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1.发明授权Current mode differential to single-ended conversion circuit for a magnetic wheel speed sensor 失效用于磁轮速度传感器的电流模式差分至单端转换电路
公开(公告)号：US6133728A
公开(公告)日：2000-10-17
申请号：US80384
申请日：1998-05-18
摘要： A variable reluctance sensor interface module having a variable attenuation circuit and a rectifier and differential single-ended conversion circuit for operating in a current mode to attenuate a differential input voltage. The variable attenuation circuit receives an input differential voltage from a magnetic sensor and converts the differential voltage to current. First and second current sourcing circuits, each including a plurality of current sourcing branches, receives the current and provides current attenuation by switching in and out transistor-based current sourcing branches. The rectifier and differential to single-ended conversion circuit converts the variably attenuated currents to a voltage output.
摘要翻译： 具有可变衰减电路的可变磁阻传感器接口模块和用于在电流模式下操作以衰减差分输入电压的整流器和差分单端转换电路。 可变衰减电路从磁传感器接收输入差分电压，并将差分电压转换为电流。 每个包括多个电流源分支的第一和第二电流源电路接收电流并通过切换入和基于晶体管的电流源分支来提供电流衰减。 整流器和差分到单端转换电路将可变衰减电流转换为电压输出。
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2.发明授权Variable attenuation circuit for a differential variable reluctance sensor using current mode 失效使用当前模式的差分可变磁阻传感器的可变衰减电路
公开(公告)号：US6040692A
公开(公告)日：2000-03-21
申请号：US80383
申请日：1998-05-18
CPC分类号： G01P3/488
摘要： A variable reluctance sensor interface module having a variable attenuation circuit and a rectifier and differential to single-ended conversion circuit for operating in a current mode to attenuate a differential input voltage. The variable attenuation circuit receives an input differential voltage from a magnetic sensor and converts the differential voltage to current. First and second current sourcing circuits, each including a plurality of current sourcing branches, receive the current and provides variable current attenuation by switching in and out transistor-based current sourcing branches. The rectifier and differential to single-ended conversion circuit converts the variably attenuated currents to a voltage output.
摘要翻译： 一种可变磁阻传感器接口模块，具有可变衰减电路和整流器和差分到单端转换电路，用于在电流模式下工作以衰减差分输入电压。 可变衰减电路从磁传感器接收输入差分电压，并将差分电压转换为电流。 每个包括多个电流源分支的第一和第二电流源电路接收电流并通过切换入和基于晶体管的电流源分支来提供可变电流衰减。 整流器和差分到单端转换电路将可变衰减电流转换为电压输出。
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3.发明授权Analog/digital feedback circuitry for minimizing DC offset variations in an analog signal 失效模拟/数字反馈电路，用于最小化模拟信号的直流偏移变化公开(公告)号：US06426663B1
公开(公告)日：2002-07-30
申请号：US08610007
申请日：1996-03-04
IPC分类号： H03F102
摘要： An analog signal gain circuit includes an input receiving an analog input signal defined by an ac signal component due to a driving force and a dc offset component independent of the driving force and an output providing an analog output signal defined by an amplified representation of the analog input signal and a dc offset component corresponding to a reference signal. A digital/analog feedback circuit includes a comparator having the reference signal as a switching threshold connected to an up/down counter having a number of digital outputs. The outputs of the up/down counter are connected to a D/A converter which converts the digital count to an analog feedback signal. The feedback signal is provided to the input of the analog signal gain circuit to minimize variations in the dc offset signal component of the analog output signal by compensating for the dc offset signal component of the analog input signal. The up/down counter is clocked at a slow rate to thereby provide a long time constant for minimizing the dc offset signal component.
