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. 28, 2006
Filed:
Mar. 24, 2004
Adam B. Wilson, Colchester, VT (US);
Ryan Jurasek, Burlington, VT (US);
Adam B. Wilson, Colchester, VT (US);
Ryan Jurasek, Burlington, VT (US);
Cypress Semiconductor Corporation, San Jose, CA (US);
Abstract
A voltage trim circuit, in accordance with one embodiment of the invention, includes an operational amplifier, a transistor, a voltage divider and a bias current circuit. The operational amplifier is coupled to an input. The transistor is coupled to the operational amplifier and a first potential. The voltage divider circuit is coupled to the operational amplifier, the transistor and an output. The bias current circuit is coupled to the voltage divider circuit and a second potential. The voltage divider generates an output voltage as a function of a selectable divider ratio and provides a substantially constant feedback path to the operational amplifier. The bias current circuit provides for selectively adjusting a load resistance of the transistor to maintain a substantially constant load current through the transistor.