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. 30, 2013
Filed:
Dec. 31, 2009
Tomoichi Ebata, Machida, JP;
Takayoshi Fujioka, Yokohama, JP;
Takamasa Kawaguchi, Yokohama, JP;
Shinya Yoshihara, Hitachi, JP;
Tomoichi Ebata, Machida, JP;
Takayoshi Fujioka, Yokohama, JP;
Takamasa Kawaguchi, Yokohama, JP;
Shinya Yoshihara, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A GPS signal transmitter configured with a reduced number of components and achieving low cost, space saving, and low power is provided. A GPS signal transmitter of the present invention includes: a crystal oscillator; a carrier wave generator that outputs a first carrier wave and a second carrier wave whose phase is inverted to the phase of the first carrier wave, using a clock output by the crystal oscillator; a microcomputer that is driven with the clock output by the crystal oscillator and outputs a control signal based on a C/A code which is a pseudo random code; a switch that switches over between the first carrier wave and the second carrier wave according to the control signal from the microcomputer and generates a modulation wave; and an antenna that transmits the modulation wave by radio.