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公开(公告)号：JPS6148209A
公开(公告)日：1986-03-08
申请号：JP17025784
申请日：1984-08-15
Applicant: Rohm Co Ltd
Inventor： TSUJI YASUHIKO , HATANO HIROYUKI
CPC classification number: H03G1/0023 , H03G3/10
Abstract: PURPOSE:To suppress the fluctuation of an output dynamic range by flowing a current independent of an operating current to a diode provided as a load of a differential amplifier to make an output DC potential of the differential amplifier constant. CONSTITUTION:An automatic gain control circuit consists of two differential amplifiers 20, 22. Then the current flowing to diodes 30, 32 as loads of the amplifier 20 is set by variable current sources 36, 38 independently of the operating current. Thus, when a control voltage Vc is given, the current of the diodes 30, 32 is increased/decreased, but the output DC potential of the amplifier 20 is kept constant. Since the output of the amplifier 20 is fed to the amplifier 22 having a constant amplification gain, its output DC potential is kept constant. Thus, the output DC potential is kept constant and the fluctuation of the output dynamic range is suppressed.
Abstract translation: 目的：通过将独立于工作电流的电流流向作为差分放大器的负载提供的二极管，以使差分放大器的输出DC电位恒定，来抑制输出动态范围的波动。 构成：自动增益控制电路由两个差分放大器20,22组成。然后，作为放大器20的负载流动到二极管30,32的电流由可变电流源36,38独立于工作电流来设定。 因此，当施加控制电压Vc时，二极管30,32的电流增加/减小，但是放大器20的输出DC电位保持恒定。 由于放大器20的输出被馈送到具有恒定放大增益的放大器22，所以其输出DC电位保持恒定。 因此，输出DC电位保持恒定，抑制输出动态范围的波动。
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公开(公告)号：JPS6148208A
公开(公告)日：1986-03-08
申请号：JP16908484
申请日：1984-08-13
Applicant: Rohm Co Ltd
Inventor： TSUJI YASUHIKO , HATANO HIROYUKI
CPC classification number: H03G3/10 , H03G1/0023
Abstract: PURPOSE:To suppress fluctuation of an output dynamic range by providing a diode to a load of a differential amplifier to keep a current flowing to the diode to a constant value thereby making an output DC potential of the differential amplifier constant. CONSTITUTION:An automatic gain control circuit consists of two differential amplifiers 20, 22 and a current compensation circuit 24. A constant current is given to diodes 34, 36 as a load of the amplifier 20 from constant current source 38, 40 respectively. Although the operating current of the amplifier 20 is changed by a control voltage from a control input terminal 44, the change in the operating current is compensated by a current compensation circuit 24. As a result, the output DC potential of the amplifier 20 is kept constant. Since the output of the amplifier 20 is fed to the amplifier 22 having a constant amplification gain, the output DC potential is kept constant. Thus, the output DC potential is made constant and the fluctuation of the output dynamic range is suppressed.
Abstract translation: 目的：为了通过向差分放大器的负载提供二极管来抑制输出动态范围的波动，以使流过二极管的电流保持恒定，从而使差分放大器的输出直流电位恒定。 构成：自动增益控制电路由两个差分放大器20,22和电流补偿电路24组成。恒定电流分别作为放大器20的负载从恒定电流源38,40分别提供给二极管34,36。 虽然通过来自控制输入端子44的控制电压来改变放大器20的工作电流，但由电流补偿电路24补偿工作电流的变化。结果，放大器20的输出直流电位被保持 不变。 由于放大器20的输出被馈送到具有恒定放大增益的放大器22，所以输出DC电位保持恒定。 因此，使输出DC电位恒定，抑制输出动态范围的波动。
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公开(公告)号：JPS59205808A
公开(公告)日：1984-11-21
申请号：JP8018583
申请日：1983-05-10
Applicant: Nippon Technical Co Ltd
Inventor： OOHASHI TAMAKI
CPC classification number: H03G1/0023
Abstract: PURPOSE:To obtain an AGC circuit very resistant to a strong input and having a large attenuation factor by utilizing the excellent characteristic of a push-pull circuit and a differential amplifier circuit to constitute this circuit. CONSTITUTION:Transistors (TRs) 4 and 5, 6 and 7, and 8 and 9 constitute respectively the 1st, end and 3rd push-pull circuits. The TRs 4 and 6, 5 and 7 corresponding in the 1st and 2nd push-pull circuits are connected differentially respectively to constitute the differential amplifier circuits and the TRs 8, 9 of the 3rd push-pull circuit are connected in opposite phase to the TRs 4, 5 corresponding to the 1st push-pull circuit. A secondary side 1S of an antenna tuning coil 1 is connected between bases of the TRs 4 and 5 and a +B power supply is applied to each collector. The 1st tuning circuit 10 of a high-frequency amplifier stage being the next stage is connected to the emitter of the TRs 6, 7 and the 2nd tuning circuit 11 is connected between the collectors of the TRs 6, 7 respectively.
