发明名称 |
ELECTROSTATIC MICROPHONE |
摘要 |
FIELD: pressure sensors for various automatic process-control devices. SUBSTANCE: microphone has two DC voltage supplies feeding two field-effect transistors through limiting resistors connected in parallel with pressure-sensing capacitors. Sources of field-effect transistors are interconnected and connected in parallel with series circuit set up of passive inductance coil and capacitor. Pressure acting on pressure-sensing capacitors changes its value resulting in variation in capacitive component of impedance at drain-drain terminals of field-effect transistors which, in its turn, changes resonant frequency of oscillatory circuit. EFFECT: improved design. 1 dwg øøø1
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申请公布号 |
RU2104619(C1) |
申请公布日期 |
1998.02.10 |
申请号 |
RU19950114269 |
申请日期 |
1995.08.08 |
申请人 |
VINNITSKIJ GOSUDARSTVENNYJ TEKHNICHESKIJ UNIVERSITET |
发明人 |
OSADCHUK VLADIMIR STEPANOVICH;OSADCHUK ELENA VLADIMIROVNA;OSADCHUK ALEKSANDR VLADIMIROVICH;OSADCHUK VLADIMIR STEPANOVICH;OSADCHUK ELENA VLADIMIROVNA;OSADCHUK ALEKSANDR VLADIMIROVICH |
分类号 |
H04R19/04;(IPC1-7):H04R19/04 |
主分类号 |
H04R19/04 |
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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