Title:
TISSUE SENSOR
Document Type and Number:
WIPO Patent Application WO/2014/013813
Kind Code:
A1
Abstract:
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.
Inventors:
TSUCHIMOTO HIROFUMI (JP)
NAKAJI HIROYUKI (JP)
NAKAJI HIROYUKI (JP)
Application Number:
PCT/JP2013/065921
Publication Date:
January 23, 2014
Filing Date:
June 10, 2013
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
A61B5/0245; A61B5/1455
Foreign References:
| JPH0663024A | 1994-03-08 | |||
| JPH0924028A | 1997-01-28 | |||
| JPH06154178A | 1994-06-03 | |||
| JP2007151579A | 2007-06-21 |
Attorney, Agent or Firm:
UEDA KAZUHIRO (JP)
Kazuhiro Ueda (JP)
Kazuhiro Ueda (JP)
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