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:
Oct. 29, 2002
Filed:
Oct. 30, 2000
Alan R. Desroches, San Jose, CA (US);
Hewlett-Packard Compnay, Palo Alto, CA (US);
Abstract
A voltage divider suppresses noise in a voltage divider output by filtering the voltages at the gate terminals of the transistors that comprise a voltage divider. In one embodiment of the present invention, a voltage divider includes a PFET transistor coupled between a voltage VDD and the voltage divider output, and an NFET transistor coupled between a voltage VSS and the voltage divider output, with a resistor-capacitor (RC) filter provided at each gate terminal of each of the transistors. In a second embodiment, the RC filter is fabricated using only transistors. In both embodiments, noise is filtered out at the gate terminal of the transistors, thereby eliminating noise in the resulting voltage divider output. Accordingly, a capacitor is not required between the voltage divider output and VSS, as in the prior art.