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:
Mar. 04, 2003
Filed:
Jul. 21, 2001
John S. Prentice, Palm Bay, FL (US);
Intersil Americas Inc., Irvine, CA (US);
Abstract
A mixer driver circuit including a differential pair, a differential current supply and a switched current sink. The differential pair has a differential input for receiving a differential input signal. The differential current supply provides a differential output and switches in response to switching of the differential pair to provide a differential output current. The switched current sink biases the differential current supply and sinks current to drive the differential output signal. The differential pair may be a resistive-loaded differential pair of transistors biased by a constant current sink. The differential current supply may include a pair of emitter follower buffers. The mixer driver may further include a pair of constant current sinks and a second pair of emitter follower buffers, where the second pair of emitter follower buffers is biased by the pair of constant current sinks and provides a voltage level shifting drive for the switched current sink.