摘要翻译： 模拟信号增益电路包括接收由与驱动力无关的交流信号分量和独立于驱动力的直流偏移分量的模拟输入信号的输入，以及提供由模拟的放大表示定义的模拟输出信号的输出 输入信号和对应于参考信号的直流偏移分量。 数字/模拟反馈电路包括具有参考信号作为切换阈值的比较器，其连接到具有多个数字输出的上/下计数器。 上/下计数器的输出连接到D / A转换器，它将数字计数转换为模拟反馈信号。 反馈信号被提供给模拟信号增益电路的输入，以通过补偿模拟输入信号的直流偏移信号分量来最小化模拟输出信号的直流偏移信号分量的变化。 上/下计数器以慢速率进行计时，从而提供了一个很长的时间常数，用于最小化直流偏移信号分量。
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4.发明授权One-time programmable latch which allows volatile writes prior to permanent programming 失效一次性可编程锁存器，允许永久编程之前的易失性写入
公开(公告)号：US5856941A
公开(公告)日：1999-01-05
申请号：US929457
申请日：1997-09-15
CPC分类号： G11C16/0441
摘要： A cross-coupled latch circuit that is a one-time programmable latch that allows volatile temporary writes to the latch prior to permanent programming of the latch. The latch circuit includes first and second programmable FET devices that include poly-poly capacitators in series with the gate terminal of each device. A pair of PMOS FET devices combine with the programmable devices to make up the latch. The latch circuit includes other FET devices that are switched on and off depending on whether the latch is being permanently programmed, temporarily written to, or reset. A NAND gate is provided such that a logical high output on the NAND gate allows the first programmable device to be temporarily programmed with a logical one and permanently programmed with a logical zero. A NOR gate is provided such that a logical high on the NOR gate allows the second programmable device to be temporarily programmed with a logical zero and permanently programmed with a logical one.
摘要翻译： 交叉耦合锁存电路，其是在锁存器的永久编程之前允许对锁存器的易失性临时写入的一次性可编程锁存器。 锁存电路包括第一和第二可编程FET器件，其包括与每个器件的栅极端子串联的多晶硅电容器。 一对PMOS FET器件与可编程器件组合构成锁存器。 锁存电路包括根据锁存器是被永久编程，临时写入还是复位而导通和关断的其他FET器件。 提供NAND门，使得NAND门上的逻辑高输出允许第一可编程器件以逻辑1临时编程并且用逻辑零永久编程。 NOR门被提供，使得NOR门上的逻辑高电平允许第二可编程器件被临时编程为逻辑0并且用逻辑0永久编程。
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公开(公告)号：US20130271216A1
公开(公告)日：2013-10-17
申请号：US13448161
申请日：2012-04-16
IPC分类号： H03F3/45
CPC分类号： G01R19/0092 , G01R1/203 , H03F1/26 , H03F3/393 , H03F3/45179 , H03F3/45632 , H03F2200/261 , H03F2200/462 , H03F2200/481 , H03F2203/45548
摘要： A single stage current sense amplifier is described that generates a differential output that is proportional to a current through a sense resistor. The voltage across the sense resistor is Vsense. The current sense amplifier includes a differential transconductance amplifier having high impedance input terminals. An on-chip RC filter filters transients in the Vsense signal. A feedback circuit for each leg of the amplifier causes a pair of input transistors to conduct a fixed constant current irrespective of Vsense, which stabilizes the transconductance. A gain control resistor (Re) is coupled across terminals of the pair of input transistors and has Vsense across it. The current through the gain control resistor is therefore Vsensex1/Re. A level shifting circuit coupled to each of the input transistors lowers a common mode voltage at an output of the amplifier. Chopper circuits at the input and output cancel any offset voltages.
摘要翻译： 描述了单级电流检测放大器，其产生与通过检测电阻器的电流成比例的差分输出。 检测电阻两端的电压为Vsense。 电流检测放大器包括具有高阻抗输入端的差分跨导放大器。 片内RC滤波器对Vsense信号中的瞬变进行滤波。 放大器的每个支路的反馈电路使得一对输入晶体管能够导通固定的恒定电流，而与Vsense无关，这稳定跨导。 增益控制电阻（Re）耦合在该对输入晶体管的端子之间，并且在其上具有Vsense。 因此，通过增益控制电阻的电流为Vsensex1 / Re。 耦合到每个输入晶体管的电平移动电路在放大器的输出处降低共模电压。 输入和输出的斩波电路可以消除任何偏移电压。
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公开(公告)号：US06502460B1
公开(公告)日：2003-01-07
申请号：US09481220
申请日：2000-01-11
IPC分类号： G02F2326
CPC分类号： F01M11/12 , F16N2270/10 , G01F23/244
摘要： An oil level sensor for a vehicle includes a receiver tube oriented upright in the oil pan of the vehicle. A level tube is disposed in the receiver tube and below the level tube is a reference tube. A circuit is electrically connected to the tubes for outputting a signal representative of oil level in the oil pan. As the engine oil level decreases within the level tube, the output of the sensor drops. When the engine oil level is below the bottom of the level tube but higher than the top of the reference tube, the output reaches the lowest value. As the engine oil level continuous decreasing (below the top of the reference tube), the output increases for a first circuit configuration (i.e., level with reference tube), and will stay constant for the second configuration level.
