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:
Mar. 04, 2003
Filed:
Dec. 13, 2001
Theodore P. Fazioli, Salem, NH (US);
Ron Gatzke, Lexington, MA (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A Doppler receiver has a wide dynamic range and operates in a differential mode. In one embodiment, the invention is a wide dynamic range continuous wave (CW) Doppler receiver, comprising a differential fixed frequency output mixer configured to receive a radio frequency (RF) input signal and supply a differential signal output; a differential fixed frequency bandpass filter coupled to the differential fixed frequency output mixer and configured to provide a fixed frequency output; an in-phase mixer and a quadrature-phase mixer, each configured to receive a differential signal output of the differential fixed frequency bandpass filter; at least one in-phase filter configured to receive the output of the in-phase mixer and supply a filtered in-phase signal; at least one quadrature-phase filter configured to receive the output of the quadrature-phase mixer and supply a filtered quadrature-phase signal; and an analog-to-digital converter configured to receive the filtered in-phase signal and the filtered quadrature-phase signal and supply a corresponding in-phase digital output and a corresponding quadrature-phase digital output, the outputs of the analog-to-digital converter supplied to a memory element.