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:
Nov. 23, 1993
Filed:
Jan. 11, 1993
Michael J Wright, Boulder, CO (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A programmable voltage comparator having a programmable hysteresis function controlling the comparator's output relative to first and second comparator input voltage variables. The programmable voltage comparator comprises an inverting and non-inverting input for receiving a first and second input voltages and an output providing a logic state signal reflecting the amplitude of the inverting and non-inverting input voltages. The comparator includes level shift circuitry coupled to the inverting and non-inverting inputs for programmably shifting the amplitude of the voltages applied to the inverting and non-inverting inputs responsive to the logic state output of the comparator. In one embodiment, the comparator includes a differential amplifier having inverting and non-inverting outputs, wherein the level shift circuitry comprises a first level shift circuit coupled to the non-inverting voltage input and having a feedback element coupling to the non-inverting output. A second level shift circuit is coupled to the inverting input with a feedback element coupled to the inverting output.