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:
Apr. 24, 2007
Filed:
Nov. 26, 2003
Kazuo Mizuno, Nagoya, JP;
Ryu Kimura, Chita-gun, JP;
Yoshiyuki Kago, Nishio, JP;
Yukiomi Tanaka, Takahama, JP;
Kazuhiko Endo, Anjo, JP;
Hisanori Uda, Nagoya, JP;
Hiroaki Hayashi, Nagoya, JP;
Kazuo Mizuno, Nagoya, JP;
Ryu Kimura, Chita-gun, JP;
Yoshiyuki Kago, Nishio, JP;
Yukiomi Tanaka, Takahama, JP;
Kazuhiko Endo, Anjo, JP;
Hisanori Uda, Nagoya, JP;
Hiroaki Hayashi, Nagoya, JP;
DENSO Corporation, Kariya, JP;
Abstract
A start signal output circuit having an RF/DC conversion circuit to which radio frequency power (RF) of specified frequency is inputted and from which a direct current potential (DC) is outputted, comprises a detection/amplification circuitwhich includes a voltage doubler wave-detector circuitconfigured including a sensing diode Q(Tr) for sensing the RF power, a differential amplifier including differential pair transistors Trand Tr, and a current mirror circuit. A base current of one Trof the differential pair transistors is brought into substantial agreement with a DC component of a current flowing through the sensing diode Q(Tr). A total of currents flowing through the differential pair transistors Trand Tris regulated to a substantially constant value by the current mirror circuit. Thus, the start signal output circuit which is small in size, high in sensitivity and low in power consumption can be realized.