Signal Interface Circuit with Selectable Signal Interface Parameters

ITI Scotland Ltd. (1997) Signal Interface Circuit with Selectable Signal Interface Parameters. .

Abstract

A signal interface circuit with selectable signal interface parameters for a telephone subscriber line includes an impedance circuit having a selectable impedance value, signal terminals having an associated, definable termination impedance, a transmitter circuit having a definable transmitter transfer function and a receiver circuit having a definable receiver transfer function. The signal terminals connect to an external signal line pair having an associated line impedance for conducting outgoing and incoming signals therefrom and thereto, respectively. The transmitter circuit receives the outgoing signal from the signal terminals and provides a transmit signal in accordance with its transmitter transfer function. The receiver circuit, which includes a differential transconductance amplifier, receives an input signal and the transmit signal and provides the incoming signal to the signal terminals in accordance with its receiver transfer function. The termination impedance, transmitter transfer function and receiver transfer function are all defined by the selectable impedance, with the termination impedance defined to match the line impedance.

• Item Type: Patents
• Additional Information: Application Number US 08/353,095; ; Publication Number US5598467 A; ; Inventor: Duncan J. Bremner, Roger K. Benton, James B. Wieser.
• Status: Published
• Glasgow Author(s) Enlighten ID: Bremner, Dr Duncan
• Authors: Bremner, D., Benton, R. K., and Wieser, J. B.
• College/School: College of Science and Engineering > School of Engineering