Patent · US Expired

Selective call receivers with stepwise variable gain control

US5734974A · kind A · utility

16Cited by

2References

10Claims

0Family size

Assignee

Motorola, Inc. · US

Inventors

Edgar H. Callaway, Jr. · Boca Raton, US
James G. Mittel · Sanford, US
Vance H. Peterson · Boca Raton, US
Burkhard Dick · Hamburg, DE
Knud Holtvoeth · Hamburg, DE
Wilfried Knop · Appen, DE

Key dates

Filing date	Mar 27, 1996
Grant date	Mar 31, 1998
Priority date	—
Expiry date	Mar 27, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH03G1/0088
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A receiver (100) for receiving an input signal and generating an output signal therefrom has a switchable gain circuit (104) with a stepwise variable gain control (118), a local oscillator (106) and an automatic gain control (AGC) detector (114) with a response for detecting a level of the output signal and generating an AGC signal indicative of the level of the output signal and a state machine (116) being responsive to the AGC signal generating a control signal at the stepwise variable gain control to increase or decrease a gain of the switchable gain circuit in discrete stepwise steps.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.