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. 22, 1982
Filed:
Mar. 24, 1980
Applicant:
Inventors:
Terence G Cole, Hampshire, GB;
Stuart E Marshall, Hampshire, GB;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3311 / ; 331-8 ; 331 34 ; 3311 / ;
Abstract
Disclosed is an integrated circuit voltage controlled astable multivibrator with external fixed components: resistor RT and capacitor CT. The multivibrator has a center frequency which is a function of: the value of capacitor CT, the amplitude of a constant current Il used to charge and discharge capacitor CT, and a voltage VT. The period timed is proportional to VT/Il where VT is half the voltage swing across capacitor CT. Undesired frequency variations are minimized by generating both current Il and voltage VT in similar matched networks and from the same voltage source so that Il and VT track each other.