| 发明名称 |
HEAT BEAT MEASURING DEVICE |
| 摘要 |
<p>PURPOSE:To improve measuring accuracy of a heat beat measuring device through which heart beat is detected by a light emitting diode and a phototransistor. CONSTITUTION:An output of the phototransistor 12 of a heart beat sensor and the standard voltage of a standard voltage electric power supply part 18 are differentially amplified by means of an operation amplifier 17 and supplied to the collector C of the phototransistor 12. A load characteristic line of the phototransistor 12 is changed according to the photoreceiving illuminance of the phototransistor 12 and an operation point is kept constantly and a gain variation is suppressed.</p> |
| 申请公布号 |
JPH07308298(A) |
申请公布日期 |
1995.11.28 |
| 申请号 |
JP19940103124 |
申请日期 |
1994.05.17 |
| 申请人 |
MARUTAKA IRYOKI KK |
发明人 |
TSUZUKI TOSHIHIRO;HATANAKA RYUICHI;MATSUSHIMA KAZUO;TSUJIMURA TADASHI |
| 分类号 |
A61B5/0245;(IPC1-7):A61B5/024 |
主分类号 |
A61B5/0245 |
| 代理机构 |
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