Biometric information transmitter
First Claim
1. A biometric information transmitter comprising:
- biometric signal detecting means for detecting a biometric signal and outputting a corresponding biometric detecting signal;
driving means for driving an antenna circuit by a drive signal;
the antenna circuit for outputting a biometric information signal in correspondence with the biometric detecting signal by wireless by being driven by the driving means; and
controlling means for controlling the driving means to drive the antenna circuit;
wherein the controlling means controls the driving means to drive the antenna circuit when a signal level of the drive signal is lowered.
1 Assignment
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Accused Products
Abstract
To reduce power consumption in transmitting biometric information signal by wireless. A heart beat detecting circuit amplifies a heart beat signal from an electrode and outputs a biometric detecting signal A having a predetermined time width in synchronism with heart beat of the heart. A voltage comparator, a pulse counting circuit and a control signal generating circuit control an antenna driving circuit such that an antenna circuit is driven when a signal level of a drive signal for driving the antenna circuit by the antenna driving circuit is lowered during a time period of outputting the biometric detecting signal A. The antenna driving circuit excites a resonance circuit comprising a coil L and a capacitor C for an antenna of the antenna circuit in response to the control. A biometric information signal of a burst signal type in correspondence with the heart beat signal is outputted by wireless from the antenna coil L, thereby, power consumption in transmitting by wireless is reduced.
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Citations
6 Claims
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1. A biometric information transmitter comprising:
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biometric signal detecting means for detecting a biometric signal and outputting a corresponding biometric detecting signal; driving means for driving an antenna circuit by a drive signal; the antenna circuit for outputting a biometric information signal in correspondence with the biometric detecting signal by wireless by being driven by the driving means; and controlling means for controlling the driving means to drive the antenna circuit; wherein the controlling means controls the driving means to drive the antenna circuit when a signal level of the drive signal is lowered. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification