WIDEBAND DATA RECEIVER
Original Publication Date: 1993-Oct-01
Included in the Prior Art Database: 2002-Feb-14
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.