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    • 6. 发明申请
    • Programmable error amplifier for sensing voltage error in the feedback path of digitially programmable voltage sources
    • 可编程误差放大器,用于感测数字可编程电压源的反馈路径中的电压误差
    • US20060145899A1
    • 2006-07-06
    • US11029307
    • 2005-01-05
    • Piotr MarkowskiChanchal GuptaJohn McNeill
    • Piotr MarkowskiChanchal GuptaJohn McNeill
    • H03M7/00
    • H02M3/1588H02M1/082H02M3/157Y02B70/1466
    • A programmable error amplifier (PEA) that may be used as part of a voltage regulation subsystem to control the output of a digitally programmable voltage source is disclosed. According to various embodiments, the PEA comprises an amplification circuit, an analog voltage sampling circuit and a digital reference voltage sampling circuit. The amplification circuit may employ a negative feedback configuration, and include an amplifier and a plurality of feedback capacitors. The analog voltage sampling circuit is responsive to an analog input voltage (such as the output of the programmable voltage source) and is coupled to the amplification circuit. During a first operational phase (the sampling phase), the analog voltage sampling circuit stores a charge dependent upon the analog input voltage, and during a second operational phase (the conversion phase), the analog voltage sampling circuit transfers the charge to the feedback capacitors of the amplification circuit. The digital reference voltage sampling circuit is responsive to a digital programming word and also is coupled to the amplification circuit. During the first (sampling) phase, the digital reference voltage sampling circuit stores a charge dependent upon the digital programming word, and during the second (conversion) phase transfers the charge to the feedback capacitors of the amplification circuit. A differential voltage based on the difference between the analog voltage and a reference voltage determined by the digital programming word appears across the input terminals of the amplifier.
    • 公开了可用作电压调节子系统的一部分以控制数字可编程电压源的输出的可编程误差放大器(PEA)。 根据各种实施例,PEA包括放大电路,模拟电压采样电路和数字参考电压采样电路。 放大电路可以采用负反馈配置,并且包括放大器和多个反馈电容器。 模拟电压采样电路响应于模拟输入电压(例如可编程电压源的输出)并耦合到放大电路。 在第一个操作阶段(采样阶段),模拟电压采样电路存储取决于模拟输入电压的电荷,在第二个操作阶段(转换阶段)期间,模拟电压采样电路将电荷转移到反馈电容器 的放大电路。 数字参考电压采样电路响应于数字编程字,并且还耦合到放大电路。 在第一(采样)阶段期间,数字参考电压采样电路存储取决于数字编程字的电荷,并且在第二(转换)阶段期间,将电荷转移到放大电路的反馈电容器。 基于模拟电压和由数字编程字确定的参考电压之间的差异的差分电压出现在放大器的输入端上。