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公开(公告)号：US3921090A
公开(公告)日：1975-11-18
申请号：US52375974
申请日：1974-11-14
Applicant: RCA CORP
Inventor： WHEATLEY JR CARL FRANKLIN , WITTLINGER HAROLD ALLEN
CPC classification number: H03F3/45071
Abstract: An operational transconductance amplifier comprises first and second transistors connected in a gain-controlled emitter-coupled differential amplifier configuration and provided active collector loads by the input ports of a first and a second current mirror amplifiers, respectively. The balanced signals appearing at the output ports of the first and the second current mirror amplifiers in response to the balanced signal variations in the collector currents of the first and second transistors are converted to single-ended form by a third current mirror amplifier having its input and output ports connected to the output ports of the first and second current mirror amplifiers, respectively. Improved high-frequency operation of the gain controllable operational transconductance amplifier as an analog multiplier is obtained by applying common mode currents to the input ports of the first and second current mirror amplifiers. The responses to these common mode currents counteract and cancel each other in the output signal from the operation transconductance amplifier.
Abstract translation: 运算跨导放大器包括以增益控制的发射极耦合差分放大器配置连接的第一和第二晶体管，并分别由第一和第二电流镜放大器的输入端口提供有源集电极负载。 响应于第一和第二晶体管的集电极电流的平衡信号变化而出现在第一和第二电流镜放大器的输出端口处的平衡信号由具有其输入的第三电流镜放大器转换成单端形式 以及分别连接到第一和第二电流镜放大器的输出端口的输出端口。 通过将共模电流施加到第一和第二电流镜放大器的输入端口来获得增益可控运算跨导放大器作为模拟乘法器的改进的高频操作。 这些共模电流的响应在来自运算跨导放大器的输出信号中相互抵消并相互抵消。
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公开(公告)号：US3671782A
公开(公告)日：1972-06-20
申请号：US3671782D
申请日：1970-12-01
Applicant: RCA CORP
CPC classification number: G11C27/00 , G11C27/026
Abstract: A sample and hold circuit using a first and second operational transconductance amplifier with a voltage storing device connected in circuit between the first and second amplifiers. A sample of the amplitude level of an input signal is stored in the storage device at predetermined times when the first amplifier is rendered operative. The sampled level is provided at the circuit output terminal at other predetermined times when the second amplifier is rendered operative.
Abstract translation: 一种使用第一和第二操作跨导放大器的采样和保持电路，其中电压存储装置连接在第一和第二放大器之间的电路中。 当第一放大器可操作时，输入信号的幅度电平的采样在预定时间存储在存储装置中。 当第二放大器可操作时，在其它预定时间在电路输出端提供采样电平。
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Patent Agency Ranking
公开(公告)号：US3882728A
公开(公告)日：1975-05-13
申请号：US38564573
申请日：1973-08-06
Applicant: RCA CORP
Inventor： WITTLINGER HAROLD ALLEN
Abstract: One portion of a constant current is applied to one semiconductor device and the remainder to a second semiconductor device. When the temperature difference between the devices changes, the division of current also changes. An operational amplifier responsive to this division of current may be employed to drive an indicator of the temperature difference and to reestablish the original temperature difference between the devices.
Abstract translation: 恒定电流的一部分被施加到一个半导体器件，其余部分被施加到第二半导体器件。 当器件之间的温差变化时，电流的分配也发生变化。 可以使用响应于该电流分配的运算放大器来驱动温度差的指示符并重新建立器件之间的原始温度差。
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公开(公告)号：US3916346A
公开(公告)日：1975-10-28
申请号：US52991074
申请日：1974-12-05
Applicant: RCA CORP
Inventor： WITTLINGER HAROLD ALLEN
Abstract: An operational transconductance amplifier receives an input signal to be modulated at one of its inverting or non-inverting input terminals and a modulating signal at its transconductance control terminal. A signal proportioning circuit, also receptive of the modulating signal minimizes feedthrough of the modulating signal to the output terminal by applying a portion thereof to both the inverting and non-inverting input terminals.
Abstract translation: 运算跨导放大器接收在其反相或非反相输入端子之一处要调制的输入信号和在其跨导控制端子处的调制信号。 也可接受调制信号的信号比例电路通过将调制信号的一部分施加到反相和非反相输入端使得调制信号的馈通最小化到输出端。
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公开(公告)号：US3925718A
公开(公告)日：1975-12-09
申请号：US52625974
申请日：1974-11-26
Applicant: RCA CORP
Inventor： WITTLINGER HAROLD ALLEN
Abstract: Improved high-frequency performance is obtained for a bipolar transistorized current mirror, fabricated as an integrated circuit, through the addition of a field-effect transistor(FET). The conduction path of the FET is placed in series with the output current path of the mirror and the gate electrode is coupled to the input terminal of the mirror. The FET maintains increased output current flow to a load as the frequency increases, thereby compensating for the reduction in gain, with frequency, of the bipolar mirror transistors. This same circuit may be operated as a degenerative FET amplifier, with the mirror providing the quiescent bias for the FET and operating as a degenerative source impedance.
Abstract translation: 通过添加场效应晶体管（FET），通过制作为集成电路的双极型晶体管电流镜获得了改进的高频性能。 FET的导通路径与反射镜的输出电流路径串联放置，并且栅电极耦合到反射镜的输入端。 随着频率的增加，FET保持增加的输出电流流向负载，从而补偿双极镜晶体管的增益和频率的降低。 该相同的电路可以作为退化FET放大器来操作，其中反射镜为FET提供静态偏置并作为退化源阻抗工作。
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公开(公告)号：US3891895A
公开(公告)日：1975-06-24
申请号：US46122674
申请日：1974-04-15
Applicant: RCA CORP
Inventor： WITTLINGER HAROLD ALLEN
Abstract: A rectified current wave is produced proportional to the difference in alternating currents passing through a pair of line conductors. This wave is compared in phase with the line voltage to distinguish between an undesired resistive connection from one of the line conductors to ground (a ''''ground fault'''') and capacitive unbalance between the line conductors and ground.
Abstract translation: 与通过一对线路导体的交流电流的差异产生整流电流波。 将该波与线路电压进行相位比较，以区分来自线路导体之一到地的不期望的电阻连接（“接地故障”）以及线路导体和地之间的电容性不平衡。
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7.发明授权Analog multiplier in which one input signal adjusts the transconductance of a differential amplifier 失效一个输入信号的模拟乘法器调整差分放大器的交叉
公开(公告)号：US3621226A
公开(公告)日：1971-11-16
申请号：US3621226D
申请日：1969-11-21
Applicant: RCA CORP
Inventor： WITTLINGER HAROLD ALLEN
CPC classification number: G06G7/163
Abstract: An input signal representing one quantity X is applied to two amplifiers for producing an output signal proportional to the difference of the transconductance of the respective amplifiers and the amplitude of the signal. A second input signal representing a second quantity Y is employed to adjust the transconductance of the two amplifiers in a sense and amount such that the net output signal formed by the sum of the two output signals they produce is proportional to the product of X and Y.
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