摘要翻译： 用于车辆的油位传感器包括在车辆的油盘中直立定向的接收管。 液位管设置在接收管中，液位管下方是参考管。 电路电连接到管，用于输出代表油底壳油位的信号。 当发动机油位在液位管内降低时，传感器的输出下降。 当发动机油位低于液位管的底部但高于参考管的顶部时，输出达到最低值。 当发动机油位连续下降（低于参考管的顶部）时，对于第一电路配置（即，与参考管的电平）的输出增加，并且对于第二配置水平将保持恒定。
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公开(公告)号：US06175299B1
公开(公告)日：2001-01-16
申请号：US08610021
申请日：1996-03-04
IPC分类号： B60Q100
CPC分类号： B60R21/01332 , B60R21/0132 , B60R21/01336
摘要： An analog signal processing system for determining airbag deployment includes a first low pass filter receiving a conditioned analog accelerometer signal and providing an analog acceleration signal therefrom. A first comparator/latch circuit receives the analog acceleration signal and provides a first signal to a logic circuit. The analog acceleration signal is further provided to a first integrator which converts the signal to a first velocity signal and provides the first velocity signal to a second comparator/latch circuit which provides a second logic level signal to the logic circuit. A second low pass filter receives the analog acceleration signal and provides a low frequency analog acceleration signal to a third comparator/latch circuit which provides a third signal to the logic circuit. The low frequency analog acceleration signal is further received by a second integrator circuit which converts the signal to a second velocity signal and provides the second velocity signal to a fourth comparator/latch circuit which provides a fourth signal to the logic circuit. The logic circuit performs a logic operation on the various logic level signals to provide an airbag deployment signal therefrom. Each comparator/latch circuit has a comparator threshold value associated therewith provided by a threshold circuit. The system is enabled for a preset time period after detecting a predefined acceleration level to provide a time-independent analog algorithm for evaluating the analog acceleration signal for possible airbag deployment.
摘要翻译： 一种用于确定安全气囊部署的模拟信号处理系统包括：第一低通滤波器，其接收经调节的模拟加速度计信号并从其提供模拟加速度信号。 第一比较器/锁存电路接收模拟加速度信号并向逻辑电路提供第一信号。 模拟加速度信号进一步提供给第一积分器，该积分器将该信号转换成第一速度信号，并将第一速度信号提供给向逻辑电路提供第二逻辑电平信号的第二比较器/锁存电路。 第二低通滤波器接收模拟加速度信号，并向第三比较器/锁存电路提供低频模拟加速度信号，该第三比较器/锁存电路向逻辑电路提供第三信号。 低频模拟加速度信号由第二积分器电路进一步接收，该第二积分器电路将信号转换为第二速度信号，并将第二速度信号提供给向逻辑电路提供第四信号的第四比较器/锁存电路。 逻辑电路对各种逻辑电平信号进行逻辑运算，从而提供气囊展开信号。 每个比较器/锁存电路具有由阈值电路提供的与其相关联的比较器阈值。 在检测到预定义的加速度水平之后，系统启用预设时间段，以提供用于评估模拟加速度信号以用于可能的气囊部署的时间无关的模拟算法。
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公开(公告)号：US08648623B2
公开(公告)日：2014-02-11
申请号：US13448161
申请日：2012-04-16
IPC分类号： G01R19/00
CPC分类号： G01R19/0092 , G01R1/203 , H03F1/26 , H03F3/393 , H03F3/45179 , H03F3/45632 , H03F2200/261 , H03F2200/462 , H03F2200/481 , H03F2203/45548
摘要： A single stage current sense amplifier is described that generates a differential output that is proportional to a current through a sense resistor. The voltage across the sense resistor is Vsense. The current sense amplifier includes a differential transconductance amplifier having high impedance input terminals. An on-chip RC filter filters transients in the Vsense signal. A feedback circuit for each leg of the amplifier causes a pair of input transistors to conduct a fixed constant current irrespective of Vsense, which stabilizes the transconductance. A gain control resistor (Re) is coupled across terminals of the pair of input transistors and has Vsense across it. The current through the gain control resistor is therefore Vsensex1/Re. A level shifting circuit coupled to each of the input transistors lowers a common mode voltage at an output of the amplifier. Chopper circuits at the input and output cancel any offset voltages.
