Browse Prior Art Database

Automatic Gain Control

IP.com Disclosure Number: IPCOM000091593D
Original Publication Date: 1968-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 23K

Publishing Venue

IBM

Related People

Esteban, D: AUTHOR [+2]

Abstract

The device uses an analog-to-digital converter in which the reference voltage is variable instead of being constant. The digital output of the A-D converter represents the number of times the analog input comprises the reference voltage. Since the reference voltage is variable, the A-D converter acts as a divider. The digital output represents the result of the division of the analog input by the reference voltage. The analog result of the division is obtained by passing the digital result into a digital-to-analog converter. This arrangement is used to achieve an automatic gain control. The variable reference voltage is derived from the analog input signal through a rectifier and a low-pass filter.

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Automatic Gain Control

The device uses an analog-to-digital converter in which the reference voltage is variable instead of being constant. The digital output of the A-D converter represents the number of times the analog input comprises the reference voltage. Since the reference voltage is variable, the A-D converter acts as a divider. The digital output represents the result of the division of the analog input by the reference voltage. The analog result of the division is obtained by passing the digital result into a digital-to-analog converter. This arrangement is used to achieve an automatic gain control. The variable reference voltage is derived from the analog input signal through a rectifier and a low-pass filter. The automatic gain control is achieved through division of the analog input signal by the signal itself, rectified and filtered.

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