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:
Feb. 21, 1989
Filed:
Nov. 24, 1987
Applicant:
Inventors:
Takahiko Tamura, Tokyo, JP;
Hiroyuki Suzuki, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
331111 ; 3311 / ;
Abstract
Oscillation circuit that generates an oscillating signal by charging and discharging a capacitor between two reference voltages employs several constant current sources, with the number of constant current sources that are connected to the capacitor at any one time being controlled so that the oscillation frequency can be changed in a step-wise fashion, whereby the circuitry is relatively simplified compared with known step-wise changing oscillators.