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:
Apr. 15, 2014
Filed:
Apr. 03, 2012
Tony R. Larson, Tucson, AZ (US);
Srikanth Vellore Avadhanam Ramamurthy, Tucson, AZ (US);
Dimitar T. Trifonov, Vail, AZ (US);
Tony R. Larson, Tucson, AZ (US);
Srikanth Vellore Avadhanam Ramamurthy, Tucson, AZ (US);
Dimitar T. Trifonov, Vail, AZ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Multiplier circuitry includes first multiplier circuit including a first transistor having an emitter coupled to a first conductor, a base coupled to a second conductor, and a collector coupled to a third conductor, a second transistor having an emitter coupled to the first conductor, a base coupled to a fourth conductor, and a collector coupled to a fifth conductor, a third transistor having an emitter coupled to the second conductor and a base and collector coupled to a supply voltage, and a fourth transistor having an emitter coupled to the fourth conductor and a base and collector coupled to the supply voltage. Chopper includes a first switch to provide a chopped differential signal between the second and fourth conductors and a second switch for un-chopping a first differential output signal produced between the third and fifth conductors to provide an un-chopped differential output signal between the third and fifth conductors.