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. 13, 2016
Filed:
Sep. 30, 2009
Russell D. Wyse, Center Point, IA (US);
Mark A. Willi, Marion, IA (US);
Russell D. Wyse, Center Point, IA (US);
Mark A. Willi, Marion, IA (US);
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Abstract
An active ring mixer circuit for use in a receive or transmit channel of an RF radio. The circuit comprises plural transistor pairs arranged in a ring and biased into an active or saturation region. A first input is adapted to receive an RF signal. The first input is electrically combined with the plural transistor pairs to provide negative feedback to the plural transistor pairs. A second input electrically combined with the plural transistor pairs is adapted to receive a local oscillator signal. An output of the mixer is adapted to provide a mixed signal from the plural transistor pairs. Advantageously, the mixer circuit induces little low frequency spurs that may interfere with radio operation and has significantly reduced power consumption, lower noise figure, and good balance.