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:
Mar. 17, 1992
Filed:
Nov. 09, 1990
Applicant:
Inventors:
Theodor W Mahler, Sherman, TX (US);
Susan A Curtis, Sherman, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307475 ; 307446 ; 307451 ; 307542 ; 307548 ; 307570 ; 307572 ;
Abstract
An input circuit is provided which receives TTL voltage signals as input and transmits CMOS voltage signal levels. A separation transistor connected to a voltage divider network is included within the circuit to separate the two gates of a CMOS inverter from the TTL input such that one gate of the inverter is fully off when the other gate is on and fully on when the other gate is off. Thus internal ground voltage fluctuations during operation of the circuit are avoided.