| 摘要 |
<p>Provided is a tissue sensor whereby it is possible to improve an SNR of a detection signal which is received by a photoreceptor element and amplified by an amplifier. A tissue sensor (1) comprises: a drive signal generation unit (57) which generates a pulse-shaped drive signal; a light emitting element (10) which emits light in response to the generated drive signal; a photoreceptor element (20) which outputs a detection signal corresponding to the intensity of received light; an amplifier (30), further comprising first and second computational amplifiers (31, 40), which amplifies the outputted detection signal; an offset signal generation unit (58) and a partial resistor group (32) which generate a pulse-shaped offset voltage which offsets a reference voltage of the first computational amplifier (31) and imparts same to the first computational amplifier (31), when amplifying the detection signal; and a computation unit (56) which processes the detection signal which is amplified by the amplifier (30) and acquires vital signs.</p> |
