发明申请
US20070170946A1 Pilot signal detection circuit and semiconductor integrated circuit equipping the circuit
审中-公开
导频信号检测电路和半导体集成电路配备电路
- 专利标题： Pilot signal detection circuit and semiconductor integrated circuit equipping the circuit
- 专利标题（中）： 导频信号检测电路和半导体集成电路配备电路
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申请号： US10591880申请日： 2005-02-22
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公开(公告)号： US20070170946A1公开(公告)日： 2007-07-26
- 发明人: Masaaki Kato , Hiroshi Miyagi
- 申请人： Masaaki Kato , Hiroshi Miyagi
- 申请人地址： JP Niigata 943-0834 JP Aichi
- 专利权人： Niigata Seimitsu Co., Ltd.,Kabushiki Kaisha Toyota Jidoshokki
- 当前专利权人： Niigata Seimitsu Co., Ltd.,Kabushiki Kaisha Toyota Jidoshokki
- 当前专利权人地址： JP Niigata 943-0834 JP Aichi
- 优先权： JP2004-066148 20040309
- 国际申请： PCT/JP05/02808 WO 20050222
- 主分类号： G01R31/26
- IPC分类号： G01R31/26
摘要：
The purpose of the present invention is to improve a detection accuracy of a pilot signal detection circuit. A pilot detection signal voltage is input to a differential amplifier circuit 16 and a reference voltage generated by a reference signal generation circuit 17 is input to a differential amplifier circuit 19. A pilot signal is compared with the reference voltage by the differential amplifier circuits 16 and 19. Output currents of the differential amplifier circuits 16 and 19 are converted into voltages by a current-to-voltage conversion circuit 21. And an input to the current-to-voltage conversion circuit 21 is fed back with a voltage proportionate with an offset voltage of the circuit and the offset voltage of the pilot signal detection circuit is cancelled.
信息查询