Abstract translation: 目的：通过利用推挽电路和差分放大器电路的优异特性来获得非常耐强输入并具有大衰减因数的AGC电路，以构成该电路。 构成：晶体管（TRs）4和5,6,7以及8和9分别构成第一，第三和第三推挽电路。 在第1和第2推挽电路中对应的TRs4,6和5分别被差分地连接以构成差动放大器电路，并且第3推挽电路的TRs8,9与TR相反地相连 4，5对应于第一推挽电路。 天线调谐线圈1的次级侧1S连接在TR4和5的基座之间，并且+ B电源施加到每个收集器。 作为下一级的高频放大器级的第一调谐电路10连接到TR6,7的发射极，第二调谐电路11分别连接在TR6,7的集电极之间。
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公开(公告)号：JPS59200512A
公开(公告)日：1984-11-13
申请号：JP7482483
申请日：1983-04-27
Applicant: Iwatsu Electric Co Ltd
Inventor： ITOU YASUHIRO
CPC classification number: H03G1/0023 , H03G1/04
Abstract: PURPOSE:To vary the gain of an amplifier circuit linearly by adding a collector current detecting circuit and a comparing and amplifier circuit for feedback control. CONSTITUTION:The collector current detecting circuit 13 is connected between the common connection point of collectors of transistors (TR) Q3 and Q4 and a power source +EB. The output of this detecting circuit 13 is applied to the uninverted input terminal of the comparison and amplifier circuit 14. On the other hand, a variable voltage source 7 for gain control is connected to the inverted input terminal of the amplifier circuit 14, and its output terminal is connected to bases of the TRs Q3 and Q4 respectively. Consequently, the TRs Q3 and Q4 are controlled by a voltage corresponding to the difference between both inputs to the amplifier 14 to perform feedback control so that a voltage corresponding to the sum of collector currents of the TRs Q3 and Q4 is equal to the gain control voltage of the voltage source 7. Thus, the gain of the amplifier is varied linearly.
Abstract translation: 目的：通过添加集电极电流检测电路和用于反馈控制的比较和放大电路来线性地改变放大器电路的增益。 构成：集电极电流检测电路13连接在晶体管（TR）Q3和Q4的集电极的公共连接点与电源+ EB之间。 该检测电路13的输出被施加到比较放大电路14的未反相输入端。另一方面，用于增益控制的可变电压源7连接到放大器电路14的反相输入端，并且其 输出端分别连接到TRs Q3和Q4的基极。 因此，TRs Q3和Q4由对应于放大器14的两个输入之间的差的电压控制，以执行反馈控制，使得对应于TR Q3和Q4的集电极电流之和的电压等于增益控制 电压源7的电压。因此，放大器的增益线性地变化。
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公开(公告)号：JPS59198015A
公开(公告)日：1984-11-09
申请号：JP7252583
申请日：1983-04-25
Applicant: Sony Corp
Inventor： NIIMURA TSUTOMU , SHIONO TAKASHI , KAWAI RIYUUICHIROU
CPC classification number: H03G1/0023
Abstract: PURPOSE:To prevent the gain from being lowered by adding an input signal voltage to the 1st circuit comprising two diodes and the 2nd circuit comprising a transistor (TR) and a diode and inserting a resistor between the 1st, 2nd circuits and a reference potential. CONSTITUTION:An input signal voltage source 1 is connected to a connecting point of the diodes 4, 5 constituting the 1st circuit via a capacitor 2 and to a base of the TR7 constituting the 2nd circuit. A resistor 21 is inserted between the 1st, 2nd circuits and ground. An input signal voltage Vi is converted into a signal current (is) by an input impedance Zi and the resistor 21 and the gain is made variable by changing a value I of a constant current source 8 or a value I2 of a constant current source 13. Since the diodes as the bias power supply are not required, the gain is not decreased by the resistance of the diodes.
