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1. 发明授权

US4377790A Precision differential relaxation oscillator circuit 失效
标题翻译：精密差分放大振荡电路
公开(公告)号：US4377790A
公开(公告)日：1983-03-22
申请号：US298126
申请日：1981-08-31
申请人： Don W. Zobel , W. David Pace
发明人： Don W. Zobel , W. David Pace
IPC分类号： H03K4/50 , H03K4/501 , H03K4/502
CPC分类号： H03K4/502
摘要： A relaxation oscillator which is suited for fabrication as a monolithic circuit and which uses a parallel resistive capacitive frequency determining network wherein a capacitor is charged and discharged between an upper and lower voltage level. As the capacitor is charged to a potential exceeding a first threshold voltage level supplied to a comparator switch, the operating state of the comparator is caused to switch. A current detecting circuit is included which detects a current that is proportional to the charging current supplied to the capacitor from a charge circuit. As the proportional current decreases in value below a predetermined level due to the capacitor being charged to the upper voltage level the current detecting circuit is disabled which actuates a control circuit for switching the threshold voltage applied to the comparator to a lower level. The actuated control circuit also disables the charge circuit such that the capacitor discharges to the lower voltage level at which time the comparator switches states to disable the control circuit whereby the threshold voltage level is switched to the first level. Thereafter, the charge circuit is enabled to enable the current detecting circuit and to charge the capacitor to the upper voltage level.
摘要翻译：一种弛豫振荡器，其适用于制造为单片电路并且使用并联阻性电容性频率确定网络，其中电容器在上和下电压电平之间被充电和放电。当电容器充电到超过提供给比较器开关的第一阈值电压电平的电位时，使比较器的工作状态转变。包括电流检测电路，其检测与从充电电路提供给电容器的充电电流成比例的电流。由于电容器被充电到较高的电压电平，因为比例电流的值降低到预定的电平以下，所以电流检测电路被禁用，该电流检测电路致动用于将施加到比较器的阈值电压切换到较低电平的控制电路。致动的控制电路还禁用充电电路，使得电容器放电到较低的电压电平，在此时比较器切换状态以禁用控制电路，由此将阈值电压电平切换到第一电平。此后，使充电电路能够使电流检测电路和电容器充电到较高的电压电平。

2. 发明授权

US4431874A Balanced current multiplier circuit for a subscriber loop interface circuit 失效
标题翻译：用于用户环路接口电路的平衡电流倍增电路
公开(公告)号：US4431874A
公开(公告)日：1984-02-14
申请号：US305013
申请日：1981-09-24
申请人： Don W. Zobel , W. Eric Main , W. David Pace , Dennis L. Welty
发明人： Don W. Zobel , W. Eric Main , W. David Pace , Dennis L. Welty
IPC分类号： H04B1/58 , H04B3/03 , H04M19/00
CPC分类号： H04M19/005 , H04B1/586
摘要： A balanced multiplier circuit for a subscriber loop interface circuit (SLIC) which provides both loop current to a two-wire bidirectional subscriber loop and suppression of longitudinal signals generated at the two-wire loop input to the SLIC while maintaining the midpoint load voltage at half the available power supply voltage applied to the SLIC.
摘要翻译：用于用户环路接口电路（SLIC）的平衡乘法器电路，其向两线双向用户环路提供两个回路电流，并且抑制在到SLIC的两线环路输入处产生的纵向信号，同时将中点负载电压保持在一半可用的电源电压施加到SLIC。

3. 发明授权

US4485341A Current limiter circuit 失效
标题翻译：限流电路
公开(公告)号：US4485341A
公开(公告)日：1984-11-27
申请号：US402496
申请日：1982-07-28
申请人： Dennis L. Welty , Don W. Zobel
发明人： Dennis L. Welty , Don W. Zobel
IPC分类号： H03F3/26 , H03G11/00 , H04B1/58 , G05F3/20
CPC分类号： H04B1/58 , H03F3/26 , H03G11/002
摘要： A circuit for limiting the magnitude of current sourced from a first load circuit to a second load circuit to a predetermined value. The circuit includes a current sourcing circuit for sourcing current from the first load circuit to the second and a feedback circuit which is responsive to the magnitude of the current sourced to the second load circuit reaching the predetermined value for supplying any additional current that the second load circuit may require while inhibiting additional current from being sourced from the first load circuit.
摘要翻译：一种用于限制从第一负载电路到第二负载电路的电流的大小达到预定值的电路。电路包括用于从第一负载电路向第二负载电路提供电流的电流源电路和响应于来自第二负载电路的电流的幅度达到预定值的反馈电路，以提供任何附加电流，第二负载电路可能需要同时抑制额外的电流来自第一负载电路。

4. 发明授权

US4117819A Threshold circuit suitable for use in electronic ignition systems 失效
标题翻译：阈值电路适用于电子点火系统
公开(公告)号：US4117819A
公开(公告)日：1978-10-03
申请号：US735472
申请日：1976-10-26
申请人： Robert B. Jarrett , Don W. Zobel
发明人： Robert B. Jarrett , Don W. Zobel
IPC分类号： F02P3/04 , F02P3/045 , F02P3/05 , F02P9/00
CPC分类号： F02P3/051
摘要： A variable dwell ignition system comprising a circuit responsive to changes in engine RPM for causing the dwell time of the ignition system to be varied accordingly. The circuit is adapted to be connected to a sensor coil to receive ignition timing signals developed thereacross which are generated in timed relationship to the engine operation. The circuit provides for changing the direct current (DC) level about which the ignition signals are generated such that a threshold level is varied. As the threshold level is varied the dwell time of the system is varied respectively.
摘要翻译：一种可变的停留点火系统，包括响应于发动机RPM的变化的电路，以使点火系统的停留时间相应地变化。该电路适于连接到传感器线圈，以接收以与发动机操作的定时关系产生的点火定时信号。电路提供改变点火信号产生的直流（DC）电平，使得阈值电平变化。随着阈值水平的变化，系统的停留时间分别变化。

5. 发明授权

US5093585A Current biasing for I.sup.2 L circuits 失效
标题翻译： I2L电路的电流偏置
公开(公告)号：US5093585A
公开(公告)日：1992-03-03
申请号：US674477
申请日：1991-03-25
申请人： Geoffrey W. Perkins , Don W. Zobel , Tony Takeshian
发明人： Geoffrey W. Perkins , Don W. Zobel , Tony Takeshian
IPC分类号： G05F1/46 , H03K19/091
CPC分类号： H03K19/091 , G05F1/462
摘要： A negative feedback loop, including a two collector I.sup.2 L gate having one collector returned to the input of the gate and forcing a reference current into the other of the two collectors of the gate, is used to match the current at the collector of the injector of the gate to the reference current. The feedback loop further includes a current source for sourcing the reference current and a pair of cascoded emitter follower transistors coupled between the current source and the injector input of the gate such that the feedback loop will regulate the current through the injector to be equal to the reference current. The injector input of the gate of the feedback loop can be coupled to the injector inputs of similar I.sup.2 L gates to be biased therefrom such that the injector currents are well controlled.
摘要翻译：负反馈环路包括两个集电极I2L栅极，其具有一个集电极返回到栅极的输入端，并且将参考电流强制进入栅极的两个集电极中的另一个，用于匹配在注入器的集电极处的电流门到参考电流。反馈环路还包括用于提供参考电流的电流源和耦合在电流源和栅极的注入器输入之间的一对级联发射极跟随器晶体管，使得反馈回路将调节通过喷射器的电流等于参考电流。反馈环路的栅极的注入器输入端可以耦合到类似的I2L栅极的注入器输入端，从而被偏置，使得注入器电流被良好地控制。

