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. 30, 2013
Filed:
May. 07, 2012
Joel C. Beckwith, Tokyo, JP;
Dejan Mijuskovic, Tournefeuille, FR;
Joel C. Beckwith, Tokyo, JP;
Dejan Mijuskovic, Tournefeuille, FR;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A low pass filter circuit includes an amplifier having a single-ended output. A first line and a second line are arranged to receive a differential signal. A first switch selectively connects the first line to a first input of the amplifier in a first cycle of operation having a first observation window. A second switch selectively connects the second line to a second input of the amplifier in a second cycle of operation having a second observation window that is at least partially coincident with the first observation window. A signal measuring stage that is supplied with a modulated input signal generates the differential signal. The signal measuring state has an input switch to reverse a polarity of the differential signal applied to the first and second lines of the low pass filter circuit.