Abstract translation: 目的：为了通过向包括两个二极管的第一电路添加输入信号电压以及包括晶体管（TR）和二极管的第二电路以及在第一和第二电路之间插入电阻和参考电位来防止增益降低。 构成：输入信号电压源1通过电容器2连接到构成第1电路的二极管4,5的连接点，构成第2电路的TR7的基极。 电阻21插在第1，第2电路和地之间。 通过输入阻抗Zi和电阻器21将输入信号电压Vi转换为信号电流（is），并且通过改变恒定电流源8的值I或恒定电流源13的值I2使增益变为可变 由于不需要作为偏置电源的二极管，因此二极管的电阻不会降低增益。
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Patent Agency Ranking
公开(公告)号：JPS59191911A
公开(公告)日：1984-10-31
申请号：JP6533883
申请日：1983-04-15
Applicant: Hitachi Ltd , Hitachi Micro Comput Eng Ltd
Inventor： HIKASA KAZUHIKO , KACHI TADAO , SEKINE YASUSHI , OURA TAKAYUKI
CPC classification number: H03G1/0023
Abstract: PURPOSE:To control simply the amplification factor of a differential amplifying circuit with no trimming of a resistance which requires a complicated and exclusive device, by attaining the variable setting of constant current value for a constant current source which limits a working current flowing in common to a pair of active elements. CONSTITUTION:A differential amplifying circuit consists of a pair of transistors TRQ1 and Q2 connected with a load resistance RC respectively and a constant current source 10 which controls a working current flowing in common to the TRQ1 and Q2. Plural constant current circuits consisting of TRQ3, Q4... and resistances R3, R4... connected in series to the emitters of said transistors are connected in series to each other to constitute the source 10. Then an optional constant current circuit selected by operation signals e1, e2... sent from outside and supplied to the bases of the TRQ3, Q4... is actuated. Thus the constant current value is set variably. Thus the amplification factor is controlled variably for the differential amplifying circuit.
Abstract translation: 目的：为了简单地控制差分放大电路的放大系数，不需要修复需要复杂和排他的器件的电阻，通过实现恒定电流源的恒定电流值的可变设置，这限制了共同流动的工作电流 一对活跃元素。 构成：差分放大电路由一对分别与负载电阻RC连接的晶体管TRQ1和Q2组成，恒流源10控制工作电流共同流向TRQ1和Q2。 由串联连接到所述晶体管的发射极的TRQ3，Q4 ...和电阻R3，R4 ...组成的多个恒流电路彼此串联连接以构成源极10.然后，选择一个可选的恒流电路 从外部发送并提供给TRQ3，Q4 ...的基座的操作信号e1，e2 ...被致动。 因此恒定电流值是可变的。 因此，对差分放大电路可变地控制放大系数。
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公开(公告)号：JPS59189710A
公开(公告)日：1984-10-27
申请号：JP6406183
申请日：1983-04-12
Applicant: Nec Corp
Inventor： FUJINOBU YASUHIRO
CPC classification number: H03G1/0023
Abstract: PURPOSE:To prevent the saturation even for a large-amplitude input signal by using current control variable resistance elements as gain determining resistances which are connected in series to differential transistors (TR) of one differential amplifier and determine a degree of amplification. CONSTITUTION:Current control variable resistance elements 21 and 22 whose resistance values are reduced in accordance with the increase of current are used as gain determining emitter resistances which are inserted in series to differential TRs Q3 and Q4 in the second differential amplifier 2 having a lower degree of amplification. If a voltage Vc of an external control signal is reduced from the state of Vc=V1 and only the second differential amplifier 2 is operated mainly, both resistance values are reduced to obtain a high gain because currents flowed to resistance elements 21 and 22 are increased. If the external control voltage Vc is increased from the state of Vc=V1, resistance values of both resistance elements 21 and 22 are increased because the current flowed to the second differential amplifier 2 is reduced.
Abstract translation: 目的：为了通过使用电流控制可变电阻元件作为增益确定电阻串联连接到一个差分放大器的差分晶体管（TR）并确定放大程度来防止大振幅输入信号的饱和。 构成：电阻值根据电流增加而减小的电流控制可变电阻元件21和22用作增益确定发射极电阻，其串联插入具有较低程度的第二差分放大器2中的差分TR Q3和Q4 的扩增。 如果外部控制信号的电压Vc从Vc = V1的状态减小，并且仅主要操作第二差分放大器2，则由于流向电阻元件21和22的电流增加，所以两个电阻值都被减小以获得高增益 。 如果外部控制电压Vc从Vc = V1的状态增加，则由于流向第二差分放大器2的电流减小，所以两个电阻元件21和22的电阻值增加。
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公开(公告)号：JPS59125109A
公开(公告)日：1984-07-19
申请号：JP23416382
申请日：1982-12-30
Applicant: Rohm Co Ltd
Inventor： HIKITA JIYUNICHI
CPC classification number: H03G1/0023 , H03G3/00
Abstract: PURPOSE:To obtain a stable gain variable amplifier with a simple linear circuit by using the 3rd differential amplifier to control the currents flowing to the 1st and 2nd differential amplifiers to which the input signal is supplied and at the same time feeding back the outputs of the 1st and 2nd differential amplifiers. CONSTITUTION:The current flowing to transistors TR44 and 46 is decided for the 3rd differential amplifier 42 by the output of a gain setting circuit 54. The 1st and 2nd differential amplifiers 2 and 4 are connected in parallel in terms of alternating current and amplify the signal supplied from an input terminal 18. This amplified signal is delivered to an output amplifier 68. In this case, the current flowing to both amplifiers 2 and 4 is decided by the amplifier 42 and accordingly the gain is decided. A feedback circuit 80 is connected to an output terminal 78, and the output is fed back to the terminal opposite to the input terminal of the amplifiers 2 and 4 respectively. Thus the operation is stabilized with a gain variable amplifier. Then the remaining sounds can be completely erased in a close-tight mode with an electronic volume.