摘要翻译： 描述了单级电流检测放大器，其产生与通过检测电阻器的电流成比例的差分输出。 检测电阻两端的电压为Vsense。 电流检测放大器包括具有高阻抗输入端的差分跨导放大器。 片内RC滤波器对Vsense信号中的瞬变进行滤波。 放大器的每个支路的反馈电路使得一对输入晶体管能够导通固定的恒定电流，而与Vsense无关，这稳定跨导。 增益控制电阻（Re）耦合在该对输入晶体管的端子之间，并且在其上具有Vsense。 因此，通过增益控制电阻的电流为Vsensex1 / Re。 耦合到每个输入晶体管的电平移动电路在放大器的输出处降低共模电压。 输入和输出的斩波电路可以消除任何偏移电压。
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公开(公告)号：US6078154A
公开(公告)日：2000-06-20
申请号：US249339
申请日：1999-02-12
CPC分类号： H02P6/18 , Y10S388/909
摘要： Circuitry (100, 100') for determining actuator position includes four MOS transistors (T1-T4) connected to each side of a bi-directional motor (10). The current flowing through the motor (10) at any given time is proportional to voltages developed across the internal impedances of the transistors (T1-T4). The resulting motor voltages are amplified and high-pass filtered to remove any DC offsets due to the signal amplification. The conditioned motor voltages are then compared to one or more threshold voltages and passed through a one shot circuit (120) to provide detectable pulses for each motor commutation event. Circuitry (106,107) is provided for counting pulses provided by the one shot circuit (120) and, based on a desired motor position, for providing a number of digital control signals to a digital control circuit (104). Digital control circuit (104) is responsive to the number of digital control signals to control the gate voltages of the four transistors (T1-T4) to thereby control the position of the motor (10).
摘要翻译： 用于确定致动器位置的电路（100,100'）包括连接到双向电动机（10）的每一侧的四个MOS晶体管（T1-T4）。 在任何给定时间流过电动机（10）的电流与在晶体管（T1-T4）的内部阻抗上产生的电压成比例。 所产生的电机电压被放大并高通滤波，以消除由于信号放大引起的任何DC偏移。 然后将经调节的电动机电压与一个或多个阈值电压进行比较，并通过一次电路（120）以为每个电动机换向事件提供可检测的脉冲。 电路（106,107）被提供用于对由单触发电路（120）提供的脉冲进行计数，并且基于期望的电动机位置，用于向数字控制电路（104）提供多个数字控制信号。 数字控制电路（104）响应于数字控制信号的数量来控制四个晶体管（T1-T4）的栅极电压，从而控制电动机（10）的位置。
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10.发明授权Efficiency measuring circuit for DC-DC converter which calculates internal resistance of switching inductor based on duty cycle 有权基于占空比计算开关电感内部电阻的DC-DC转换器的效率测量电路公开(公告)号：US08278895B2
公开(公告)日：2012-10-02
申请号：US12755291
申请日：2010-04-06
IPC分类号： G05F1/00
CPC分类号： H02M3/156 , G01R1/203 , G01R19/0092 , G01R31/40 , H02M2001/0009
摘要： An efficiency measuring circuit may measure the efficiency of a DC-DC converter having a switching inductor with an internal DC resistance and a plurality of electronic switches that control current through the inductor. A duty cycle circuit may measure the duty cycle of current flowing through one of the electronic switches. A current sense circuit may measure the current flowing through one of the electronic switches. An inductor voltage sensor circuit may measure the voltage across the inductor. A computation circuit may compute the internal DC resistance of the switching inductor based in part on the duty cycle measured by the duty cycle circuit and the current measured by the current sense circuit. The computation circuit may also compute the efficiency of the DC-DC converter.
摘要翻译： 效率测量电路可以测量具有内部直流电阻的开关电感器和控制通过电感器的电流的多个电子开关的DC-DC转换器的效率。 占空比电路可以测量流经电子开关之一的电流的占空比。 电流检测电路可以测量流经电子开关之一的电流。 电感电压传感器电路可以测量电感两端的电压。 计算电路可以部分地基于由占空比电路测量的占空比和由电流检测电路测量的电流来计算开关电感器的内部直流电阻。 计算电路还可以计算DC-DC转换器的效率。
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