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:
Oct. 01, 1991
Filed:
Mar. 02, 1989
Don R Holcomb, Scottsdale, AZ (US);
David M Zelinka, Fountain Hills, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A mixer circuit has a first filter connected between a local oscillator terminal and a node and another filter connected between a RF signal terminal and the node. A first circuit path extends from the node through a first diode to a first tuned circuit which can be connected to an input terminal of a balanced-to-unbalanced converter. A second circuit path extends from the node through an oppositely disposed diode which is connected to another tuned circuit which can be connected to another input terminal of the balanced-to-unbalanced converter. The diodes alternately conduct in response to opposite half cycles of the local oscillator signal and the RF signal to generate a variety of mixing components. The tuned circuits preserve the desired output signal and attenuate the other mixing components.