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:
Jun. 03, 1997
Filed:
Oct. 04, 1995
Koichi Murakami, Yokohama, JP;
Motohiro Oomichi, Fujisawa, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In a current detector circuit wherein the sense current flowing through a sense transistor for sensing part of the main current flowing through a main element transistor is flowed through the detection resistor to cause the bipolar or MOS control transistor to detect the voltage drop across the detection resistor, a compensation diode connected to the base or gate of the control transistor and the emitter of the sense transistor and a forward bias generation resistor element for generating a forward bias applied to the diode for a time interval during which the main current flows are arranged. When a sense current flowing through a sense element for sensing part of a main current flowing through a main element is to be flowed through a detection resistor to cause a control transistor to detect a voltage drop across through the detection resistor, the temperature dependence of a threshold voltage between the base and emitter of the control transistor is compensated for, and an output current is detected with an almost constant current level during an operation.