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1. 发明授权

US5675268A Overcurrent detection circuit for a power MOSFET and method therefor 失效
标题翻译：功率MOSFET过电流检测电路及其方法
公开(公告)号：US5675268A
公开(公告)日：1997-10-07
申请号：US538522
申请日：1995-10-03
申请人： Thomas D. Petty , Troy L. Stockstad , Warren J. Schultz
发明人： Thomas D. Petty , Troy L. Stockstad , Warren J. Schultz
IPC分类号： H03K17/082 , H03K5/153 , H03K5/22
CPC分类号： H03K17/0822
摘要： An overcurrent detector circuit (21) for a power MOSFET (22) is described. The overcurrent detector circuit (21) generates a bias voltage corresponding to the drain to source voltage of the power MOSFET (22). The drain to source voltage correlates directly to the current being conducted by the power MOSFET (22). An overcurrent condition occurs when the power MOSFET (22) exceeds a predetermined current. The bias voltage is applied to a transistor (24) for generating a current. A current source (29) couples to the transistor (24). The current provided by the transistor equals the reference current of the current source (29) when the power MOSFET conducts the predetermined current. The overcurrent detector circuit (21) generates a signal indicating a overcurrent condition does not exist when the reference current is greater the current provided by the transistor. Conversely, the overcurrent detector circuit (21) generates a signal indicating the overcurrent condition when the current provided by the transistor exceeds the reference current.
摘要翻译：描述了用于功率MOSFET（22）的过电流检测器电路（21）。过电流检测器电路（21）产生对应于功率MOSFET（22）的漏极 - 源极电压的偏置电压。漏极到源极电压直接与由功率MOSFET（22）传导的电流相关。当功率MOSFET（22）超过预定电流时，发生过电流状况。偏置电压被施加到用于产生电流的晶体管（24）。电流源（29）耦合到晶体管（24）。当功率MOSFET导通预定电流时，由晶体管提供的电流等于电流源（29）的参考电流。过电流检测器电路（21）产生指示当晶体管提供的电流的参考电流大时，过电流状态不存在的信号。相反，当由晶体管提供的电流超过参考电流时，过电流检测器电路（21）产生指示过电流状况的信号。

2. 发明授权

US5563437A Semiconductor device having a large sense voltage 失效
标题翻译：具有大的感测电压的半导体器件
公开(公告)号：US5563437A
公开(公告)日：1996-10-08
申请号：US839413
申请日：1992-02-21
申请人： Robert B. Davies , Warren J. Schultz
发明人： Robert B. Davies , Warren J. Schultz
IPC分类号： H01L27/02 , H01L29/06 , H01L29/78 , H03F3/343 , H01L29/76 , H01L21/265
CPC分类号： H01L29/7815 , H01L27/0248 , H01L29/0696
摘要： A large sense voltage is produced by the semiconductor device of the present invention. The semiconductor device, utilizing current mirror techniques, is comprised of a power MOSFET having a plurality of power cells and a plurality of sense cells formed in a semiconductor epitaxial layer. The large sense voltage is provided by isolating and separating the plurality of power cells from the plurality of sense cells by at least the thickness of the semiconductor epitaxial layer. Isolation can be provided by forming a plurality of inactive cells or an elongated cell between the plurality of power cells and the plurality of sense cells. In addition, high voltage capabilities can be maintained by including a partially active region adjacent the power cells to provide for good termination.
摘要翻译：通过本发明的半导体器件产生大的感测电压。利用电流镜技术的半导体器件由具有多个功率单元的功率MOSFET和形成在半导体外延层中的多个感测单元组成。通过将多个功率单元与多个感测单元隔离并分离至少半导体外延层的厚度来提供大的感测电压。可以通过在多个功率单元和多个感测单元之间形成多个非活性单元或细长单元来提供隔离。此外，通过包括邻近功率单元的部分有效区域以提供良好的终止，可以维持高电压能力。

3. 发明授权

US4698655A Overvoltage and overtemperature protection circuit 失效
标题翻译：过电压和过温保护电路
公开(公告)号：US4698655A
公开(公告)日：1987-10-06
申请号：US825954
申请日：1986-02-04
申请人： Warren J. Schultz
发明人： Warren J. Schultz
IPC分类号： H01L27/02 , H01L29/74 , H01L29/749 , H02H5/04 , H01L29/78
CPC分类号： H01L29/749 , H01L27/0259 , H01L29/74 , H02H5/044
摘要： An overvoltage and overtemperature protection circuit that includes an output thyristor fabricated in monolithic integrated circuit form is provided. The thyristor comprises a P-type substrate serving as an anode and diffused cathode and gate region wherein the current flows vertically, optimizing the high voltage and high current capability. A thermal limit circuit is provided for triggering the thyristor when a designated temperature is exceeded. The output thyristor will shunt the output voltage to ground whenever the predetermined voltage or temperature is exceeded.
摘要翻译：提供了一种过电压和过温保护电路，其包括以单片集成电路形式制造的输出晶闸管。晶闸管包括用作阳极的P型衬底和扩散阴极和栅极区域，其中电流垂直流动，优化了高电压和高电流能力。提供热限制电路，用于在超过指定温度时触发晶闸管。每当超过预定电压或温度时，输出晶闸管将输出电压分流到地。

