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. 08, 2003
Filed:
Nov. 09, 2001
Uday Dasgupta, Singapore, SG;
Wooi Gan Yeoh, Singapore, SG;
Other;
Abstract
A high frequency differential amplifier with a circuit topology which ensures that bias currents of the high transconductance differential transistors with minimum channel length are exactly equal, i.e., each differential transistor carries exactly half of the total current I of the differential amplifier. This is achieved by coupling each differential transistor via its own current source to the reference potential. To insure a good match between the current sources, the current source devices are made with long channel lengths. Impedances are coupled between the junctions of each differential transistor pair and its current source to insure good AC gain. For the variable gain differential amplifier the spread in the gain control characteristics is reduced by making the aspect ratio of the first pair of differential transistors larger than that of the second pair of differential transistors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile