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公开(公告)号：US4038607A
公开(公告)日：1977-07-26
申请号：US716536
申请日：1976-08-23
CPC分类号： H03F3/3028 , H03F1/308 , H03F3/3023 , H03F3/345
摘要： The quiescent current of a class A biased complementary field effect transistor amplifier is regulated by a bias network coupled to the gate electrodes of the output transistors which provides an offset voltage therebetween. When the amplifier supply voltage exceeds a minimum value, the bias network increases the offset voltage. Parameters of the network may be selected such that the change in offset voltage is greater than, less than or equal to the change in supply voltage. In the latter case the quiescent current is constant and the quiescent power dissipation is linearly related to the supply voltage.
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公开(公告)号：US3979689A
公开(公告)日：1976-09-07
申请号：US545091
申请日：1975-01-29
CPC分类号： H03F1/34 , H03F3/45085 , H03F3/45094 , H03F2203/45028 , H03F2203/45311 , H03F2203/45318 , H03F2203/45364 , H03F2203/45476 , H03F2203/45652 , H03F2203/45658
摘要： The transistors of a differential amplifier are coupled at their common emitter electrode connection to a low voltage power supply terminal and at their collector electrodes through respective current sinks to a point of reference potential. The collector electrodes are maintained at a voltage level above the reference potential to permit input signal swings at the base electrodes of the transistors a comparable amount below the reference voltage level. Current sources are provided for satisfying that portion of the current demand of these sinks not furnished by the transistors. When the amplifier is connected to operate as a voltage follower, additional transistors may be provided to prevent an undesirable change in the polarity of the output signal, when the input signal swings substantially below the reference voltage level.
摘要翻译： 差分放大器的晶体管在它们的共同发射极电极连接处被耦合到低电压电源端子，并且在其集电极处通过相应的电流吸收器耦合到参考点。 集电极保持在高于参考电位的电压电平，以允许晶体管的基极处的输入信号摆幅低于参考电压电平的可比量。 提供电流源以满足不由晶体管提供的这些汇的当前需求的那部分。 当放大器被连接以作为电压跟随器操作时，当输入信号基本上低于参考电压电平时，可以提供附加的晶体管以防止输出信号的极性的不期望的改变。
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公开(公告)号：US4034307A
公开(公告)日：1977-07-05
申请号：US655163
申请日：1976-02-04
摘要： A current amplifier (CMA) having plurality of input terminals and an output terminal. Each input circuit and the output circuit of the CMA includes the conduction path of a separate one of a plurality of transistors. Means are provided for applying substantially the same potential to the control electrode of each of these transistors, which means includes an input-terminal-to-control-electrode degenerative feedback connection for each of the transistors having its conduction path in an input circuit. By including a unilaterally conductive device in such an input-terminal-to-control-electrode feedback connection, saturation of the transistor associated therewith caused by certain input current conditions is forestalled.
摘要翻译： 具有多个输入端子和输出端子的电流放大器（CMA）。 CMA的每个输入电路和输出电路包括多个晶体管中的单独一个的导通路径。 提供了用于向这些晶体管中的每一个的控制电极施加基本上相同的电位的装置，这意味着包括用于在输入电路中具有其导通路径的每个晶体管的输入端到控制电极退化反馈连接。 通过在这种输入端到控制电极反馈连接中包括单向导电器件，防止了由某些输入电流条件引起的与其相关联的晶体管的饱和。
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公开(公告)号：US4008441A
公开(公告)日：1977-02-15
申请号：US498108
申请日：1974-08-16
CPC分类号： G05F3/267
摘要： Current mirror amplifiers, each using a field-effect transistor as a source follower to provide collector-to-base feedback to a first bipolar transistor to condition its collector-to-emitter path to accept an input current. A second bipolar transistor has its base-emitter circuit parallelled with base-emitter circuit of the first bipolar transistor which conditions the collector-to-emitter path of the second bipolar transistor to conduct an output current proportionally related to that in the collector-to-emitter path of the first bipolar transistor. Since the source follower supplies the base currents of the bipolar transistors without requiring any gate current, the ratio of the input to output currents is constant regardless of the current gain of the bipolar transistors.
摘要翻译： 电流镜放大器，每个都使用场效应晶体管作为源极跟随器，以向第一双极晶体管提供集电极到基极的反馈，以调节其集电极到发射极的路径以接受输入电流。 第二双极晶体管具有与第一双极晶体管的基极 - 发射极电路并联的基极 - 发射极电路，其调节第二双极晶体管的集电极到发射极的通路，以与集电极 - 第一双极晶体管的发射极路径。 由于源极跟随器不需要任何栅极电流就提供双极晶体管的基极电流，所以与双极晶体管的电流增益无关，输入电流与输出电流的比率是恒定的。
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公开(公告)号：US3996498A
公开(公告)日：1976-12-07
申请号：US578900
申请日：1975-05-19
摘要： A sensing transistor has its base and emitter electrodes connected across a sensing resistor connected in series with the collector electrode of an output transistor. Whenever the collector current to the output transistor tends to exceed a predetermined value, the sensing transistor is turned on to reduce the base current being supplied from a current source to the base of the output transistor to thereby reduce this collector current to less than this value. This reduction is accomplished by diverting the excess portion of the source current through the collector-emitter current path of the sensing transistor, into the collector electrode of the output transistor.
