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1. 实用新型

KR810001365Y1 FET 스위치 회로 失效
公开(公告)号：KR810001365Y1
公开(公告)日：1981-09-30
申请号：KR800007499
申请日：1980-11-21
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO
IPC分类号： H03K17/06

2. 发明专利

JPS598412A Power amplification circuit 失效
标题翻译：功率放大电路
公开(公告)号：JPS598412A
公开(公告)日：1984-01-17
申请号：JP11807582
申请日：1982-07-06
申请人： Pioneer Electronic Corp
发明人： ISHII SATORU , ITOU HIDEO , SHINODA RIYUUICHI
IPC分类号： H03F1/34 , H03F3/20
CPC分类号： H03F1/34
摘要： PURPOSE:To improve considerably a voltage distortion at speaker terminals, by constituting the circuit so as to cancel the resistive component of a connecting cord connecting the power amplification circuit and a speaker, for enabling the speaker to drive completely. CONSTITUTION:The connecting cord 4 connecting a load such as speaker(not shown in figure) and the power amplification circuit 2 is inserted to one side of a bridge including operational amplifiers 8, 11, the resistive component is measured, a part of constants used for the measurement is taken in a current feedback network so as to constitute the circuit that the resistive component Rc of the connecting cord 4 is cancelled with output resistors R3, R4, Rf and Rb of the amplifiers 8, 11. Thus, the resistance value viewing the amplifiers 8, 11 from the speaker is almost zero, the speaker is driven with a full voltage and the voltage distortion at the speaker terminals is improved remarkably.
摘要翻译：目的：通过构成电路以消除连接功率放大电路和扬声器的连接线的电阻分量，从而显着提高扬声器端子的电压失真，使扬声器完全驱动。构成：将连接诸如扬声器（图中未示出）的负载的连接线4和功率放大电路2插入到包括运算放大器8,11的桥的一侧，测量电阻分量，使用一部分常数用于在电流反馈网络中进行测量，以便构成连接线4的电阻分量Rc被放大器8,11的输出电阻器R3，R4，Rf和Rb消除的电路。因此，电阻值从扬声器观看放大器8,11几乎为零，扬声器以全电压驱动，并且扬声器端子处的电压失真显着提高。

3. 发明专利

JPS5480053A OUTPUT AMPLIFIER 失效
公开(公告)号：JPS5480053A
公开(公告)日：1979-06-26
申请号：JP14764377
申请日：1977-12-08
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO , KAWANABE YOSHIHIRO
IPC分类号： H03F1/02 , H03F1/32 , H03F1/52 , H03F3/20 , H03F3/21 , H03F3/30

4. 发明专利

JPS5441056A PUSHHPULL AMPLIFIER 失效
公开(公告)号：JPS5441056A
公开(公告)日：1979-03-31
申请号：JP10754277
申请日：1977-09-07
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO , TASHIRO MASAHIRO
IPC分类号： H03F3/30 , H03F3/20

5. 发明专利

JPS5328255A SERIES CONTROL TYPE CONSTANTTVOLTAGE UNIT 失效
公开(公告)号：JPS5328255A
公开(公告)日：1978-03-16
申请号：JP10225976
申请日：1976-08-27
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO , OBA KATSUHIRO
IPC分类号： G05F1/56

6. 发明专利

JPS58133011A BIAS CONTROLLING CIRCUIT 失效
公开(公告)号：JPS58133011A
公开(公告)日：1983-08-08
申请号：JP1520182
申请日：1982-02-02
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO
IPC分类号： H03F1/30 , H03F3/20 , H03F3/213 , H03F3/30
摘要： PURPOSE:To keep the fluctuation always at a constant level for the DC bias current of an output transistor, by comparing the both-terminal voltage of an impedance element with the reference voltage and then controlling the voltage between control inputs of the output transistor with a signal corresponding to the difference between said both-terminal voltage and the reference voltage. CONSTITUTION:A pair of level comparing differential amplifiers 2 and 3 are provided to generate the control voltage of a bias voltage controlling circuit 1. The amplifier 2 contains a pair of differential transistors TRQ10 and Q12 which use the both-terminal voltage of an emitter resistance R3 of an output TRQ4 and the reference voltage +E1 as the differential input. The collector output of the TRQ10 is used to a base control signal of a TRQ5. While the amplifier 3 contains a pair of differential TRQ11 and Q13. The collector output of the TRQ11 is used to the base control signal of a TRQ9. Then the base control input voltage of the TRQ5 and Q9 respectively is varied to control the voltage among base control inputs of output TRQ2-Q5.

7. 发明专利

JPS5342540A SEEP CIRCUIT 失效
公开(公告)号：JPS5342540A
公开(公告)日：1978-04-18
申请号：JP11651676
申请日：1976-09-30
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO
IPC分类号： H03F1/30 , H03F3/20 , H03F3/30

8. 发明专利

JPS59119906A FEEDBACK AMPLIFIER CIRCUIT SYSTEM 失效
公开(公告)号：JPS59119906A
公开(公告)日：1984-07-11
申请号：JP22809682
申请日：1982-12-27
申请人： PIONEER ELECTRONIC CORP
发明人： ISHII SATORU , ITOU HIDEO
IPC分类号： H03F1/34
摘要： PURPOSE:To improve both the distortion in a wide band range as well as the input/output impedance by having a term (alpha+Stau), (where alpha, S and tau show a constant, jw and a time constant respectively) for each feedback circuit of a multiplex feedback amplifier circuit system. CONSTITUTION:N units of amplifier groups 1-N are cascaded with each other, and amplifiers 2-N have a pole with 1/tau0 respectively. While amplifiers 2- (N-2) have a zero point with 1/tauX each. A feedback circuit having a transmission function tauF(1-Stau0)/tau0 is provided between an input-output joint of each amplifier and the circuit output OUT from the amplifier 1 to amplifiers (N-1) to form a multiplex loop. Then a feedback circuit having a transmission function beta is provided between the output OUT and the circuit input IN. Here a fixed gain tau0/tauF is obtained with the characteristics up to 1/tau0 in case no outermost feedback loop is applied. This gain reduces at 6dB/OCT with 1/tau0-1/tauX and set at 12dB/OCT with >=1/tauX. Thus it is possible to apply stably a feedback using the outermost loop up to 1/tauX.

9. 发明专利

JPS53106176A DC VOLTAGE DETECTOR 失效
公开(公告)号：JPS53106176A
公开(公告)日：1978-09-14
申请号：JP2112777
申请日：1977-02-28
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO , SUEYOSHI SUSUMU
IPC分类号： G01R19/165 , G01R19/32 , H02H3/50 , H03F1/52

10. 发明专利

JPS52139923A SERIES CONTROLLED CONSTANTTVOLTAGE UNIT 失效
公开(公告)号：JPS52139923A
公开(公告)日：1977-11-22
申请号：JP5702576
申请日：1976-05-18
申请人： PIONEER ELECTRONIC CORP
发明人： ITOU HIDEO
IPC分类号： H02M3/155

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