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公开(公告)号：EP3335093B1
公开(公告)日：2019-05-08
申请号：EP16751382.9
申请日：2016-07-13
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公开(公告)号：EP3465895A1
公开(公告)日：2019-04-10
申请号：EP17728025.2
申请日：2017-05-25
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3.发明公开
公开(公告)号：EP3335315A1
公开(公告)日：2018-06-20
申请号：EP16741775.7
申请日：2016-07-13
IPC分类号： H03F3/45
摘要： Automatically calibrating operational amplifier (op-amp) systems for mitigating effects of offset voltages are disclosed. In one aspect, an automatically calibrating op-amp system is provided that employs an analog calibration signal corresponding to a calibration mode to compensate an output voltage signal of an op-amp corresponding to an amplify mode. An automatic calibration circuit is included that employs a successive approximation register (SAR) controller configured to successively generate digital values based on the output voltage signal of the op-amp in response to a mode signal indicating the calibration mode. The automatic calibration circuit includes a digital-to-analog converter (DAC) configured to convert each successive digital value into the analog calibration signal in response to the mode signal indicating the calibration mode. The analog calibration signal is provided to an auxiliary differential input of the op-amp to compensate for the composite offset voltage in the amplify mode.
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公开(公告)号：EP3335093A1
公开(公告)日：2018-06-20
申请号：EP16751382.9
申请日：2016-07-13
CPC分类号： H02M3/158 , H02M2001/0029 , H03K6/04 , H03K17/163 , H03K19/0016
摘要： Switched power control circuits for controlling the rate of providing voltages to powered circuits are disclosed. In one aspect, a switched power control circuit is provided that is configured to control activation of a headswitch circuit such that the headswitch circuit gradually provides a supply voltage to a powered circuit rather than providing full supply voltage in a substantially instantaneous manner. To gradually ramp up an output voltage, the headswitch circuit is configured to provide the output voltage to the powered circuit in response to a control signal received on a control input. The control signal is generated by a control circuit in response to an enable signal. To prevent the headswitch circuit from providing the full supply voltage to the powered circuit instantaneously, a current sink circuit is configured to control a ramping rate of the output voltage generated by the headswitch circuit.
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6.发明公开PHASE-DEPENDENT OPERATIONAL AMPLIFIERS EMPLOYING PHASE-BASED FREQUENCY COMPENSATION, AND RELATED SYSTEMS AND METHODS 审中-公开具有断相报酬率及相关系统和方法相依赖的运算放大器
公开(公告)号：EP3161960A1
公开(公告)日：2017-05-03
申请号：EP15730029.4
申请日：2015-06-08
IPC分类号： H03F3/45
CPC分类号： H03F1/0205 , G01R19/0092 , H03F3/45076 , H03F3/45977 , H03F2200/462 , H03F2203/45264 , H03F2203/45588
摘要： Phase-dependent operational amplifiers ("op-amps") employing phase-based frequency compensation, and related systems and methods are disclosed. A phase-dependent op-amp is provided configured to provide output voltage based on inputs switched by clock signal. The op-amp employs a frequency compensation system having multiple frequency compensation circuits. The frequency compensation circuit corresponding to the clock phase is selected by selection circuit and coupled to the voltage output node. The op-amp charges each frequency compensation circuit during the clock phase to store voltage approximately equal to output voltage. When transitioning to a clock phase, output voltage of op-amp does not have to charge frequency compensation circuit. Voltage of frequency compensation circuit stored during clock phase is approximately equal to output voltage of op-amp for clock phase. The op-amp need only provide a small amount of voltage to the frequency compensation circuit to slew it to its designed voltage during instances of its clock phase.
摘要翻译： 相位依赖运算放大器（“运算放大器”）使用基于相位的频率补偿，以及相关的系统和方法是游离缺失盘。 从属相运算放大器，提供一种配置基于由时钟信号来切换输入，以提供输出电压。 运算放大器采用了具有多个频率补偿电路的频率补偿系统。 频率补偿电路对应于时钟相位被选择电路选择并连接到电压输出节点。 运算放大器的电荷每个频率补偿电路在时钟相位来存储电压近似等于输出电压。 当转换到时钟相位，运算放大器的输出电压不必充电频率补偿电路。 在时钟相位期间存储的频率补偿电路的电压大致等于所述运算放大器对时钟相位的输出电压。 运算放大器只需要它的时钟相位的实例期间提供电压到频率补偿电路，它杀死其设计的电压的量小。
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