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:
Dec. 18, 2001
Filed:
Nov. 02, 2000
Adam Whitworth, Sunnyvale, CA (US);
Dominick Richiuso, Saratoga, CA (US);
California Micro Devices Corporation, Milpitas, CA (US);
Abstract
An active termination circuit having a selective DC power consumption for clamping signals on a bus in an electronic device is described. The active termination circuit is configured to clamp the signals on the bus to one of a first reference voltage level and a second reference voltage level. In one embodiment, the active termination circuit includes bottom clamping transistors coupled to a first potential having bottom clamping transistor control nodes arranged for clamping the signal at about a first reference voltage. The active termination circuit also includes top clamping transistors coupled to a second potential having top clamping transistor control nodes arranged for clamping the signal at about a second reference voltage. The circuit also has a variable current supply coupled to said first threshold reference transistor and said second threshold reference transistor arranged to reduce the DC power consumption of the active termination circuit as needed.