Horology: time measuring systems or devices – Plural timepiece system or system device – With wireless synchronization
Reexamination Certificate
2006-10-25
2010-12-07
Miska, Vit W (Department: 2833)
Horology: time measuring systems or devices
Plural timepiece system or system device
With wireless synchronization
C343S725000
Reexamination Certificate
active
07848180
ABSTRACT:
The antenna circuit42includes: an MI magnetic sensor having an electric property which changes in accordance with a magnetic field change; a radio-frequency signal generator S1to apply a radio-frequency signal to the MI magnetic sensor Z1; an inverter92to invert the radio-frequency signal; an adder94to reduce the radio-frequency signal by adding the inverted signal with a received signal obtained by the MI magnetic sensor Z1; and detectors D1and D2to detect the received signal in which the radio-frequency signal has been reduced. Further, included are a resonant circuit620including a magnetic sensor circuit Z1and a resonant element such as quartz to retrieve a magnetic field change of a resonant frequency from a detected magnetic field change; and a resistance R0. Further, the magnetic sensor circuit610includes a magnetoresistance element612, a DC power source611and a resistance R1.
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Nomura Keiichi
Someya Kaoru
Casio Computer Co. Ltd.
Holtz Holtz Goodman & Chick PC
Kayes Sean
Miska Vit W
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