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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.:

US 9350591 B1

PDFFull Text
Date of Patent:
May. 24, 2016

Filed:

Mar. 05, 2015

Method and system for down-converting an electromagnetic signal

Applicant:

Parkervision, Inc., Jacksonville, FL (US);

Inventors:

David F. Sorrells, Jacksonville, FL (US);

Michael J. Bultman, Jacksonville, FL (US);

Robert W. Cook, Switzerland, FL (US);

Richard C. Looke, Jacksonville, FL (US);

Charley D. Moses, Jacksonville, FL (US);

Gregory S. Rawlins, Lake Mary, FL (US);

Michael W. Rawlins, Lake Mary, FL (US);

Assignee:

ParkerVision, Inc., Jacksonville, FL (US);

Attorney:

Workman Nydegger

Primary Examiner:

Young T Tse

Int. Cl.
CPC ...
H03C 1/62 (2006.01); H03D 7/00 (2006.01); H04B 1/00 (2006.01); H04B 1/16 (2006.01); H04B 1/28 (2006.01); H04B 7/12 (2006.01); H04L 25/08 (2006.01); H04L 27/00 (2006.01); H04L 27/06 (2006.01); H04L 27/12 (2006.01); H04L 27/14 (2006.01); H04L 27/38 (2006.01); H04L 27/148 (2006.01); H04L 27/156 (2006.01); H03D 7/14 (2006.01); H04L 27/26 (2006.01);
U.S. Cl.
CPC ...
H04L 27/3881 (2013.01); H03C 1/62 (2013.01); H03D 7/00 (2013.01); H03D 7/1441 (2013.01); H03D 7/1475 (2013.01); H04B 1/0025 (2013.01); H04B 1/16 (2013.01); H04B 1/28 (2013.01); H04B 7/12 (2013.01); H04L 25/08 (2013.01); H04L 27/00 (2013.01); H04L 27/06 (2013.01); H04L 27/12 (2013.01); H04L 27/14 (2013.01); H04L 27/148 (2013.01); H04L 27/156 (2013.01); H04L 27/2672 (2013.01);
Abstract

Methods for down converting a modulated carrier signal to a demodulated baseband signal are described herein. The method requires that a first portion of energy is transferred from the modulated carrier signal, and stored at a first storage device when a first switch is on. At least some of the energy stored in the first storage device is discharged when the first switch is off. The method further comprises transferring a second portion of energy from the modulated carrier signal, storing at a second storage device the second portion of transferred energy when a second switch is on, and discharging at least some of the energy stored in the second storage device when the second switch is off. A down-converted in-phase baseband signal portion is generated from the energy accumulated in the first storage device while both the charging and the discharging occurs, and a down-converted inverted in-phase baseband signal portion is generated from the energy accumulated in the second storage device while both the charging and the discharging occurs, and the two portions are combined with a first differential amplifier circuit to form a down-converted differential in-phase baseband signal.

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