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:
May. 15, 2001
Filed:
Apr. 10, 2000
Brian Paul Brandt, Windham, NH (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A buffer circuit having voltage clamping capabilities. The buffer circuit includes an input transistor having a gate which receives the input voltage to be buffered and a source connected to a current source. A first clamping transistor has a source connected to the source of the input transistor and a gate which receives a lower clamping voltage. A second clamping transistor is connected intermediate the input transistor and a power supply rail and has a gate for receiving an upper clamping voltage. In one embodiment, the output of the buffer is at the source of the input transistor. In another embodiment, the buffer is implemented as a differential amplifier with the input, first clamping and second clamping transistors being on an input half of the amplifier and the output of the buffer being at the output half.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile