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1.发明授权Shielded capacitive load cell apparatus responsive to weight applied to a vehicle seat 有权屏蔽电容性称重传感器装置，其响应于施加到车辆座椅的重量公开(公告)号：US07119705B2
公开(公告)日：2006-10-10
申请号：US10978260
申请日：2004-10-30
申请人： Gregory J. Manlove , Robert K Constable , Ashraf K. Kamel , Gregory A. Cobb , Duane D. Fortune , William W. Fultz , Dennis P. Griffin , Thomas L. Voreis
发明人： Gregory J. Manlove , Robert K Constable , Ashraf K. Kamel , Gregory A. Cobb , Duane D. Fortune , William W. Fultz , Dennis P. Griffin , Thomas L. Voreis
IPC分类号： G08B71/00
摘要： The capacitance of a shielded capacitive load cell is determined so as to minimize the effect of stray or parasitic capacitance between the load cell and other objects including the shield. The load cell conductors are coupled across input and output terminals of an operational amplifier that is tied to a reference voltage. A constant current is applied to the load cell, and the resulting rate of change in voltage at the amplifier output is measured as a representation of the load cell capacitance. In a vehicle seat sensor application including an electromagnetic interference shield between the load cell and the seating surface, the amplifier output is coupled to the load cell electrode furthest from the shield, the amplifier maintains the other load cell electrode at a virtual reference voltage, and the shield is tied to the reference voltage.
摘要翻译： 确定屏蔽电容性测力传感器的电容，以便最小化负载传感器和包括屏蔽的其它物体之间的杂散或寄生电容的影响。 负载传感器导体耦合在与参考电压相连的运算放大器的输入和输出端上。 将恒定电流施加到测力传感器，并且测量放大器输出端的电压变化率作为测力传感器电容的表示。 在包括负载传感器和就座表面之间的电磁干扰屏蔽的车辆座椅传感器应用中，放大器输出端耦合到距离屏蔽件最远的负载传感器电极，放大器将另一个测力传感器电极维持在虚拟参考电压，并且 屏蔽被连接到参考电压。
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公开(公告)号：US5341431A
公开(公告)日：1994-08-23
申请号：US954721
申请日：1992-10-01
CPC分类号： H04H20/49 , H04B1/30 , H03D1/2254 , Y10S331/02
摘要： A synchronous AM detector and processor requiring a reduced number of external components and fewer integrated circuit pins comprises an audio processor having a first filter operation controlled by a control voltage and an AM stereo decoder including a lock detector and a phase locked loop having a second filter operation controlled by the control voltage. A single control node is coupled to the audio processor and the phase locked loop, the control node providing the control voltage for the audio processor and the phase locked loop. The voltage at the control node is biased normally high, capable of being pulled low by the audio processing circuit and capable of being pulled low by the lock detector. An RC circuit decays the rise time of the control voltage at the control node after the control voltage has been pulled low. Circuitry is added to control the first filter operation of the audio processing circuitry responsive to the control voltage at the control node. Additional circuitry is added to control the second filter operation of the phase locked loop in response to the control voltage level.
摘要翻译： 需要减少数量的外部组件和较少集成电路引脚的同步AM检测器和处理器包括具有由控制电压控制的第一滤波器操作的音频处理器和包括锁定检测器和具有第二滤波器的锁相环的AM立体声解码器 操作由控制电压控制。 单个控制节点耦合到音频处理器和锁相环，控制节点为音频处理器和锁相环提供控制电压。 控制节点处的电压被正常地偏置，能够被音频处理电路拉低并能够被锁定检测器拉低。 在控制电压拉低后，RC电路将控制节点的控制电压上升时间降低。 添加电路以响应于控制节点处的控制电压来控制音频处理电路的第一滤波器操作。 添加附加电路以响应于控制电压电平来控制锁相环的第二滤波器操作。
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公开(公告)号：US5028882A
公开(公告)日：1991-07-02
申请号：US497289
申请日：1990-03-22
CPC分类号： H03F3/26
摘要： A differential operational amplifier comprises a differential input circuit that provides a differential output signal to a plurality of independent output circuits. The gains of the differential input circuit and one output circuit are set by a fixed bias source. A variable bias source controlled by an external signal determines the gain of each other output circuit so that various attenuation characteristics are obtained in the other output circuits without affecting the operating conditions of the operational amplifier. A feedback element between the output of the one output circuit and the differential input circuit assures gain stability.
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公开(公告)号：US4972446A
公开(公告)日：1990-11-20
申请号：US393498
申请日：1989-08-14
IPC分类号： H03K3/0231 , H03L7/06 , H03L7/099
CPC分类号： H03L7/0993
摘要： An analog/digital voltage controlled oscillator includes a voltage to pulse converter which responds to a control voltage to generate appropriate control pulses to change the mode of operation of a divider to thereby vary the output frequency of the oscillator.
摘要翻译： 模拟/数字压控振荡器包括电压 - 脉冲转换器，其响应于控制电压以产生适当的控制脉冲以改变分频器的工作模式，从而改变振荡器的输出频率。
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公开(公告)号：US4901350A
公开(公告)日：1990-02-13
申请号：US340834
申请日：1989-04-20
CPC分类号： H03G3/301 , H03G3/344 , H03G3/345 , H04B1/10 , H04B1/1669
摘要： A closed-loop attenuator for an FM stereo receiver provides attenuation to the L+R audio signal in a controlled and predictable reaction to an ultrasonic noise (USN) voltage presented to an input amplifier. This is accomplished through a closed-loop circuit configuration including a multiplier which modulates the current output of the input amplifier in accordance with the output of a master differential amplifier and supplies the modulated current to a gain stage connected to the input of the master differential amplifier. The output of the master amplifier is mirrored by a slave differential amplifier which applies the actual audio signal attenuation. The closed-loop configuration confines this linear control action to a very narrow range. Outside of this range, the circuit provides either full attenuation or no attenuation.
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公开(公告)号：US06566849B1
公开(公告)日：2003-05-20
申请号：US10075130
申请日：2002-02-12
IPC分类号： G05F304
CPC分类号： G01F1/696 , G01F15/046 , Y10S323/907
摘要： A non-linear temperature compensation circuit (10) is provided for generating at least dual-slope characteristics responsive to changes in operating temperature of the compensation circuit. The compensation circuit includes a temperature dependent current generator circuit (11) for generating at least one output (I4) substantially proportional to changes in the temperature of the circuit, a current-based dual-slope drift generator (12) for generating a current proportional to absolute temperature, and a summing means (14) for summing both current outputs and generating a compensation drift voltage. The temperature dependent current generator includes a sub-circuit having a first current generator that generates a current (I2) that is relatively independent of temperature, and a second current generator that generates a second current (I3) that decreases with increases in temperature. The two currents are compared and a non-zero output current (I4) is generated if the second current (I3) exceeds the first current (I2), which output current (I4) decreases with increases in temperature.
摘要翻译： 提供了一种非线性温度补偿电路（10），用于响应于补偿电路的工作温度变化产生至少双斜率特性。 所述补偿电路包括温度依赖性电流发生器电路（11），用于产生基本上与所述电路的温度变化成比例的至少一个输出（I4），用于产生电流成比例的电流双斜率漂移发生器（12） 以及用于对两个电流输出求和并产生补偿漂移电压的求和装置（14）。 温度相关电流发生器包括具有产生相对独立于温度的电流（I2）的第一电流发生器的子电路和产生随着温度升高而降低的第二电流（I3）的第二电流发生器。 如果第二电流（I3）超过第一电流（I2），输出电流（I4）随着温度的升高而降低，则比较两个电流并产生非零输出电流（I4）。
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公开(公告)号：US06559557B2
公开(公告)日：2003-05-06
申请号：US09742792
申请日：2000-12-20
申请人： Gregory J. Manlove , Lee C. Boger
发明人： Gregory J. Manlove , Lee C. Boger
IPC分类号： B60R2101
CPC分类号： B60R21/013 , B60R2021/01027 , B60R2021/01177
摘要： An error detection circuit for an airbag deployment control system includes a delay circuit receiving an analog acceleration signal, a difference circuit producing a difference signal based on a time difference between the original and delayed acceleration signals, and a first comparator circuit comparing the difference signal to first and second threshold signals. If the difference signal falls within an error region defined between the first and second threshold values, a decision circuit inhibits an otherwise pending airbag deployment event. If, on the other hand, the difference signal falls outside of the error region, the decision circuit allows airbag deployment with minimal delay. The error detection circuit further includes a second comparator circuit comparing the acceleration signal to near-supply and near-ground threshold values, wherein the decision circuit also inhibits airbag deployment if the acceleration signal magnitude exceeds the near-supply threshold value or falls below the near-ground threshold value.
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8.发明授权
公开(公告)号：US5498986A
公开(公告)日：1996-03-12
申请号：US235741
申请日：1994-04-29
申请人： Gregory J. Manlove
发明人： Gregory J. Manlove
CPC分类号： H03K5/249 , H03K5/2481
摘要： A sensor interface circuit is provided which realizes common mode rejection and achieves a desired transfer response while realizing a simplified amplifier arrangement. The interface circuit is particularly useful for amplifying and conditioning signals generated by an oxygen sensor on an automotive vehicle. The sensor interface circuit has first and second inputs for receiving input voltages from a sensor which are joined together to provide a differential voltage representative of the voltage potential between the first and second inputs. One input may receive a common mode ground employed by the sensor. An amplifier having a first input receives a differential voltage at an inverting input and a positive non-zero reference voltage at a non-inverting input. The amplifier has an output coupled to a grounded switch for providing an output signal referenced to reference ground. The circuit is particularly useful for automotive applications for interfacing with an oxygen sensor where voltage excursions may occur between the common mode sensor ground and reference ground.
摘要翻译： 提供一种实现共模抑制的传感器接口电路，并实现期望的传输响应，同时实现简化的放大器布置。 接口电路对于放大和调节由机动车辆上的氧传感器产生的信号特别有用。 传感器接口电路具有用于接收来自传感器的输入电压的第一和第二输入端，所述传感器连接在一起以提供代表第一和第二输入端之间的电压电位的差分电压。 一个输入可以接收由传感器采用的共模接地。 具有第一输入的放大器在反相输入端接收差分电压，并在非反相输入端接收正非零参考电压。 放大器具有耦合到接地开关的输出，用于提供参考参考地的输出信号。 该电路对于与氧传感器接口的汽车应用特别有用，其中可能在共模传感器接地和参考地之间发生电压偏移。
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公开(公告)号：US5365200A
公开(公告)日：1994-11-15
申请号：US957837
申请日：1992-10-08
CPC分类号： H03F3/345 , H03F3/45076
摘要： An integrated circuit apparatus comprises a first stage amplifier and a second stage amplifier. The first stage amplifier is characterized by a cross-coupled integrated layout providing a rail-to-rail swing and a linear gain, A, substantially defined as A=g.sub.m r.sub.o '. The second stage amplifier is coupled to the output of the first stage amplifier and comprises a high-voltage integrated circuit transistor with an AC feedback circuit, the AC feedback circuit comprising, in series, a capacitor, a N+ resistor and an N-WELL resistor, wherein the output of the second stage amplifier is used to directly drive an inductive load.
摘要翻译： 集成电路装置包括第一级放大器和第二级放大器。 第一级放大器的特征在于交叉耦合集成布局，提供轨至轨摆幅和线性增益A，基本上定义为A = gmro'。 第二级放大器耦合到第一级放大器的输出，并且包括具有AC反馈电路的高压集成电路晶体管，AC反馈电路串联包括电容器，N +电阻器和N-WELL电阻器 ，其中第二级放大器的输出用于直接驱动感性负载。
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公开(公告)号：US5261004A
公开(公告)日：1993-11-09
申请号：US808829
申请日：1991-12-17
CPC分类号： H04H20/88 , H04B1/1027 , H04B2001/1054 , H04B2001/1063
摘要： An AM stereo input signal is processed by an envelope detector, an in-phase detector and a quadrature phase detector to yield outputs which may carry short noise impulses. Each output is low pass filtered to derive an average signal level and each output is ratiometrically compared to the corresponding average to detect a tic or modulation substantially above the average. In response to a tic a hold circuit generates a flag for a period which depends on the quality of the input signal. A dual mode deemphasis and sample/hold circuit normally filters the audio signal in each channel and is effective for the duration of the flag to hold the existing signal in the circuit to blank out the noise impulse.
摘要翻译： AM立体声输入信号由包络检测器，同相检测器和正交相位检测器处理，以产生可携带短噪声脉冲的输出。 每个输出被低通滤波以导出平均信号电平，并且每个输出与对应的平均值进行比较，以检测基本上高于平均值的音调或调制。 响应于保持电路，保持电路产生取决于输入信号的质量的周期的标志。 双模式去加重和采样/保持电路通常对每个通道中的音频信号进行滤波，并且在标志的持续时间内有效地保持电路中的现有信号以消除噪声冲击。
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