8 Parameter Measurement Information

All parameters are measured according to the conditions described in the Specifications section.

9 Detailed Description

9.1 Overview

The LM567C is a general purpose tone decoder. The circuit consists of I and Q detectors driven by a voltage

controlled oscillator which determines the center frequency of the decoder. This device is designed to provide

a transistor switch to ground output when the input signal frequency matches the center frequency pass band.

Center frequency is set by an external timing circuit composed by a capacitor and a resistor. Bandwidth and

output delay are set by external capacitors.

9.2 Functional Block Diagram

LM567, LM567C

SNOSBQ4F – MAY 1999 – REVISED JANUARY 2022

www.ti.com

8

Submit Document Feedback

Copyright © 2022 Texas Instruments Incorporated

Product Folder Links: LM567 LM567C