摘要翻译： 感测晶体管的基极和发射极连接在与输出晶体管的集电极串联的感测电阻上。 每当输出晶体管的集电极电流趋于超过预定值时，感测晶体管导通，以将从电流源提供的基极电流减小到输出晶体管的基极，从而将该集电极电流减小到小于该值 。 这种减少是通过将源电流的多余部分转移到感测晶体管的集电极 - 发射极电流路径来实现的，进入输出晶体管的集电极。
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公开(公告)号：US3963963A
公开(公告)日：1976-06-15
申请号：US570434
申请日：1975-04-22
CPC分类号： H02H3/331
摘要： A neutral ground fault detector couples oscillations from a local oscillator into the neutral conductor of an electric power transmission system whenever a ground-fault appears thereon. Oscillations appearing on the neutral conductor during ground-fault conditions are synchronously detected by homodyning them with oscillations obtained directly from the local oscillator, thereby to otain a direct-current indication of the ground fault on the neutral conductor.
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公开(公告)号：US4080641A
公开(公告)日：1978-03-21
申请号：US704323
申请日：1976-07-12
IPC分类号： H02H3/347 , G01R19/145 , G01R31/02 , H02H3/33 , H02H3/28
CPC分类号： G01R31/025 , G01R19/145 , H02H3/337
摘要： A ground fault detector which exhibits greater sensitivity to sensing coil current during the initial portions of a-c line voltage half-cycles than during the final portions of those half cycles. This improves its response to resistive ground faults in the presence of unbalanced capacitance to ground conditions of the a-c power lines.
摘要翻译： 一种接地故障检测器，它在a-c线电压半周期的初始部分期间比在半个周期的最后部分期间对感测线圈电流具有更大的灵敏度。 在a-c电源线的接地状态不平衡的情况下，这可以改善其对电阻性接地故障的响应。
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8.发明授权
公开(公告)号：US4034239A
公开(公告)日：1977-07-05
申请号：US702400
申请日：1976-07-06
CPC分类号： G06G7/184 , G11C11/403 , G11C27/026 , H01L27/0229
摘要： Capacitance memories operated with intermittently-energized monolithic integrated circuits tend to lose information during periods between the spaced intervals the integrated-circuits are energized. This tendency, attributable to sneak conduction paths in the un-energized integrated circuit, is forestalled by inserting the channel of a field-effect transistor in series with the memory capacitance, which channel is rendered conductive when only the energizing potential is supplied to the integrated circuit.
摘要翻译： 在间歇通电的单片集成电路中运行的电容存储器往往在集成电路通电的间隔期间丢失信息。 通过将场效应晶体管的沟道与存储器电容串联来防止这种趋势，归因于未通电的集成电路中的潜行传导路径，当仅将通电电位提供给集成 电路。
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公开(公告)号：US3953807A
公开(公告)日：1976-04-27
申请号：US572007
申请日：1975-04-28
摘要： A three-terminal current amplifier having a current gain substantially independent of the forward current gains of its component FET's. First and second FET's have source electrodes connected to the common terminal of the amplifier. A third FET has its source electrode connected to the second FET drain electrode and has its gate and drain electrodes connected to the input terminal and the output terminal of the amplifier, respectively. The gate electrodes of the first and second FET's and the first FET drain electrode are coupled to the input terminal by a potential source providing an offset potential smaller than the source-to-gate potential of an FET, which permits the potentials required between the common terminal and each of the input and output terminals to be reduced as compared to prior art FET amplifiers of this sort.
摘要翻译： 具有与其组件FET的正向电流增益基本无关的电流增益的三端电流放大器。 第一和第二FET的源电极连接到放大器的公共端。 第三FET的源电极连接到第二FET漏电极，并且其栅电极和漏电极分别连接到放大器的输入端和输出端。 第一和第二FET的栅电极和第一FET漏电极通过提供小于FET的源极 - 栅极电位的偏移电位的电位源耦合到输入端，这允许在公共端之间所需的电位 并且与现有技术的这种FET放大器相比，每个输入和输出端子都要减小。
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公开(公告)号：US4060770A
公开(公告)日：1977-11-29
申请号：US744408
申请日：1976-11-23
CPC分类号： H03F3/345 , H03F3/04 , H03F3/16 , H03F3/347 , H03F3/45282 , H03F2203/45344 , H03F2203/45352 , H03F2203/45374 , H03F2203/45674
摘要： A differential amplifier suited for use in operational amplifiers employing both FET's and junction transistors has a superior gain-bandwidth product for given input offset specification. Source-coupled FET's accept input signals at their gate electrodes. Each FET is included in a composite transistor device together with a direct coupled, inverting, current amplifier having an input terminal to which the drain electrode of the FET is coupled and having an output terminal coupled to the source electrode of the FET.
摘要翻译： 适用于采用FET和结晶体管的运算放大器的差分放大器，对于给定的输入失调规范，具有出色的增益带宽积。 源极耦合FET在其栅电极处接受输入信号。 每个FET与具有输入端子的直接耦合反相电流放大器一起被包括在复合晶体管器件中，FET的漏极耦合到该输入端子并具有耦合到FET的源电极的输出端子。
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