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    • 1. 发明授权
    • Track and hold with dual pump circuit
    • 跟踪和保持双泵电路
    • US06731155B2
    • 2004-05-04
    • US10308775
    • 2002-12-03
    • J. Mikko HakkarainenKantilal BacraniaEric C. SungHsin-Shu ChenBang-Sup SongMario Sanchez
    • J. Mikko HakkarainenKantilal BacraniaEric C. SungHsin-Shu ChenBang-Sup SongMario Sanchez
    • H03K1716
    • H03M1/165H03M1/365
    • A dual pump circuit including a transmission gate and a dual charge pump. The transmission gate includes a p-channel transistor and an n-channel transistor, each having a control terminal and a pair of current terminals coupled between a dual pump input and a dual pump output. The dual charge pump includes first and second pump circuits, where each pump circuit is coupled to the dual pump input and to a control terminal of a corresponding one of the transmission gate transistors. Each pump circuit is operative to linearize operation of its corresponding transmission gate transistor by maintaining VGS—VT constant. The dual pump circuit is used in a track and hold circuit including at least one dual pump sampling circuit, at least one sampling capacitor, and a control circuit for controlling input signal sampling timing. Each dual pump sampling circuit includes the transmission gate and a dual charge pump.
    • 双泵电路,包括传输门和双电荷泵。 传输门包括一个p沟道晶体管和一个n沟道晶体管,每个具有一个控制端子和一对电流端子,耦合在一个双泵输入端和一个双泵输出端之间。 双电荷泵包括第一和第二泵电路,其中每个泵电路耦合到双泵输入和相应的一个传输栅晶体管的控制端。 每个泵电路通过维持VGS-VT恒定而使其对应的传输门晶体管的操作线性化。 双泵电路用于包括至少一个双泵采样电路,至少一个采样电容器和用于控制输入信号采样定时的控制电路的跟踪和保持电路。 每个双泵采样电路包括传输门和双电荷泵。
    • 10. 发明授权
    • System and method of DC calibration of amplifiers
    • 放大器的直流校准系统和方法
    • US06714886B2
    • 2004-03-30
    • US10207470
    • 2002-07-29
    • Eric C. SungKantilal BacraniaHsin-Shu ChenJ. Mikko HakkarainenBang-Sup SongBrian L. AllenMario Sanchez
    • Eric C. SungKantilal BacraniaHsin-Shu ChenJ. Mikko HakkarainenBang-Sup SongBrian L. AllenMario Sanchez
    • H03M112
    • H03M1/165H03M1/365
    • A compensation system for calibrating an amplifier having a compensation input including a sigma delta converter, a counter, a memory, adjust logic, a DAC, a pair of compensation capacitors, and a pair of current to voltage (I/V) converters. The converter converts an offset voltage to a bit stream. The counter stores a sum value indicative of the output offset. The memory stores a digital bias value. The adjust logic determines an adjust value based on the sum value and adjusts the stored digital bias value based on the adjust value. The DAC converts the digital bias value to a differential bias current. The compensation capacitors apply a compensation voltage to a compensation input of the amplifier. The I/V converters charge the compensation capacitors using the differential bias current. The adjust logic may use upper and lower thresholds and adjust the digital bias value by one LSB for each compensation cycle.
    • 一种用于校准具有包括Σ-Δ转换器,计数器,存储器,调整逻辑,DAC,一对补偿电容器和一对电流 - 电压(I / V)转换器的补偿输入的放大器的补偿系统。 转换器将偏移电压转换为位流。 计数器存储表示输出偏移量的和值。 存储器存储数字偏置值。 调整逻辑基于和值确定调整值,并根据调整值调整存储的数字偏置值。 DAC将数字偏置值转换为差分偏置电流。 补偿电容器将补偿电压施加到放大器的补偿输入。 I / V转换器使用差分偏置电流对补偿电容器充电。 调整逻辑可以使用上限和下限阈值,并且在每个补偿周期内将数字偏置值调整一个LSB​​。