Biometric information transmitter

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.

Dependencies are inferred from the claim text.