6. 发明授权

US4227157A Frequency compensated high frequency amplifiers 失效
标题翻译：频率补偿高频放大器
公开(公告)号：US4227157A
公开(公告)日：1980-10-07
申请号：US001088
申请日：1979-01-05
申请人： Robert B. Davies , Don W. Zobel
发明人： Robert B. Davies , Don W. Zobel
IPC分类号： H03F1/08 , H03F3/30 , H03F3/213
CPC分类号： H03F3/3071 , H03F1/083
摘要： The disclosed amplifier includes first and second gain stages and first and second frequency compensating capacitors. The second gain stage has a first high impedance node coupled to the first gain stage, a second high impedance node, a first circuit coupled between the first and second high impedance nodes, a third high impedance node, and a second circuit coupled between the second and third high impedance nodes. The impedances at the first, second and third high impedance nodes are a function of frequency and the impedance at the second high impedance node is lower at any given frequency than the impedances at the first and third high impedance nodes. The first frequency compensating capacitor is coupled between the first and third nodes and the second frequency compensating capacitor is coupled between the third and second nodes.
摘要翻译：所公开的放大器包括第一和第二增益级以及第一和第二频率补偿电容器。第二增益级具有耦合到第一增益级的第一高阻抗节点，第二高阻抗节点，耦合在第一和第二高阻抗节点之间的第一电路，第三高阻抗节点和耦合在第二高阻抗节点之间的第二电路和第三高阻抗节点。第一，第二和第三高阻抗节点处的阻抗是频率的函数，并且第二高阻抗节点处的阻抗在任何给定频率下比在第一和第三高阻抗节点处的阻抗更低。第一频率补偿电容器耦合在第一和第三节点之间，第二频率补偿电容器耦合在第三和第二节点之间。

7. 发明授权

US4352056A Solid-state voltage reference providing a regulated voltage having a high magnitude 失效
标题翻译：固态电压基准提供具有高幅度的调节电压
公开(公告)号：US4352056A
公开(公告)日：1982-09-28
申请号：US220207
申请日：1980-12-24
申请人： David L. Cave , Steven L. Harris , Don W. Zobel
发明人： David L. Cave , Steven L. Harris , Don W. Zobel
IPC分类号： G05F3/26 , G05F3/18
CPC分类号： G05F3/265 , Y10S323/907
摘要： A two transistor voltage reference circuit controls the ratio of the current densities of two transistors by a negative feedback loop. A voltage corresponding to the difference in the base-to-emitter voltages of the two transistors is developed which has a positive temperature coefficient (TC) and which is connected in series with the base-to-emitter voltage of one of the two transistors having a negative TC. The circuit parameters are selected so that the resultant combined voltage has a predetermined, composite TC. A zener diode is included in the negative feedback loop and arranged to have a TC which cancels the predetermined composite TC to develop a reference voltage having a high magnitude that has minimal variation with temperature change.
摘要翻译：两个晶体管电压参考电路通过负反馈回路来控制两个晶体管的电流密度比。开发了与两个晶体管的基极 - 发射极间电压差相对应的电压，其具有正温度系数（TC），并且与两个晶体管之一的基极 - 发射极电压串联连接，负TC。选择电路参数，使得所得到的组合电压具有预定的复合TC。齐纳二极管包括在负反馈环路中，并且被布置成具有TC，其消除预定复合TC以开发具有随温度变化的最小变化的高幅度的参考电压。

8. 发明授权

US4278094A Pacemaker with pulse width adjustment circuitry 失效
标题翻译：起搏器具有脉宽调节电路
公开(公告)号：US4278094A
公开(公告)日：1981-07-14
申请号：US83374
申请日：1979-10-10
申请人： Don W. Zobel
发明人： Don W. Zobel
IPC分类号： A61N1/32 , A61N1/362 , A61N1/37 , H03K7/08 , A61N1/36
CPC分类号： A61N1/37 , A61N1/362 , H03K7/08
摘要： A cardiac pacemaker pulse generator utilizing digital circuitry for controlling the provision of cardiac stimulating pulses. The width of the pulses is increased as the battery voltage decreases to maintain the energy of the stimulation pulse. The pulse width of each pacemaker pulse is determined by comparing a reference signal to an incrementally increasing signal which is related to the battery voltage.
摘要翻译：心脏起搏器脉冲发生器利用数字电路来控制提供心脏刺激脉冲。随着电池电压的降低，脉冲的宽度增加，以保持刺激脉冲的能量。通过将参考信号与与电池电压相关的增量增量信号进行比较来确定每个起搏器脉冲的脉冲宽度。

