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:
Apr. 20, 2004
Filed:
Dec. 04, 2002
Ayman A. Fayed, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A voltage controlled transconductor (VCT) for receiving a differential input signal comprising a first voltage signal and a second voltage signal, and for providing a differential output signal comprising a first output current signal and a second output current signal. The VCT includes a first side transconductor circuit having two parts of the same construction, the first part being capable of conducting a first current signal and the second part being capable of conducting a second current signal, the first current signal and the second current signal being controlled by the first voltage signal. The VCT also includes a second side transconductor circuit having two parts of the same construction, the first part being capable of conducting a third current signal and the second part being capable of conducting a fourth current signal, the third current signal and the fourth current signal being controlled by the second voltage signal. A first control circuit is adapted to control the first and second current signals of the first side transconductor circuit, while a second control circuit is adapted to control the third and fourth current signals of the second side transconductor circuit. The first side transconductor circuit is connected to the second side transconductor circuit to provide the first output current signal comprising a difference of the second current signal and the third current signal and to provide the second output current signal comprising a difference of the first current signal and the fourth current signal.