4. 发明授权

US5351549A Pulsed pressure sensor circuit and method therefor 失效
标题翻译：脉冲压力传感器电路及其方法
公开(公告)号：US5351549A
公开(公告)日：1994-10-04
申请号：US954996
申请日：1992-10-01
申请人： Jeffrey Baum , Warren J. Schultz
发明人： Jeffrey Baum , Warren J. Schultz
IPC分类号： G01L9/02 , G01L9/00 , G01L9/06 , G01L9/04
CPC分类号： G01L9/06
摘要： A pulsed pressure sensor circuit (11) with increased sensitivity for measuring low pressures. A pulse generation circuit (12) is enabled by a microprocessor (28) to output a voltage pulse. The voltage pulse biases a pressure sensor (17) which has a port exposed to a pressure to be sensed. The pressure sensor (17) outputs a differential voltage which is proportional to the pressure at the port. The differential voltage is amplified by an amplifier (23) which has an output coupled to the microprocessor (28). A voltage divider circuit (26) is coupled to the pulse generation circuit (12) and has an output coupled to the microprocessor (28). The microprocessor (28) samples the voltages at the output of the amplifier (23) and the output of the voltage divider circuit (26). Microprocessor (28) then calculates the pressure using the sampled voltages and data stored in memory.
摘要翻译：脉冲压力传感器电路（11）具有增加的测量低压的灵敏度。脉冲发生电路（12）由微处理器（28）启动以输出电压脉冲。电压脉冲偏置压力传感器（17），其具有暴露于要感测的压力的端口。压力传感器（17）输出与端口压力成比例的差分电压。差分电压由具有耦合到微处理器（28）的输出的放大器（23）放大。分压器电路（26）耦合到脉冲发生电路（12）并且具有耦合到微处理器（28）的输出。微处理器（28）对放大器（23）的输出端和分压器电路（26）的输出端的电压进行采样。微处理器（28）然后使用存储在存储器中的采样电压和数据来计算压力。

5. 发明授权

US5119000A Low noise motor drive circuit 失效
标题翻译：低噪音电机驱动电路
公开(公告)号：US5119000A
公开(公告)日：1992-06-02
申请号：US660185
申请日：1991-02-25
申请人： Warren J. Schultz
发明人： Warren J. Schultz
IPC分类号： H02P7/00
CPC分类号： H02P7/04
摘要： A normally non-conducting motor drive transistor is connected in parallel with a freewheeling diode. The transistor is briefly enabled while reverse recovery transition current is flowing in the freewheeling diode and thereby reduces noise created by the diode when it switches from conducting reverse recovery current to blocking reverse voltage.
摘要翻译：正常不导电的电动机驱动晶体管与续流二极管并联连接。晶体管短暂使能，而反向恢复转换电流在续流二极管中流动，从而降低二极管从导通反向恢复电流切换到阻断反向电压时产生的噪声。

6. 发明授权

US5299460A Pressure sensor 失效
标题翻译：压力传感器
公开(公告)号：US5299460A
公开(公告)日：1994-04-05
申请号：US840472
申请日：1992-02-24
申请人： Warren J. Schultz , Denise M. Williams
发明人： Warren J. Schultz , Denise M. Williams
IPC分类号： G01L1/00 , G01D21/00 , G01L9/04 , G01L9/06 , H03K7/08 , G01L9/00
CPC分类号： G01L9/06 , G01L9/04
摘要： A circuit for a pulse width modulating a sensor (12) has been provided. The circuit includes a first switch (22) for alternately coupling the sensor between first and second supply voltage terminals. The circuit also includes second (24) and third (28) switches and first and second capacitors for sampling the differential voltage appearing at outputs of the sensor when the first switch is in a closed state.
摘要翻译：已经提供了用于脉冲宽度调制传感器（12）的电路。电路包括用于在第一和第二电源电压端子之间交替耦合传感器的第一开关（22）。电路还包括第二开关（24）和第三开关（28）以及第一和第二电容器，用于对第一开关处于闭合状态时出现在传感器输出端的差分电压进行采样。

7. 发明授权

US4897580A Amplifier drive circuit for inductive loads 失效
标题翻译：用于感性负载的放大器驱动电路
公开(公告)号：US4897580A
公开(公告)日：1990-01-30
申请号：US369413
申请日：1989-06-20
申请人： Warren J. Schultz
发明人： Warren J. Schultz
IPC分类号： H04N3/16 , H03K4/64 , H03K17/60 , H03K17/61 , H04N3/18
CPC分类号： H03K4/64 , H03K17/601
摘要： A transformer coupled amplifier drive circuit (60) and method especially suited for providing a saw-tooth current waveform to an inductive load (32) for horizontal deflection applications in CRT monitors and the like are described. The transformer primary (48) is coupled between the power source connection (11) and the input of the amplifier (26) while the transformer secondary (50) has an opposite polarity terminal coupled to the input of the amplifier (26) through an inductor (52) and the other terminal of the secondary (50) coupled to the common terminal (15) of the amplifier (26) through a diode (56).When the input switch (44) is closed, the input of the amplifier (26) is energized by a current (65) through the series connected primary (48) and energy is stored in the transformer magnetizing field and in the amplifier (26). Conduction in the transformer secondary (50) is blocked by the diode (56).When the input switch (44) is opened, the input charging current (65) stops and the collapsing primary magnetizing field produces an oppositely directed current (67) which flows through the secondary winding (50), the diode (56), the series connected inductor (52) and the input to the amplifier (26). The demagnetization energy stored in the transformer (48) cancels the energy stored in the amplifier (26), thereby reducing total dissipation, and the inductor (52) controls the fall time independent of the rise time.

