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. 05, 1993
Filed:
Jun. 24, 1992
Applicant:
Inventor:
Ichiro Kondo, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
331111 ; 331144 ; 331175 ;
Abstract
In an oscillation circuit, the Schmidt circuit generates the control signal of the first level when the charge-discharge voltage inputted from the capacitor shifts to a voltage higher than the first threshold voltage and generates the control signal of the second level when the charge-discharge voltage shifts to a level lower than the second threshold voltage. The switching circuit connects the second current source circuit with the capacitor when the control signal is of the first level and connects the first current source circuit with the capacitor when the control signal is of the second level.