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:
Jun. 28, 1988
Filed:
Jun. 16, 1986
Applicant:
Inventors:
Bruce B Lusignan, Palo Alto, CA (US);
JameBond Kuo, Stanford, CA (US);
Assignee:
Stanford University, Stanford, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06G / ; H03B / ; A03K / ;
U.S. Cl.
CPC ...
328158 ; 328167 ; 328160 ; 328127 ; 307529 ; 307520 ;
Abstract
An analog function generator useful in providing a variety of functions for analog signal processing applications includes a pulse width modulator and a switched capacitor operational amplifier. Capacitors in the input of the operational amplifier and in the feedback loop of the operational amplifier are selectively switched by the output of the modulator to create output voltages of the amplifier that are polynomial, logarithmic or exponential functions of the input voltages to the amplifier and pulse width modulator.