DATA COMMUNICATION DEVICE, AIR PRESSURE MONITORING SYSTEM USING THEREOF, AND DATA COMMUNICATION METHOD
First Claim
1. A data communication device comprising:
- an antenna resonance circuit configured to receive a signal in the ASK (Amplitude Shift Keying) format;
a detection circuit configured to demodulate a digital baseband signal based on said reception signal;
an arithmetic processing device configured to detect an appearance time of an edge in said demodulated digital baseband signal based on a preamble part of said reception signal; and
a first switch configured to short-circuit both end of said antenna resonance circuit at first timing in synchronization with said appearance time of said edge.
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Accused Products
Abstract
A data communication device includes: an antenna resonance circuit; a detection circuit; an arithmetic processing device; and a first switch. The antenna resonance circuit receives a signal in the ASK (Amplitude Shift Keying) format. The detection circuit demodulates a digital baseband signal based on the reception signal. The arithmetic processing device detects an appearance time of an edge in the demodulated digital baseband signal based on a preamble part of the reception signal. The first switch short-circuits both end of the antenna resonance circuit at first timing in synchronization with the appearance time of the edge.
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Citations
18 Claims
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1. A data communication device comprising:
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an antenna resonance circuit configured to receive a signal in the ASK (Amplitude Shift Keying) format; a detection circuit configured to demodulate a digital baseband signal based on said reception signal; an arithmetic processing device configured to detect an appearance time of an edge in said demodulated digital baseband signal based on a preamble part of said reception signal; and a first switch configured to short-circuit both end of said antenna resonance circuit at first timing in synchronization with said appearance time of said edge. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An air pressure monitoring system comprising:
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a data communication device; and a sensor initiator configured to transmit a signal in the ASK (Amplitude Shift Keying) format to said data communication device, wherein said data communication device includes; an antenna resonance circuit configured to receive said signal in the ASK format, a detection circuit configured to demodulate a digital baseband signal based on said reception signal, an arithmetic processing device configured to detect an appearance time of an edge in said demodulated digital baseband signal based on a preamble part of said reception signal, and a first switch configured to short-circuit both end, of said antenna resonance circuit at first timing in synchronization with said appearance time of said edge, wherein an air pressure sensor starts to measure air pressure of a tire in response to data based on said demodulated digital baseband signal. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A data communication method comprising:
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receiving a signal in the ASK (Amplitude Shift Keying) format by an antenna resonance circuit; demodulating a digital baseband signal based on said reception signal; detecting an appearance time of an edge in said demodulated digital baseband signal based on a preamble part of said reception signal; and short-circuiting both end of said antenna resonance circuit at first timing in synchronization with said appearance time of said edge. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification