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. 24, 1997
Filed:
Dec. 21, 1994
Nobutaka Amano, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a regulated power supply circuit, a 'J characteristic curve' is obtained between an output current and an output voltage. Moreover, the output current is minimized in a grounded state in which the output terminal is grounded to minimize heat dissipation so as to facilitate circuit integration. Between the input and output terminals, there are connected an output-stage transistor and a current sense resistor in series. A voltage sense circuit senses voltage between an output terminal of the transistor and a ground terminal. The current sense circuit senses the output current by the current sense resistor. The transistor has a base terminal connected to output terminals of the voltage and current sense circuits, respectively. In this configuration, when the output terminal is grounded, the output current is set independently of a current value sensed at occurrence of an excess current. This consequently lowers the power consumption of the regulated voltage circuit in the grounded state.