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. 20, 2001
Filed:
Dec. 02, 1999
Pioneer Corporation, Tokyo, JP;
Abstract
A step-up power supply circuit is provided with a diode D,to which a predetermined voltage Vcc is applied from a power supply,a capacitor C,connected to the diode D,, a diode D,connected to a joint point between the diode D,and the capacitor C,,and also a capacitor C,connected to the diode D,A trapezoidal wave signal S,produced by a triangular wave generating circuit,an amplifier,and a drive unit,is applied to the capacitor C,so as to turn ON/OFF the diodes D,and D,As a result, a step-up voltage HVcc approximately two times higher than the voltage Vcc is produced across the capacitor C,. Amplifiers AM,to AM,are operated under the step-up voltage HVcc produced from the step-up power supply circuit with employment of this arrangement, and the step-up voltage HVcc is judged by a judging circuit,As a result of this judgement, amplification factors of amplifiers AM,to AM,are automatically and variably adjusted.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile