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1.发明授权
公开(公告)号：US4802236A
公开(公告)日：1989-01-31
申请号：US947783
申请日：1986-12-30
CPC分类号： H03C3/09
摘要： A modulation limiter that eliminates over-deviation otherwise caused by asymmetrical modulation signals in a frequency modulated (FM) transmitter. The output signal from a conventional modulation clipper is integrated, multiplied by a gain constant, and subtracted from the input, which causes the clipper output to have zero average and a high-pass frequency response with a time constant determined by the feedback gain. The zero average value allows the clipped modulation signal to be coupled to a modulator without over-deviation caused by shifts in the average value of the clipped signal, and the high-pass response can be used to give the modulation signal pre-emphasis.
摘要翻译： 一种调制限制器，消除了由调频（FM）发射机中的不对称调制信号引起的过度偏差。 来自常规调制限幅器的输出信号被积分，乘以增益常数，并从输入中减去，这导致限幅器输出具有零平均值和具有由反馈增益确定的时间常数的高通频率响应。 零平均值允许剪切调制信号被耦合到调制器，而不会由限幅信号的平均值的偏移引起过度偏差，并且可以使用高通响应来给出调制信号预加重。
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公开(公告)号：US4716319A
公开(公告)日：1987-12-29
申请号：US892534
申请日：1986-08-04
CPC分类号： G06G7/1865 , H03F1/303
摘要： An improved switched capacitor circuit configuration is disclosed which exhibits improved low voltage supply operation and improved charge injection cancellation performance. In the preferred embodiment of a switched capacitor integrator, the improvement is realized by the particular configuration of a switched tub switch on the input, single N-channel devices at the summing junction, skewing the analog ground V.sub.AG downward, and delaying the clock signals to turn off the switches at the summing junction before the charge injection of the switched tub switch is realized.
摘要翻译： 公开了一种改进的开关电容器电路配置，其展现了改进的低电压供电操作和改进的电荷注入取消性能。 在开关电容积分器的优选实施例中，通过在输入端上的开关桶开关的特定配置，在求和点处的单个N沟道器件，向下倾斜模拟接地VAG，并将时钟信号延迟 在实现开关式开关的充电注入之前关闭相加接点处的开关。
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公开(公告)号：US07305881B2
公开(公告)日：2007-12-11
申请号：US11146993
申请日：2005-06-07
申请人： Yang Zhao , Albert Leung , Michael E. Rebeschini , Gregory P. Pucci , Alexander Dribinsky , Yongyao Cai
发明人： Yang Zhao , Albert Leung , Michael E. Rebeschini , Gregory P. Pucci , Alexander Dribinsky , Yongyao Cai
CPC分类号： G01P15/008
摘要： A thermal accelerometer device that provides a compensation for sensitivity variations over temperature. The thermal accelerometer includes signal conditioning circuitry operative to receive analog signals representing a differential temperature is indicative of a sensed acceleration. The signal conditioning circuitry includes serially connected A-to-D and D-to-A converters, which implement a temperature dependent function and process the received signals to provide a compensation for sensitivity variations over a range of ambient temperature. To provide a ratiometric compensation for variations in power supply voltage, a buffered voltage proportional to the supply voltage is provided as a reference voltage to the D-to-A converter. The thermal accelerometer includes a self-test circuit for verifying the integrity of a heater, temperature sensors, and circuitry included within the device.
摘要翻译： 一种热敏加速度计装置，可提供对温度敏感度变化的补偿。 热加速度计包括信号调节电路，其操作以接收表示差分温度的模拟信号，其指示感测到的加速度。 信号调理电路包括串行连接的A到D和D到A转换器，其实现温度依赖功能并处理接收到的信号以提供在环境温度范围内的灵敏度变化的补偿。 为了提供电源电压变化的比例补偿，将与电源电压成比例的缓冲电压作为参考电压提供给D转换器。 热加速度计包括用于验证加热器，温度传感器和包括在装置内的电路的完整性的自检电路。
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公开(公告)号：US06795752B1
公开(公告)日：2004-09-21
申请号：US09705996
申请日：2000-11-03
申请人： Yang Zhao , Adrian Paul Brokaw , Michael E. Rebeschini , Albert M. Leung , Gregory P. Pucci , Alexander Dribinsky
发明人： Yang Zhao , Adrian Paul Brokaw , Michael E. Rebeschini , Albert M. Leung , Gregory P. Pucci , Alexander Dribinsky
IPC分类号： G01P1500
CPC分类号： G01P15/008 , G01P15/08 , G01P15/12
摘要： An integrated convective accelerometer device. The device includes a thermal acceleration sensor having a thermopile and a heater element; control circuitry for providing closed-loop control of the thermopile common-mode voltage; an instrumentation amplifier; clock generation circuitry; voltage reference circuitry; a temperature sensor; and, output amplifiers. The device can be operated in an absolute or ratiometric mode. Further, the device is formed in a silicon substrate using standard semiconductor processes and is packaged in a standard integrated circuit package.
摘要翻译： 一体化对流加速度计装置。 该装置包括具有热电堆和加热元件的热加速度传感器; 用于提供热电堆共模电压的闭环控制的控制电路; 仪表放大器; 时钟发生电路; 电压参考电路; 温度传感器; 和输出放大器。 该设备可以以绝对或比例模式运行。 此外，使用标准半导体工艺在硅衬底中形成器件，并封装在标准集成电路封装中。
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公开(公告)号：US4706036A
公开(公告)日：1987-11-10
申请号：US944404
申请日：1986-12-22
CPC分类号： H03F3/3022 , H03F3/3027 , H03F3/45179 , H03F3/45183 , H03F2203/30021 , H03F2203/30057 , H03F2203/30126 , H03F2203/30138 , H03F2203/45182 , H03F2203/45221 , H03F2203/45631 , H03F2203/45676
摘要： A differential amplifier is provided which has a low systematic offset voltage and a small variation in quiescent current with respect to variations in processing and temperature while providing low input referred noise and good output drive capability. Each transistor of a differential input pair of transistors is coupled to a plurality of series-connected transistors which are fabricated with substantially equal control electrode dimensions to form composite load tranistors. An output stage having conventional source and sink transistors is coupled to the differential pair of transistors. The sink transistor is implemented as a composite transistor by a plurality of parallel-connected transistors, each also having substantially the same control electrode dimension. Since all the ratioed transistors have equal control electrode dimensions, variations over processing and temperature are minimized. The composite load transistors have a large effective gate length for low input referred noise, and the composite transistor of the output stage has a small effective gate length to provide good drive capability.
摘要翻译： 提供了一种差分放大器，其具有低系统偏移电压和相对于处理和温度变化的静态电流的小变化，同时提供低输入参考噪声和良好的输出驱动能力。 差分输入对晶体管的每个晶体管耦合到多个串联连接的晶体管，其以基本上相等的控制电极尺寸制造以形成复合负载晶体管。 具有常规源极和漏极晶体管的输出级耦合到晶体管的差分对。 宿晶体管通过多个并联连接的晶体管实现为复合晶体管，每个晶体管也具有基本上相同的控制电极尺寸。 由于所有比例的晶体管具有相同的控制电极尺寸，所以使处理和温度的变化最小化。 复合负载晶体管对于低输入参考噪声具有大的有效栅极长度，并且输出级的复合晶体管具有小的有效栅极长度以提供良好的驱动能力。
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