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:
Jul. 17, 2001
Filed:
Dec. 14, 1998
Klaas Wortel, Phoenix, AZ (US);
Dennis L. Welty, Mesa, AZ (US);
Motorola, Inc., Scaumburg, IL (US);
Abstract
A mixer (,) has a differential transistor pair (,) receiving first and second reference currents at first and second nodes (,). An RF signal drives the differential transistor pair. A first switching circuit (,) is coupled to the first node and a second switching circuit (,) is coupled to the second node. An LO signal drives the first and second switching circuits. The first and second switching circuit each have first and second outputs that are cross-coupled at output nodes (,) to provide a differential IF output current representative of the sum and difference between the frequency of the RF signal and the frequency of the LO signal.