Invention Grant
US07929716B2 Voltage supply circuit, power supply circuit, microphone unit using the same, and microphone unit sensitivity adjustment method
失效
电源电路，电源电路，麦克风单元使用相同，麦克风单元灵敏度调整方式
- Patent Title: Voltage supply circuit, power supply circuit, microphone unit using the same, and microphone unit sensitivity adjustment method
- Patent Title (中): 电源电路，电源电路，麦克风单元使用相同，麦克风单元灵敏度调整方式
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Application No.: US11325303Application Date: 2006-01-05
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Publication No.: US07929716B2Publication Date: 2011-04-19
- Inventor: Fumiyuki Niwa , Hiroshige Kinoshita , Masayuki Ida
- Applicant: Fumiyuki Niwa , Hiroshige Kinoshita , Masayuki Ida
- Applicant Address: JP Kanagawa
- Assignee: Renesas Electronics Corporation
- Current Assignee: Renesas Electronics Corporation
- Current Assignee Address: JP Kanagawa
- Agency: Sughrue Mion, PLLC
- Priority: JP2005-001380 20050106; JP2005-285002 20050929
- Main IPC: H04R3/00
- IPC: H04R3/00
Abstract:
A voltage supply circuit includes a power supply booster, an amplifier operating with a voltage generated by the power supply booster as a power supply voltage and supplying a bias voltage to a sensor, and an output voltage setting part including a feedback resistor for the amplifier. The feedback resistor has resistance determined according to a set value of a bias voltage of the sensor.
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