The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 1987
Filed:
Oct. 28, 1985
Joseph R Cavaliere, Hopewell Junction, NY (US);
Albert Y Chang, Poughkeepsie, NY (US);
Rocco J Robortaccio, Hopewell Junction, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A simultaneous bi-directional transceiver is described. The transceiver comprises two circuits which are disposed at opposite ends of an interchip cable. In response to the application of digital data signals to these circuits, they generate a trilevel voltage at the ends of the interchip cable. Then, in each circuit, a first input to a differential amplifier is generated from the trilevel voltage by a level shifter comprising a first diode and a first constant current sink and a second input to the differential amplifier is derived from the digital data input signal applied to that circuit by a level shifter comprising a second diode and a second constant current source. Finally, the transceiver outputs are generated from the differential amplifier outputs.