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:
Apr. 25, 2000
Filed:
Sep. 17, 1998
Applicant:
Inventors:
Hisao Katoh, Tokyo, JP;
Takeyasu Nakai, Tokyo, JP;
Assignees:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Mitsubishi Electric Engineering Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03L / ; H03L / ;
U.S. Cl.
CPC ...
331 27 ; 331 34 ; 331 57 ;
Abstract
A voltage controlled ring oscillator has a current control circuit and an odd number of inverter circuits. Each inverter circuit has a current charge preventing circuit connected between a ground voltage and a connection node located between a current source transistor and a complementary transistor circuit and a current discharge preventing circuit connected between a high voltage power source and a connection node located between a current source transistor and a complementary transistor circuit.