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:
Feb. 06, 1990
Filed:
Feb. 01, 1988
George P Hoekstra, Fair Oaks, CA (US);
Lal C Sood, Austin, TX (US);
Samuel E Alexander, Austin, TX (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
In a static random access memory in which the array is comprised of MOS transistors and at least some of the peripheral circuits are comprised of bipolar transistors, the bit lines and data lines are precharged to a base to emitter voltage drop (i.e. one Vbe) below the positive power supply voltage. This increases cell stability. Additionally, Vbe varies comparatively little over process. Additionally, precharging the bit lines and data lines to a Vbe below the positive power supply voltage allows for the use of a high speed bipolar differential amplifier in its optimum operating range as the first stage sense amplifier.