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公开(公告)号：US20180337669A1
公开(公告)日：2018-11-22
申请号：US15597196
申请日：2017-05-17
IPC分类号： H03K17/081 , H02M3/07 , H02H7/16
摘要： Embodiments include a technique for using a charge pump for a distributed voltage passgate with high voltage protection. The technique includes receiving a reference signal, and preventing the reference signal from passing through a passgate to a circuit, wherein the passgate is an NFET passgate. The technique also includes charging the passgate using a charge pump circuit above the reference signal, and regulating the charge pump circuit using a clock signal. The technique also includes controlling the passgate based at least in part on the charge pump circuit.
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公开(公告)号：US10033270B2
公开(公告)日：2018-07-24
申请号：US15334385
申请日：2016-10-26
摘要： An apparatus for providing a local reference voltage for a voltage regulator includes a reference capacitor configured to provide the local reference voltage, a charge pump configured to push current to, or pull current from, the reference capacitor according to one or more control inputs received by the charge pump, and a boosting circuit configured to add or subtract a discrete quantity of charge to the reference capacitor according to one or more boosting control signals. A boosting control circuit may be configured to disconnect a boosting capacitor from the reference capacitor during a first phase of a control cycle and connect the boosting capacitor to the reference capacitor during a second phase of the control cycle. The boosting capacitor may be pre-charged (to add charge) or discharged (to subtract charge) during the first phase of the control cycle. A corresponding method is also disclosed herein.
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公开(公告)号：US09871527B2
公开(公告)日：2018-01-16
申请号：US15419587
申请日：2017-01-30
CPC分类号： H03K5/02 , H02M3/07 , H03F3/45179 , H03F2203/45116 , H03L7/0896 , H03L7/093 , H03L7/099
摘要： A phase-locked loop (PLL) circuit, sense amplifier circuit, and method of operating a sense amplifier circuit are disclosed. The sense amplifier circuit comprises first and second operational amplifiers, each operational amplifier respectively comprising a non-inverting input terminal, an inverting input terminal, and an output stage comprising a current gating circuit having two current gating input terminals, the output stage coupled with an output terminal, the output terminal providing a feedback signal to the inverting input terminal. The input voltage signal is received across the non-inverting input terminals of the first and second operational amplifiers, and is received across the two current gating input terminals of each of the first and second operational amplifiers, wherein the sense amplifier circuit generates a sense voltage signal across the output terminals of the first and second operational amplifiers.
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公开(公告)号：US09250271B2
公开(公告)日：2016-02-02
申请号：US13975904
申请日：2013-08-26
CPC分类号： G01R19/0023 , G05F1/00 , G06F1/26 , G06F1/30 , H02M3/07
摘要： Embodiments relate to a direct voltage sensor and a charge pump system for a computer system. A charge pump that supplies switching current for a plurality of transistors includes a capacitor generating a pumped voltage. A comparator generates a pump control signal for turning on and off charging of the pump capacitor based on a difference between a comparison voltage and a reference voltage. A direct voltage sensor receives a feedback signal reflecting the pumped voltage and generates the comparison voltage in response to the feedback signal. The sensor includes a sensor resistor, a current source configured to drive a sensor current through the sensor resistor, and a differential op-amp that drives the sensor current to cause the voltage drop across the sensor resistor to remain constant as the pumped voltage experiences the voltage drop. The charge pump may include two similar direct voltage sensor controlling positive and negative pumped voltages.
摘要翻译： 实施例涉及用于计算机系统的直流电压传感器和电荷泵系统。 提供多个晶体管的开关电流的电荷泵包括产生泵浦电压的电容器。 比较器基于比较电压和参考电压之间的差产生用于打开和关闭泵电容器的充电的泵控制信号。 直接电压传感器接收反映泵浦电压的反馈信号，并响应于反馈信号产生比较电压。 该传感器包括一个传感器电阻器，一个电流源，用于驱动传感器电流通过传感器电阻器;以及差分运算放大器，驱动传感器电流，导致传感器电阻上的电压降保持不变，因为泵浦电压经历 电压下降。 电荷泵可以包括两个相似的直接电压传感器来控制正和负的泵浦电压。
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