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:
Jan. 13, 1987
Filed:
Feb. 03, 1986
Applicant:
Inventors:
Alan L Westwick, Austin, TX (US);
Roger A Whatley, Georgetown, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330-9 ; 328127 ; 330 51 ; 330107 ; 333173 ;
Abstract
A switched capacitor integrator for receiving a single input signal is compensated for parasitic capacitance errors with a minimum amount of circuitry. Although a single-ended amplifier is provided, a differential amplifier input is used which receives equal amounts of parasitic charge to effectively cancel charge errors. The size of the compensating capacitive circuitry may be reduced by making the input parasitic capacitance at one of the inputs proportionately larger so that the noise gain in both positive and negative signal paths remains substantially the same.