发明名称 |
SENSITIVITY AND SIGNAL-TO-NOISE RATIO OF PLURALITY OF PARALLEL PICKUP CONSTITUTING PIEZOELECTRIC CONVERTER, IMPROVING METHOD AND DEVICE |
摘要 |
A method and device are provided for improving the sensitivity and signal to noise ratio of transducers including several piezo-electric sensors interconnected in parallel to the input of an electric charge amplifier, said process consisting essentially in reducing the electric capacity of the combination of parallel sensors at the input of the amplifier so as to reduce the amplification gain applied to the noise without changing that which is applied to the signals picked up. This operation is achieved by means of an impedance transformer or else by means of at least one charge transfer capacitor connected by at least one switch alternately to the sensors and to the capacitor of the amplifier. |
申请公布号 |
JPS6326593(A) |
申请公布日期 |
1988.02.04 |
申请号 |
JP19870156390 |
申请日期 |
1987.06.23 |
申请人 |
INST FR PETROLE |
发明人 |
KUROODO BOODOSERU;TEIERII GOTEIEERU |
分类号 |
H01L23/00;G01V1/16;G01V1/20;H03F3/70;H04R3/00 |
主分类号 |
H01L23/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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