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81. 发明专利

JP2004064673A Class d amplifier 有权
公开(公告)号：JP2004064673A
公开(公告)日：2004-02-26
申请号：JP2002223606
申请日：2002-07-31
申请人： Yamaha Corp , ヤマハ株式会社
发明人： TANAKA TAISHIN , NORO MASAO
IPC分类号： H04R3/00 , H03F1/52 , H03F3/185 , H03F3/187 , H03F3/217 , H03F3/393 , H03K17/08 , H03K17/695
CPC分类号： H03F3/2171 , H03F3/185 , H03F3/393
摘要： PROBLEM TO BE SOLVED: To provide a class D amplifier wherein both power MOS transistors constituting the output stage can be controlled to an off state when an excess output current is generated.
SOLUTION: Detecting circuits (REFH, CM11, LA1, TN1, RN1) which detect an excess current flowing in the power MOS transistor 401 of the output stage and output a first signal (ITN1) are arranged in a first driving circuit 303H of a high side driver side. Detecting circuits (REFL, CM21, LA2, TN2, RN2) which detect an excess current flowing in the power MOS transistor 402 of the output stage and output a second signal (ITN2) are arranged in a driving circuit 303L of a low side driver side. The first signal (ITN1) is converted to a third signal (ITT2) wherein a negative power source VPP- is made a reference by using a signal conversion circuit. The third signal is added to the second signal. In response to the added signal, a pulse signal to be input in the driving circuits 303H, 303L is obstructed.
COPYRIGHT: (C)2004,JPO

82. 发明专利

JPS59165504A Ac coupling circuit 失效
标题翻译：交流耦合电路
公开(公告)号：JPS59165504A
公开(公告)日：1984-09-18
申请号：JP3738083
申请日：1983-03-09
申请人： Hitachi Ltd
发明人： MATSUI KAZUMASA , NAGASAWA KOUICHI , MEGURO SATOSHI
IPC分类号： H03F1/00 , H03F3/393
CPC分类号： H03F3/393
摘要： PURPOSE:To shorten the power supply time by applying a DC bias with a variable resitance which can control its conduction with use of an intrinsic semiconductor itself as an FET and lowering the resistance value when the power is supplied. CONSTITUTION:The output of a circuit 1 of a preceding stage consisting of a switch S1 which is closed when the power is supplied, a signal power supply ei and a bias level power supply Ei is applied to a circuit 4 of a succeeding stage via a capacitor 2. A variable resistance 13 consisting of an FET of an intrinsic semiconductor is connected to the capacitor 2 at the side of the circuit 4. Then a pulse generator 23 is connected to the gate of the FET, and a pulse is generated when the power is supplied. Thus the FET conducts. Therefore the output of an AC coupling circuit, i.e. the input level of the circuit 4 is immediately set at an earth level to perform a normal operation.
摘要翻译：目的：通过施加可变电阻的直流偏置来缩短电源时间，可以通过使用本征半导体本身作为FET来控制其导通，并在供电时降低电阻值。构成：由供电时闭合的开关S1，信号电源ei和偏置电平电源Ei构成的前级的电路1的输出经由a的后级施加到后级的电路4 由本征半导体的FET构成的可变电阻13与电路4侧的电容器2连接。然后，脉冲发生器23连接到FET的栅极，当脉冲发生器23 供电。因此FET导通。因此，AC耦合电路的输出，即电路4的输入电平立即设置在地电平以执行正常操作。

83. 发明专利

JPS5435660A AMPLIFIER 失效
公开(公告)号：JPS5435660A
公开(公告)日：1979-03-15
申请号：JP10109477
申请日：1977-08-25
申请人： TOKYO SHIBAURA ELECTRIC CO
发明人： ARAKI TAKESHI
IPC分类号： H03F3/181 , H03F3/393
摘要： PURPOSE:To make a high-precision absolute value amplification possible throughout all ranges of the voltage and make a conversion of various waveforms simple by using FET switches for positive/negative switching of the input.

84. 实用新型

JPS52106792U 失效
公开(公告)号：JPS52106792U
公开(公告)日：1977-08-13
申请号：JP382177
申请日：1977-01-18
IPC分类号： H03K7/02 , G01D5/25 , G01R15/00 , G05B21/02 , H03F3/38 , H03F3/393

85. 发明专利

JPS51117074A DETECTOR OF MICRO D*C* SIGNAL VOLTAGE 失效
公开(公告)号：JPS51117074A
公开(公告)日：1976-10-14
申请号：JP4167575
申请日：1975-04-04
申请人： KEISOKUKI KOGYO
发明人： YAMAGAMI YASUTAKA
IPC分类号： G01R19/00 , G01R19/18 , H03F3/38 , H03F3/393
摘要： PURPOSE:A device to detect D.C. signal voltage using low cost D.C.-A.C. converter, amplifier, Ic and selector.

86. 发明专利

JPS50159235A 失效
公开(公告)号：JPS50159235A
公开(公告)日：1975-12-23
申请号：JP2452075
申请日：1975-03-01
IPC分类号： H03F3/38 , H03F3/393 , H03K3/023 , H03M1/00

87. 发明专利

JPS48101064A 失效
公开(公告)号：JPS48101064A
公开(公告)日：1973-12-20
申请号：JP3176072
申请日：1972-03-31
IPC分类号： H03F3/38 , H03F3/393

88. 实用新型

JPS482639U 失效
公开(公告)号：JPS482639U
公开(公告)日：1973-01-12
申请号：JP4505571
申请日：1971-05-31
IPC分类号： H03F3/38 , G05B11/06 , G05D3/00 , G05D3/12 , H03F1/26 , H03F3/393 , H04L1/00

89. 实用新型

JPS4737083Y1 失效
公开(公告)号：JPS4737083Y1
公开(公告)日：1972-11-09
申请号：JP2984066
申请日：1966-04-01
IPC分类号： H03F3/38 , H03F3/393 , H03K17/60 , H03K17/687 , H03K19/08 , H04L27/04

90. 实用新型

JPS4632724Y1 失效
公开(公告)号：JPS4632724Y1
公开(公告)日：1971-11-12
申请号：JP2038168
申请日：1968-03-15
IPC分类号： H03F3/393

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