公开(公告)号：US4994729A

公开(公告)日：1991-02-19

申请号：US499732

申请日：1990-03-23

申请人： Stewart S. Taylor

发明人： Stewart S. Taylor

IPC分类号： G05F1/46 ,  G05F3/24

CPC分类号： G05F1/463 ,  G05F3/245 ,  G05F3/247 ,  Y10S323/907

摘要： A solid-state electrical circuit (10) includes a reference diode (D1) and multiple diodes (D3-D14) connected in electrical series to produce a substantially temperature-invariant output reference voltage. The reference diode is characterized by a forward voltage drop (V.sub.D1) that changes in accordance with a temperature coefficient. The multiple diodes, which have selected junction areas (A1 and A2) and receive one of two different forward-bias currents (I1 and I2), are electrically interconnected to establish a net voltage (.DELTA.V.sub.Di) that equals the forward voltage drop across the reference diode and changes in accordance with a net temperature coefficient of substantially equal magnitude but of opposite sign to the temperature coefficient of the reference diode. The output reference voltage equals the sum of the forward voltage drop across the reference diode and the net voltage established by the multiple diodes. The output reference voltage is substantially unaffected by changes in temperature because voltage changes resulting from the two temperature coefficients of opposite sign effectively offset each other. The invention is particularly suitable for implementation in GaAs IC technology.

摘要翻译： 固态电路（10）包括以电串联连接的参考二极管（D1）和多个二极管（D3-D14），以产生基本上温度不变的输出参考电压。 参考二极管的特征在于根据温度系数而变化的正向压降（VD1）。 具有选择的结区（A1和A2）并接收两个不同正向偏置电流（I1和I2）中的一个的多个二极管电互连，以建立等于跨过的正向压降的净电压（DELTA VDi） 参考二极管，并根据基本相等的净温度系数进行变化，但与参考二极管的温度系数相反。 输出参考电压等于参考二极管的正向压降和由多个二极管建立的净电压之和。 输出参考电压基本上不受温度变化的影响，因为由相反符号的两个温度系数导致的电压变化有效地相互抵消。 本发明特别适用于GaAs IC技术的实现。

公开(公告)号：US4808944A

公开(公告)日：1989-02-28

申请号：US123841

申请日：1987-11-23

申请人： Stewart S. Taylor

发明人： Stewart S. Taylor

IPC分类号： H03F3/45

CPC分类号： H03F3/4565 ,  H03F3/45381 ,  H03F2203/45406 ,  H03F2203/45424 ,  H03F2203/45631 ,  H03F2203/45636 ,  H03F2203/45648 ,  H03F2203/45671 ,  H03F2203/45722

摘要： An output stage for producing a high accuracy differential output signal includes a first differential amplifier providing a pair of single-ended first signals of magnitudes that swing in opposite directions between first and second levels following a change in level of an input signal. A sum of magnitudes of the first signals is controlled by an input control current. The first signals provide input to a second differential amplifier supplying a pair of single-ended second signals swinging in opposite directions between third and fourth levels when the first signals change levels, the second signals forming the differential output signal of the output stage. An indicating signal, provided by the second differential amplifier, supplies a measure of a sum of magnitudes of the second signals. A third differential amplifier produces the control current of magnitude determined by a magnitude difference between the indicating signal and a constant reference signal. Feedback provided by the control signal ensures that the sum of magnitudes of the second signals remains constant so as to ensure that they cross a midpoint level between the third and fourth levels concurrently. The magnitude of the reference signal controls the magnitudes of the third and fourth levels in relation to the midpoint level.

摘要翻译： 用于产生高精度差分输出信号的输出级包括第一差分放大器，其提供在输入信号的电平变化之后在第一和第二电平之间沿相反方向摆动的一对幅度的单端第一信号。 第一信号的幅度之和由输入控制电流控制。 当第一信号改变电平时，第一信号向第二差分放大器提供输入，该第二差分放大器提供在第三和第四电平之间沿相反方向摆动的一对单端第二信号，第二信号形成输出级的差分输出信号。 由第二差分放大器提供的指示信号提供第二信号的幅度之和的量度。 第三差分放大器产生由指示信号和恒定参考信号之间的幅度差确定的幅度的控制电流。 由控制信号提供的反馈确保了第二信号的幅度之和保持恒定，以便确保它们同时跨越第三和第四电平之间的中点电平。 参考信号的幅度控制相对于中点电平的第三和第四电平的幅度。

公开(公告)号：US4808853A

公开(公告)日：1989-02-28

申请号：US125272

申请日：1987-11-25

申请人： Stewart S. Taylor

发明人： Stewart S. Taylor

IPC分类号： H03K19/00 ,  H03K19/094 ,  H03K17/16 ,  H03K19/02

CPC分类号： H03K19/0005 ,  H03K19/09429

摘要： A tristate output circuit includes a pair of transistors having sources connected to a switchable current source and drains separately coupled to a voltage source through separate resistors and switching transistors. When the current source and switching transistors are on, the circuit operates in a back termination mode wherein it amplifies a differential input signal applied across the gates of the transistor pair to produce a differential output signal across their drains for transmission on a transmission line. The load resistors are sized to match the characteristic impedance of a transmission line so as to properly terminate the transmission line. In an open drain mode, the switching transistors are off, uncoupling the drains of the transistor pair from the voltage source so as to increase output impedance. In a tristate mode, the current source and switching transistors are turned off, thereby turning off the transistor pair and rendering the output impedance of the circuit substantially infinite.

