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:
Oct. 10, 1995
Filed:
Aug. 15, 1994
Sony Corporation, Tokyo, JP;
Abstract
In a ring oscillator type VCO in which plural stages of inverter circuits are cascade-connected to each other so as to constitute a positive feedback loop, delay amounts for both a rising edge and a falling edge of an output signal from the inverter circuit are controlled to have the same delay amount by way of a control signal. These delay amounts of the rising edge and the falling edge are controllable in such a manner that the duty ratio of an oscillator output signal is not varied. Each stage of the inverter circuit is arranged by three-stage inverters made of load transistors and driver transistors, and the control voltage is applied to the load transistors of the two adjoining inverters among the three-stage inverters.