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:
Oct. 28, 2003
Filed:
Jul. 13, 2000
Takahide Kitahara, Kariya, JP;
Mitsugi Ohtsuka, Kariya, JP;
Noritoshi Furuta, Okazaki, JP;
Fumio Asakura, Okazaki, JP;
Denso Corporation, Kariya, JP;
Abstract
A synchronization circuit modulates a data signal with an amplitude shift keying (ASK) modulation method using an ASK modulation signal to output a modulated signal under the condition that the ASK modulation system and data signal are synchronized with each other. A drive circuit executes a push-pull operation based on the modulated signal and a resonance circuit resonates, under the push-pull operation of the drive circuit, to transmit a transmission signal in a radio wave. The synchronous signal controls a switching device to cut off a connection between the resonance circuit and the ground in synchronization with the modulated signal. Thereby, the transmission signal is generated sharply in the signal transmitter.