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:
Jul. 19, 1994
Filed:
Nov. 10, 1992
Applicant:
Inventors:
Walter S Klara, Hopewell Junction, NY (US);
Frank A Montegari, Wappingers Falls, NY (US);
Gordon S Sager, Salt Point, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307243 ; 307254 ; 307475 ;
Abstract
A high speed bipolar multiplexer circuit adds less than ten picoseconds delay to the data or test paths. The multiplexer circuit incorporates a low gain linear amplifier which is completely stable and compensates for any level losses through the input emitter followers. The minimal delay introduced in the system data paths and the good isolation between system data inputs and test data inputs matches the performance of the logic and memory circuits of the chips in which multiplexer circuits are incorporated.