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:
Apr. 04, 2000
Filed:
May. 04, 1998
Robert R Livolsi, Shokan, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A differential receiver cell circuit is provided for a CMOS chip for use in chip to chip interfaces. The differential receiver cell is testable to enable the testing of the functioning of other circuits on the CMOS chip. The receiver cell is provided (between a voltage source VDD! and ground GND!) with a bias switch circuit comprising a PFET T115 having its drain connected to the receiver cell's voltage source. This source has a node VDD! connected to a self biasing network composed of PFET T106 and NFET T107 whose input node NB and output are connected to control a current controlling device NFET T118 whose drain is connected to a common node NA and whose source is coupled to ground.