发明名称 |
IMPEDANCE CONVERSION CIRCUIT OF CONDENSER MICROPHONE |
摘要 |
Provided is an impedance conversion circuit of a condenser microphone which includes a first electron tube operated in grounded-cathode mode to whose grid an output signal from a condenser microphone unit is inputted, and from whose plate a signal is outputted, a first emitter-follower circuit configured to receive a signal based on a plate output of the first electron tube and amplify a current, and a first feedback element configured to transmit a feedback signal from an emitter of a transistor configuring the first emitter-follower circuit to the grid of the first electron tube. And the impedance conversion circuit can achieve a wide dynamic range while using a voltage amplifier circuit with an electron tube at an initial stage |
申请公布号 |
US2017099544(A1) |
申请公布日期 |
2017.04.06 |
申请号 |
US201615229697 |
申请日期 |
2016.08.05 |
申请人 |
KABUSHIKI KAISHA AUDIO-TECHNICA |
发明人 |
AKINO Hiroshi |
分类号 |
H04R3/06 |
主分类号 |
H04R3/06 |
代理机构 |
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代理人 |
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主权项 |
1. An impedance conversion circuit of a condenser microphone comprising:
a first electron tube operated in grounded-cathode mode to whose grid an output signal from a condenser microphone unit is inputted, and from whose plate a signal is outputted; a first emitter-follower circuit configured to receive a signal based on a plate output of the first electron tube and amplify a current; and a first feedback element configured to transmit a feedback signal from an emitter of a transistor configuring the first emitter-follower circuit to the grid of the first electron tube. |
地址 |
Tokyo JP |