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:
Jul. 31, 2007
Filed:
Oct. 21, 2005
Jianguo Yao, Londonderry, NH (US);
Jianguo Yao, Londonderry, NH (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An amplifier circuit includes a first amplifier and a second amplifier and sets of switching devices controlled by a bistate control signal. The bistate control signal is in the first state to cause the first and second sets of switching devices to configure the first amplifier and the second amplifier in a positive parallel configuration and the bistate control signal is in the second state to cause the first and second sets of switching devices to configure the first amplifier and the second amplifier in a negative parallel configuration. When the bistate control signal switches states at each sample cycle of the amplifier circuit, the first amplifier and the second amplifier toggle between the positive parallel configuration and the negative parallel configurations to cancel out crosstalk signals stored at the positive and negative input terminals of the first and second amplifier circuit.