9. 发明授权

US5184028A Current compensating charge pump circuit 失效
标题翻译：电流补偿电荷泵电路
公开(公告)号：US5184028A
公开(公告)日：1993-02-02
申请号：US898998
申请日：1992-06-15
申请人： Don W. Zobel
发明人： Don W. Zobel
IPC分类号： H03K3/0231 , H03K17/14 , H03K17/60 , H03K17/66 , H03L7/089
CPC分类号： H03K17/667 , H03K17/14 , H03K17/603 , H03K3/0231 , H03L7/0896
摘要： A charge pump circuit (10) has been provided for maintaining the currents sunk by each of the bottom current sources (12, 14) substantially equal to the current sourced from a first upper current source (16). The present invention maintains the voltage across a second upper current source (64) that determines the current for the lower current sources to be modified with respect to corresponding changes in the first upper current source wherein these changes in the first upper current source are due to a varying voltage occurring at the output (18) of the charge pump circuit.
摘要翻译：已经提供了一种电荷泵电路（10），用于保持每个底部电流源（12,14）下降的电流基本上等于来自第一上部电流源（16）的电流。本发明保持跨越第二上部电流源（64）的电压，该第二上部电流源确定相对于第一上部电流源中的相应变化要修改的较低电流源的电流，其中第一上部电流源中的这些变化是由于在电荷泵电路的输出端（18）出现变化的电压。

10. 发明授权

US4780625A Integrated circuit sensor circuit 失效
标题翻译：集成电路传感器电路
公开(公告)号：US4780625A
公开(公告)日：1988-10-25
申请号：US49770
申请日：1987-05-12
申请人： Don W. Zobel
发明人： Don W. Zobel
IPC分类号： H03F1/52 , H03F3/45 , H03K5/153 , H03K5/24
CPC分类号： H03F1/52 , H03F3/45071
摘要： An integrated circuit sensor circuit (10) is disclosed which is operable in differential or single-ended modes at DC input potentials which can be below the integrated circuit substrate bias potential (ground). Substrate injection is prevented and the circuit is operable for input signals which can vary relatively widely with respect to the substrate bias potential. This is accomplished even though only a single polarity power supply (+5 volts) with respect to substrate bias potential is used for the integrated circuit. An input stage of an integrated circuit (16) comprises a pair of identical polarity transistors (23, 24) operated in a differential common base mode with an opposite polarity transistor (25) used to supply appropriate bias potential to the common base connection. This prevents substrate injection while maintaining a wide operative range for the sensor circuit. Additional substrate injection preventing circuitry (31) is provided to maintain the collectors of the differential input transistors above the integrated circuit substrate base potential, and input protection circuitry (32-35) is used to limit the magnitude of applied input signals.
摘要翻译：公开了一种集成电路传感器电路（10），其可以在可以低于集成电路衬底偏置电位（接地）的DC输入电位下以差分或单端模式工作。防止衬底注入，并且该电路可操作用于可相对于衬底偏置电位相对较宽变化的输入信号。即使对于集成电路仅使用相对于衬底偏置电位的单极性电源（+5伏特）也是这样。集成电路（16）的输入级包括以差分公共基极模式工作的一对相同的极性晶体管（23,24），其中相反极性晶体管（25）用于向公共基极连接提供适当的偏置电位。这可以防止基板注入，同时保持传感器电路的宽工作范围。提供附加的基板注入防止电路（31）以将差分输入晶体管的集电极保持在集成电路基板基极电位以上，并且输入保护电路（32-35）用于限制所施加的输入信号的幅度。

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