8. 发明授权

US4562454A Electronic fuse for semiconductor devices 失效
标题翻译：电子熔断器用于半导体器件
公开(公告)号：US4562454A
公开(公告)日：1985-12-31
申请号：US566766
申请日：1983-12-29
申请人： Warren J. Schultz , Herbert A. Saladin
发明人： Warren J. Schultz , Herbert A. Saladin
IPC分类号： H01L27/02 , H02H9/00
CPC分类号： H01L27/0248
摘要： A semiconductor fuse is disclosed that provides protection against both overcurrent and the abrupt application of a voltage to semiconductor devices. A first means is coupled to an input terminal for providing a signal when a current is applied to the input terminal. A second means is coupled between the input terminal and an output terminal for allowing current to pass therebetween and is coupled to the detecting means and responsive to the signal. A third means is coupled between the output terminal and a ground terminal for shorting a current therebetween. A fourth means is coupled to the input terminal, the second means, and the third means for activating the third means and preventing the second means from responding to the signal when the input current exceeds a predetermined value.
摘要翻译：公开了一种半导体保险丝，其提供防止过电流和突然施加电压到半导体器件的保护。第一装置耦合到输入端，用于当电流施加到输入端时提供信号。第二装置耦合在输入端子和输出端子之间，用于允许电流在其间通过，并且耦合到检测装置并响应信号。第三装置连接在输出端子和接地端子之间，用于短路电流。第四装置耦合到输入端子，第二装置和用于激活第三装置的第三装置，并且当输入电流超过预定值时防止第二装置响应信号。

9. 发明授权

US5327016A Load control circuit including automatic AC/DC discernment 失效
标题翻译：负载控制电路包括自动AC / DC辨识
公开(公告)号：US5327016A
公开(公告)日：1994-07-05
申请号：US864102
申请日：1992-04-06
申请人： Stephen Su , Warren J. Schultz , Lloyd Hayes
发明人： Stephen Su , Warren J. Schultz , Lloyd Hayes
IPC分类号： G01R19/165 , G01R31/40 , H03K17/687 , H03K5/22
CPC分类号： H03K17/6871 , G01R19/16538 , G01R31/40 , Y10T307/845
摘要： A control circuit for switching AC or DC loads and for automatically discerning the presence of an AC or a DC power supply via a switch has been provided. The control circuit is coupled to alternately render a switch operative and non-operative wherein the switch is coupled across a load which is powered up by either an AC or a DC power supply. The control circuit includes an AC/DC discernment circuit for ascertaining whether the load is powered up by an AC or a DC power supply. The control circuit also includes circuitry for comparing signals sensed by the switch with predetermined thresholds (which are a function of whether an AC or DC determination has been made) for providing logic signals to control the operation of the switch.
摘要翻译：已经提供了用于切换AC或DC负载并且用于通过开关自动识别AC或DC电源的存在的控制电路。控制电路被耦合以交替地使开关操作和非操作，其中开关耦合在由AC或DC电源供电的负载上。控制电路包括AC / DC识别电路，用于确定负载是由AC还是DC电源供电。控制电路还包括用于将由开关感测的信号与预定阈值（其是否已经进行AC或DC确定的函数）进行比较的电路，用于提供逻辑信号以控制开关的操作。

10. 发明授权

US5155450A Interface circuit 失效
标题翻译：接口电路
公开(公告)号：US5155450A
公开(公告)日：1992-10-13
申请号：US812385
申请日：1991-12-23
申请人： Warren J. Schultz
发明人： Warren J. Schultz
IPC分类号： H03F3/45
CPC分类号： H03F3/45982 , H03F3/45475 , H03F3/4595
摘要： A circuit for interfacing with the outputs of a differential pressure sensor provides a single-ended output voltage translated in voltage level with respect to the differential voltage applied thereto from the sensor while cancelling the common mode offset voltage of the sensor so that the output voltage is independent of the common mode offset voltage. The circuit includes four operational amplifiers arranged as a differential-to-single ended converter with gain.
摘要翻译：用于与差压传感器的输出接口的电路提供了相对于从传感器施加到其上的差分电压的电压电平转换的单端输出电压，同时消除了传感器的共模偏移电压，使得输出电压为独立于共模偏移电压。该电路包括布置成具有增益的差分到单端转换器的四个运算放大器。

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