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. 07, 2004
Filed:
May. 30, 2003
Mehmet Ali Tan, Irvine, CA (US);
Geert Adolf DeVeirman, Corona del Mar, CA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
A transconductance control circuit includes a master device having first and second field effect devices coupled to respective first and second current sources, a reference device coupled to a third current source, and comparison circuitry. The comparison circuitry includes at least first, second and third inputs and at least one output, with the first input configured to receive a reference signal associated with the reference device, the second and third inputs coupled to respective terminals of the first and second field effect devices, and the output coupled to current control inputs of one or more of the current sources. The transconductance control circuit provides a feedback control arrangement in which, for example, the comparison circuitry output is utilized to adjust one or more of the current sources such that a difference signal V between voltages at the respective terminals of the first and second field effect devices converges to a reference signal V . As a result, the transconductance g of the first field effect device converges to the conductance of the reference device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile