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:
May. 24, 2016
Filed:
Jan. 13, 2014
Atmel Corporation, San Jose, CA (US);
Marco Schwarzmueller, Heilbronn, DE;
Atmel Corporation, San Jose, CA (US);
Abstract
In certain embodiments, a circuit for image frequency rejection includes an analog adder-amplifier that has a transistor pair. The adder-amplifier is configured to receive a plurality of downmixed or upmixed in-phase and quadrature-phase signals, and to add an in-phase signal and a quadrature-phase signal applied at control inputs of both transistors of the transistor pair. Both transistors of the transistor pair are connectable to a same load resistor for addition of the in-phase signal and the quadrature-phase signal applied at the control inputs of both transistors. The adder-amplifier is configured to output, based on adding the in-phase signal and the quadrature-phase signal applied at the control inputs of both transistors of the transistor pair, one or more summed signals.