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, 1980
Filed:
Jan. 27, 1978
Applicant:
Inventors:
Thomas P Redfern, San Jose, CA (US);
Joseph J Connolly, San Jose, CA (US);
Thomas M Frederiksen, San Jose, CA (US);
Assignee:
National Semiconductor Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307355 ; 307240 ; 307243 ; 307251 ; 307357 ;
Abstract
A high-gain, capacitor-coupled, chopper-stabilized, direct-current, voltage amplifier is capacitor coupled to a plurality of input switch pairs, each of which alternately couples one of a pair of input terminals to the amplifier. Thus, a voltage comparator results which has a plurality of pairs of inverting and non-inverting inputs. The relative contribution of the inputs can be weighted by ratioing the coupling capacitors of the switch pairs.