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:
Mar. 13, 2001
Filed:
Oct. 17, 1995
Yukio Yasuda, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A voltage divider circuit is connected between the output terminals of a constant-voltage power supply outputting a constant voltage. A constant-current source varies linearly, relative to temperature, the current level flowing to or from the voltage divider junction of the voltage divider circuit. The constant-current source comprises a first transistor and a second transistor connected to a current mirror circuit, and a resistor connected between the ground and the emitter of the second transistor. The base of the current extracting transistor is connected to the bases of the first transistor and the second transistor, and the collector and emitter are connected between the respective voltage divider junction and ground to obtain a current from the voltage divider junction. A current proportional to temperatures and inversely proportional to the value of the resistor can thereby be obtained from the voltage divider junction.