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. 17, 1981
Filed:
Oct. 30, 1978
Kyuichi Hareyama, Tokyo, JP;
Nippon Electric Co., Ltd., Tokyo, JP;
Abstract
A current source circuit particularly adapted for use with an analog-to-digital converter having automatic scale adjustment. A first current source produces a fixed reference current of a first value in accordance with the scale adjustment while a second current source produces a second current of which the value is controlled by the output of a differential amplifier coupled to the control input of the second current source. A detector circuit is provided for determining the difference between the second current value and the reference value. The detected difference value is fed back to a control input of the amplifier to make the second current value equal to the reference value by reducing the difference.