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. 10, 1984
Filed:
Dec. 24, 1981
Applicant:
Inventors:
Michael D Smith, Austin, TX (US);
James A Miller, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330107 ;
Abstract
A charge pump amplifier useful for providing precise gain in integrated circuits is described. The amplifier uses an operational amplifier with a capacitive feedback to accumulate successive charges applied to the input of the operational amplifier by a switched-capacitor input. If the capacitors are of equal size, the gain of the amplifier is a function of the ratio of the frequency of the switched capacitor input and the frequency of discharge of the feedback capacitor.