CLASS D AMPLIFIER

申请(专利)号： JP20040226928

专利号： JP2006050151A 主分类号： H03F3/217

申请权利人： PIONEER

ELECTRONIC CORP 公开国代码： JP 优先权国家： JP

摘 要：

<P>PROBLEM TO BE SOLVED: To provide a class D amplifier wherein a transistor pair of a complementary

symmetry is driven by a drive signal with a proper bias and an overcurrent flowing in the transistor pair is detected. <P>SOLUTION: A differential amplifier 103a calculates a difference between an input signal Pa and a power supply voltage +VL being a prescribed voltage, produces a difference signal Psa whose level is shifted toward a power supply voltage +VH by a resistor R2a acting like a pull-up function, an amplifier 104a amplifies the signal Psa to produce a drive signal Pga in matching with a bias of a transistor FETa. Further, similarly an amplifier 104b produces a drive signal Pgb. A current mirror circuit 101a detects a voltage drop VRLa caused across a resistor RLa connected between a transistor FETa and the power supply voltage +VH, and a current mirror circuit 101b detects a voltage drop VRLb caused

申请日： 2004-08-03 公开公告日： 2006-02-16

分类号： H03F3/217;

H03K17/08; H03K17/695 发明设计人： OZAWA AKIO;

KUDO KAZUYUKI 申请国代码： JP

优先权： 20040803 JP

2004226928

摘 要 附 图：

across a resistor RLb connected between a transistor FETb and the power supply voltage -VH and the presence of the production of an overcurrent is detected by producing currents Ia, Ib

corresponding to the voltage drops VRLa, VRLb. <P>COPYRIGHT: (C)2006,JPO&NCIPI 主权项：

電源電圧に対して相補対称形の第１スイッチング素子と第２スイッチング素子から成るスイッチング素子ペアと、矩形波状の第１入力信号をレベルシフトすることにより前記第１スイッチング素子に供給する駆動信号

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