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:
May. 13, 1997
Filed:
Jan. 04, 1996
Myung-Jun Choe, Puchon, KR;
Byeong-Whee Yun, Puchon-si, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A voltage-to-current converter makes it possible to control conversion of a voltage to a current by considering the size of a transistor irrespective of supply voltage, input voltage, and fabrication conditions. It includes an operational amplifier for receiving a constant-voltage source to a noninverting terminal, and amplifying the voltage; a converting circuit for converting the input voltage to current after receiving the output voltage from the operational amplifier as an input; a current mirror for receiving the output current from the converting circuit as an input, and enabling two transistors of the current mirror to flow the same current; an electric potential holding circuit for maintaining two electric potentials which are applied on respective drain terminals of the two transistors of the current mirror to be equal; and an output current mirror for constantly maintaining current flowing out from the current mirror, which biases the electric potential of a drain terminal of the second transistor used in the current mirror with a predetermined value, and flows a constant voltage to the constant-current source output terminal.