摘要翻译： 三态输出电路包括一对晶体管，其具有连接到可切换电流源的源极，并且通过单独的电阻器和开关晶体管分别耦合到电压源的漏极。 当电流源和开关晶体管导通时，电路工作在后端模式，其中放大施加在晶体管对的栅极上的差分输入信号，以在其漏极之间产生差分输出信号，以在传输线上传输。 负载电阻的大小与传输线的特性阻抗相匹配，以适当地终止传输线。 在开漏模式中，开关晶体管断开，使晶体管对的漏极与电压源分离，从而增加输出阻抗。 在三态模式中，电流源和开关晶体管截止，从而关断晶体管对，并使电路的输出阻抗基本上无限大。

公开(公告)号：US4786856A

公开(公告)日：1988-11-22

申请号：US195385

申请日：1988-05-10

申请人： Michael H. Metcalf ,  Stewart S. Taylor

发明人： Michael H. Metcalf ,  Stewart S. Taylor

IPC分类号： G05F3/26

CPC分类号： G05F3/265 ,  Y10S323/907

摘要： A current source provides an output current whose magnitude is substantially independent of changes in temperature. In each of three embodiments (50, 100, 120), one or more bipolar transistors are employed to provide a compensating current which is dependent on the base-to-emitter voltages, V.sub.BE, of such bipolar transistors. The compensating current changes with temperature so as to offset changes in the uncompensated output current so that the total output current is substantially independent of V.sub.BE. The three embodiments employ current mirror circuits (10, 122) that provide a current source of simple circuit design that is operable with the use of a single power supply at a relatively low voltage.

摘要翻译： 电流源提供输出电流，其大小基本上与温度变化无关。 在三个实施例（50,100,120）的每个实施例中，采用一个或多个双极晶体管来提供取决于这种双极晶体管的基极 - 发射极电压VBE的补偿电流。 补偿电流随温度变化，以抵消未补偿输出电流的变化，使得总输出电流基本上不依赖于VBE。 三个实施例采用电流镜电路（10,122），其提供简单电路设计的电流源，其可以在相对低的电压下使用单个电源来操作。

公开(公告)号：US4769619A

公开(公告)日：1988-09-06

申请号：US898661

申请日：1986-08-21

申请人： Stewart S. Taylor

发明人： Stewart S. Taylor

IPC分类号： H03F3/343 ,  G05F3/26 ,  H03F1/08 ,  H03F3/34 ,  H03F3/347 ,  H03F3/04

CPC分类号： G05F3/265 ,  H03F1/083

摘要： A current mirror includes first and second transistors having interconnected bases and having emitters respectively coupled through first and second resistors to a common potential source. A collector voltage of the first transistor is fed back to the transistor bases through a feedback capacitor, and through a unity gain amplifier and series resistor, to form a feedback loop for controlling the voltage at the transistor bases. A current source connected to the collector of the first transistor causes the second transistor to produce an output collector current substantially equal in magnitude to the input current. To prevent circuit instability, the feedback capacitor and the aforementioned series resistor are sized to reduce the frequency at which the open loop gain of the feedback loop is unity so that it does not exceed the short-circuit current gain-bandwidth product of the first transistor.

摘要翻译： 电流镜包括具有互连基座的第一和第二晶体管，并且具有分别通过第一和第二电阻耦合到公共电位源的发射极。 第一晶体管的集电极电压通过反馈电容器反馈到晶体管基极，并通过单位增益放大器和串联电阻器，形成用于控制晶体管基极电压的反馈环路。 连接到第一晶体管的集电极的电流源使得第二晶体管产生与输入电流基本相等的输出集电极电流。 为了防止电路不稳定，反馈电容器和上述串联电阻器的尺寸被设定为减小反馈环路的开环增益为单位的频率，使得其不超过第一晶体管的短路电流增益带宽乘积 。

公开(公告)号：US4574233A

公开(公告)日：1986-03-04

申请号：US595227

申请日：1984-03-30

申请人： Stewart S. Taylor

发明人： Stewart S. Taylor

IPC分类号： G05F3/26

CPC分类号： G05F3/265

摘要： A current source circuit includes a first transistor (11) having an output current which is sensed across a resistance connected between the emitter of the first transistor (11) and the negative side of the supply voltage. A series negative feedback loop comprising transistors (13, 15) is connected between the emitter of first transistor (11) and the base of first transistor (11). The transistors (11, 13 and 15) and the other circuit components are selected so as to result in an incremental output resistance approaching that of a cascode current source, while having a voltage drop across the circuit of substantially less than 1 volt.

摘要翻译： 电流源电路包括具有输出电流的第一晶体管（11），该输出电流在连接在第一晶体管（11）的发射极和电源电压的负侧之间的电阻之间被感测。 包括晶体管（13,15）的串联负反馈回路连接在第一晶体管（11）的发射极和第一晶体管（11）的基极之间。 选择晶体管（11,13和15）以及其它电路元件，以使得增量输出电阻接近共源共栅电流源，同时电路上的电压降明显小于1伏。