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WIDEBAND DATA RECEIVER

IP.com Disclosure Number: IPCOM000006990D
Original Publication Date: 1993-Oct-01
Included in the Prior Art Database: 2002-Feb-14

Publishing Venue

Motorola

Related People

Authors:
Jeff Dutkofski Russ Kahl Mike Retzer

Abstract

Abstract: Low cost receiver integrated circuits used for narrow band voice applications do not typi- cally have adequate bandwidths for data applications approaching 1Mbps. In an FSK data system, it is necessary to have a wide receiver ~bandwidth and frequency response down to 0 Hz in order to accu- rately recover the received data pattern. This inven- tion uses an amplifier that provides a "virtual ground" at its input to cancel out any parasitic capacitance present in the integrated circuit that may limit the receiver bandwidth. The DC operating point of the circuit is stabilized by using low frequency feedback to the current amplifier's reference inputs.