sense Circuit SBOC523.ZIP (13KB)

Supported products & hardware

Supported products & hardware

General-purpose op amps
OPA375 Single, 5.5-V, 10-MHz, low noise (4.6-nV/√Hz), 68-mA output current, RRO operational amplifier TLV9002 Dual, 5.5-V, 1-MHz, RRIO operational amplifier for cost-optimized applications

Technical documentation

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Type Title Date
* Circuit design Low-Pass Filtered, Inverting Amplifier Circuit (Rev. A) Jan. 05, 2021
Application note Basic Introduction to Filters - Active, Passive, and Switched-Cap (Rev. A) Apr. 21, 2010
Application note More Filter Design on a Budget Dec. 06, 2001

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Reference designs

REFERENCE DESIGN
TIPD185 AC Coupled, Single-Supply, Inverting and Non-inverting Amplifier Reference Design

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