Abstract translation: 目的：通过使用第三个差分放大器来获得具有简单线性电路的稳定增益可变放大器来控制流向输入信号所提供的第一和第二差分放大器的电流，同时反馈输出信号的输出 第一和第二差分放大器。 构成：通过增益设置电路54的输出，为第三差分放大器42确定流向晶体管TR44和46的电流。第一和第二差分放大器2和4以交流电并联连接，并放大信号 该放大信号被输送到输出放大器68.在这种情况下，流过放大器2和4的电流由放大器42确定，因此确定增益。 反馈电路80连接到输出端78，并且输出分别反馈到与放大器2和4的输入端相对的端子。 因此，使用增益可变放大器来稳定操作。 然后剩余的声音可以用电子音量的紧密模式完全擦除。
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公开(公告)号：JPS5957508A
公开(公告)日：1984-04-03
申请号：JP16799782
申请日：1982-09-27
Applicant: Sony Corp
Inventor： KIKUCHI MASABUMI
CPC classification number: H03G1/0023
Abstract: PURPOSE:To change the current gain, by controlling a current source of a differential amplifier formed with the combination of two current mirror circuits. CONSTITUTION:The differential amplifier 15 is provided with the current source 16 whose current value IA is varied. An output current I3 of the current mirror circuit 11 is applied to a transistor (TR)Qi of the differential amplifier 15 and a part I6 of a current I2 from the current source 6 is applied to the collector. An output current I4 of the current mirror circuit 12 is applied to the other TRQj and a part I5 of a current I1 from the current source 5 is applied to the collector. Thus, in dividing a part of currents I1, I2 to the differential amplifier 15, collector currents I5, I6 being divided currents are controlled by controlling the current source 16. Thus, the current gain is varied.
Abstract translation: 目的：通过控制由两个电流镜电路的组合形成的差分放大器的电流源来改变电流增益。 构成：差分放大器15具有其电流值IA变化的电流源16。 电流镜电路11的输出电流I3被施加到差分放大器15的晶体管（TR）Qi，并且来自电流源6的电流I2的部分I6被施加到集电极。 电流镜电路12的输出电流I4被施加到另一个TRQj，并且来自电流源5的电流I1的部分I5被施加到集电极。 因此，在将一部分电流I1，I2分配给差分放大器15时，通过控制电流源16来控制分流电流的集电极电流I5，I6。因此，电流增益变化。
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公开(公告)号：JPS58219808A
公开(公告)日：1983-12-21
申请号：JP10322182
申请日：1982-06-15
Applicant: Matsushita Electric Ind Co Ltd
Inventor： TAKAHASHI KIMIYO
CPC classification number: H03G1/0023
Abstract: PURPOSE:To improve sound residual and sound delay by constituting the titled device so that the attenuation variabl of the electronic attenuator is maximized at a point that the resistance of an external variable resistor is minimized. CONSTITUTION:The electronic attenuator to control its attenuation variable by using the external variable resistor 4 is constituted by using a current source 3 of a differential amplifier consisting of transistors (TRs) Q3, Q4 as an input source, fixing the base voltage of the TR Q3 and connecting the base voltage of the TR Q4 to the external variable resistor 4 through a resistor R4 and a TR Q2. The attenuator is set up so that the base voltage of the TR Q4 is minimized and the attenuation variable of a signal outputted from an output resistor R8 connected to the TR Q4 is maximized when the value of the variable resistor 4 is minimized. The minimum value of the variable resistor 4 is the remaining resistance of volume and very small one and the dispersion of the minimum value is extremely small, so that the signal delay and signal residual are improved.
Abstract translation: 目的：通过构成标题装置来改善声音残留和声音延迟，使得电子衰减器的衰减变化在外部可变电阻器的电阻最小化的点被最大化。 构成：通过使用外部可变电阻器4来控制其衰减变量的电子衰减器通过使用由晶体管（TRs）Q3，Q4作为输入源组成的差分放大器的电流源3构成，固定TR的基极电压 Q3，并通过电阻R4和TR Q2将TR Q4的基极电压连接到外部可变电阻4。 衰减器被设置成使得TR Q4的基极电压最小化，并且当可变电阻器4的值最小化时，从连接到TR Q4的输出电阻器R8输出的信号的衰减变量最大化。 可变电阻器4的最小值是体积的剩余电阻和非常小的电阻，并且最小值的色散非常小，从而提高了信号延迟和信号残差。
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