公开(公告)号：US4689500A

公开(公告)日：1987-08-25

申请号：US864368

申请日：1986-05-19

申请人： Randall C. Gray ,  Robert M. Hess ,  Robert B. Jarrett ,  Edward E. Li

发明人： Randall C. Gray ,  Robert M. Hess ,  Robert B. Jarrett ,  Edward E. Li

IPC分类号： H03K17/16 ,  H03K17/30 ,  H03K17/60 ,  H03K5/153 ,  H03K5/24

CPC分类号： H03K17/30 ,  H03K17/16 ,  H03K17/603

摘要： An improved comparator circuit of the type which includes first and second differential PNP transistors operating in conjunction with a current mirror circuit includes an additional dual collector PNP transistor. That is, while the reference voltage is applied to the base of one of the differential transistors, the input voltage to be compared with the reference voltage applied to the emitter of the dual collector's transistor which has a first collector coupled to the base of the other differential transistor. The second collector is coupled to the base of the additional transistor. In this manner, should the input voltage fall below the substrate voltage, the additional transistor will be reverse biased thus preventing the parasitic diode at the base of the second differential transistor from turning on.

摘要翻译： 这种类型的改进的比较器电路包括与电流镜电路一起工作的第一和第二差分PNP晶体管，其包括附加的双集电极PNP晶体管。 也就是说，当参考电压施加到差分晶体管之一的基极时，要与施加到双集电极晶体管的发射极的参考电压相比较的输入电压，其具有耦合到另一个的基极的第一集电极 差分晶体管。 第二集电极耦合到附加晶体管的基极。 以这种方式，如果输入电压低于衬底电压，则附加晶体管将被反向偏置，从而防止第二差分晶体管的基极处的寄生二极管导通。

公开(公告)号：US4574221A

公开(公告)日：1986-03-04

申请号：US567973

申请日：1984-01-04

申请人： Robert M. Hess ,  Robert B. Jarrett

发明人： Robert M. Hess ,  Robert B. Jarrett

IPC分类号： F02P3/055 ,  H05B37/00

CPC分类号： F02P3/0552

摘要： There is disclosed an ignition control circuit of the type which facilitates the storage of energy in an external inductive load during a dwell period and the release of the stored energy from the inductive load through a spark gap at the end of the dwell period. The circuit includes switch means for conducting current through the inductive load during the dwell period, and an integrated circuit for turning the switch means on during the dwell period and off at the end of the dwell period. The integrated circuit includes an output transistor for controlling the switch means, a current source for driving the output transistor, and control means for enabling the current source during the dwell period and disabling the current source at the end of the dwell period.

摘要翻译： 公开了一种这样的点火控制电路，该电路有助于在驻留期间内将外部电感负载中的能量储存起来，并且在驻留期间结束时释放存储的能量从感性负载通过火花隙。 该电路包括用于在驻留期间内传导电流通过感性负载的开关装置，以及用于在停留期间接通开关装置的集成电路，并且在停留周期结束时断开。 集成电路包括用于控制开关装置的输出晶体管，用于驱动输出晶体管的电流源，以及用于在停留时段期间使电流源能够使能电流源并在停留周期结束时禁用电流源的控制装置。

公开(公告)号：US5157274A

公开(公告)日：1992-10-20

申请号：US516407

申请日：1990-04-30

申请人： Roy E. Hunninghaus ,  Robert M. Hess

发明人： Roy E. Hunninghaus ,  Robert M. Hess

IPC分类号： H03F1/30 ,  H03F3/347

CPC分类号： H03F1/30 ,  H03F3/347 ,  Y10S323/909

摘要： An electrical interface circuit (200), for use with a zirconium dioxide sensor (202), includes an input differential amplifier (208) having its inverting input coupled to the circuit input (204) to receive a sensor voltage relative to sensor ground potential, and having its output coupled to the circuit output (210) to produce an output voltage relative to circuit ground potential. Additionally a feedback differential amplifier (214) has its inverting input coupled to the circuit output (210), its non-inverting input coupled to sensor ground potential, and its output coupled to the non-inverting input of the input differential amplifier (208) so that voltage change at the circuit input due to change of sensor ground potential relative to circuit ground potential is substantially cancelled.

公开(公告)号：US5019722A

公开(公告)日：1991-05-28

申请号：US489983

申请日：1990-03-05

申请人： Robert M. Hess ,  Roy E. Hunninghaus

发明人： Robert M. Hess ,  Roy E. Hunninghaus

IPC分类号： H03K5/08 ,  H03K5/153

CPC分类号： H03K5/153 ,  H03K5/08

摘要： A detection scheme processes the output signal from a sensor so as to provide an ultimate output signal that is more noise resistant and that has a transition representative of a threshold crossing in the sensor signal. A key part of the detection scheme utilizes an integrated version of the sensor's output signal and compares it to two reference levels. These reference levels are selected to be near the opposite extremes of the amplitude excursions of the integrated sensor signal. Each time the reference levels are exceeded, a binary signal is latched to one of two levels (e.g. high, low), and is further processed to provide the ultimate output signal that is free of multiple, unwanted transitions in the presence of noise.

摘要翻译： 检测方案处理来自传感器的输出信号，以便提供更耐噪声并且具有代表传感器信号中阈值交叉的转换的最终输出信号。 检测方案的关键部分使用传感器输出信号的集成版本，并将其与两个参考电平进行比较。 这些参考电平被选择为接近集成传感器信号的振幅偏移的相反极限。 每次超过参考电平时，二进制信号被锁存到两个电平（例如，高电平，低电平）之一，并被进一步处理以提供在存在噪声的情况下不存在多个不需要的转换的最终输出信号。