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公开(公告)号：US20190171243A1
公开(公告)日：2019-06-06
申请号：US16172907
申请日：2018-10-29
摘要： A wide-tuning range low output impedance flip voltage follower (FVF) low dropout regulator (LDO) for large capacitor switching loads is disclosed. In some implementations, a touch sensing controller driver includes the LDO, which has an operational amplifier and a FVF. The FVF can have a gain device, a source follower device, and an adaptive level shifter coupled between a drain of the source follower device and a gate of the gain device.
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公开(公告)号：US20190146532A1
公开(公告)日：2019-05-16
申请号：US15814225
申请日：2017-11-15
发明人： Fabio Ballarin , Cristian Garbossa , Marco Piselli
IPC分类号： G05F1/575 , H02P6/28 , G05F1/46 , G05F3/24 , H02M7/5387
CPC分类号： G05F1/575 , G05F1/461 , G05F1/462 , G05F1/468 , H02M2001/0025 , H05B33/0812 , H05B33/0815 , H05B33/0848 , H05B33/0872 , H05B33/0884
摘要： In some examples, a device includes an amplifier circuit configured to receive a reference voltage signal at a first input, receive a feedback signal at a second input, and generate an output signal based on the reference voltage signal and the feedback signal. In some examples, the device also includes a feedback circuit including a soft-shaper circuit that is electrically connected to the second input of the amplifier circuit. In some examples, the feedback circuit is configured to sense a voltage step in the reference voltage signal, generate a voltage step across the soft-shaper circuit approximately equal to the voltage step in the reference voltage signal in response to sensing the voltage step in the reference voltage signal, and ramp a voltage level across the soft-shaper circuit to zero after generating the voltage step across the soft-shaper circuit.
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公开(公告)号：US20190041889A1
公开(公告)日：2019-02-07
申请号：US15876946
申请日：2018-01-22
发明人： Seungchul JUNG , Sang Joon KIM
CPC分类号： H02M3/07 , G05F1/575 , G05F1/59 , H02M2001/0025
摘要： A reference voltage generating apparatus, includes a digital data generating circuit configured to convert an input first reference voltage to digital control data and store the digital control data; and a converting circuit configured to generate a second reference voltage corresponding to the first reference voltage using the stored digital control data.
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公开(公告)号：US20190011944A1
公开(公告)日：2019-01-10
申请号：US16131472
申请日：2018-09-14
发明人： Takashi ONO , Reiji MOCHIDA
摘要： A regulator circuit includes: a voltage detection circuit that detects a magnitude of an output voltage of an output node, and outputs a feedback voltage that indicates a result of the detection; an error amplifier circuit that compares the feedback voltage with a reference voltage, and outputs a voltage that indicates a result of the comparison; an output circuit that supplies an output current to the output node according to the voltage output by the error amplifier circuit; a current detection circuit that detects a magnitude of the output current; and a current bias circuit that supplies an output bias current to the output node, and increases or decreases the output bias current based on a result of the detection of the current detection circuit.
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公开(公告)号：US20180367034A1
公开(公告)日：2018-12-20
申请号：US16006379
申请日：2018-06-12
申请人： ABLIC INC. , The Ritsumeikan Trust
IPC分类号： H02M3/155
摘要： A power source device includes a storage capacitor, a voltage detection circuit, input terminals, and output terminals, further includes: a boost circuit which converts a storage power provided to the input terminals to a boosted power under the condition that a stored voltage becomes equal to or greater than the predetermined voltage, and outputs the boosted power from the output terminals; and a MOS transistor which controls a supply of the boosted power to a load. One of the input terminals is connected to a gate terminal of the MOS transistor, and one of the output terminals is connected to a source terminal of the MOS transistor. The MOS transistor turns on to convert the storage power to the boosted power in the boost circuit, while the MOS transistor turns off not to convert the storage power to the boosted power in the boost circuit.
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公开(公告)号：US20180364748A1
公开(公告)日：2018-12-20
申请号：US15626425
申请日：2017-06-19
发明人： Li Wei , Steffen Skaug
CPC分类号： G05F1/575 , H02M3/158 , H02M2001/0025
摘要： In an example, an apparatus includes: a pass device coupled between a supply voltage node and a load circuit and to provide a regulated voltage to the load circuit in response to a control signal received at a control terminal of the pass device; a first amplifier to compare a reference voltage to the regulated voltage and to output a comparison signal at a comparison node in response to the comparison; a second amplifier having an input device having a control terminal coupled to the comparison node to receive the comparison signal and to output the control signal to the pass device based at least in part in response to the comparison signal; and a feedback circuit to provide a feedback signal to the first amplifier based at least in part on a load current of the load circuit.
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公开(公告)号：US20180307258A1
公开(公告)日：2018-10-25
申请号：US16022266
申请日：2018-06-28
发明人： Petr KADANKA
摘要： A low-voltage bandgap reference circuit includes a current source supplying a reference voltage rail. A first BJT has a collector coupled to the voltage rail via a resistor, a base coupled directly to the voltage rail, and an emitter coupled to ground via an emitter resistance. A second BJT has a collector coupled to the voltage rail via a resistor, a base coupled to voltage rail by a first base resistance and to ground via a second base resistance, and a collector coupled to the emitter resistance via an intermediate resistance. A third BJT has a collector driven by a current source, a base coupled to a node between the first and second base resistances, and an emitter coupled to ground. A feedback amplifier regulates the reference voltage rail to equalize collector voltages of the first and second BJTs.
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公开(公告)号：US20180292853A1
公开(公告)日：2018-10-11
申请号：US15946793
申请日：2018-04-06
摘要： A circuit for generating an output voltage, and regulating the output voltage to a target voltage, is described. The circuit comprises a pass device coupled between an input voltage level and an output voltage level, an error amplifier stage configured to generate a first control voltage on the basis of a reference voltage and the output voltage, a buffer stage configured to generate a drive signal for the pass device on the basis of the first control voltage, and a tracking circuit configured to track a voltage across the pass device and to generate a second control voltage on the basis of the voltage across the pass device. The buffer stage comprises a variable resistance element, for limiting a current flowing through the buffer stage on the basis of the second control voltage.
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公开(公告)号：US20180284820A1
公开(公告)日：2018-10-04
申请号：US16000220
申请日：2018-06-05
发明人： Wei Lu Chu , Dong Pan
摘要： An apparatus is described comprising a bandgap reference circuit comprising: an amplifier including first and second inputs and an output; and a bandgap transistor coupled to the output of the amplifier at a control electrode thereof, the bandgap transistor being further coupled commonly to the first and second inputs of the amplifier at a first electrode thereof to form a feedback path. The apparatus further comprises a resistor coupled to the first electrode of the bandgap transistor.
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公开(公告)号：US20180262105A1
公开(公告)日：2018-09-13
申请号：US15907225
申请日：2018-02-27
申请人： MediaTek Inc.
发明人： Nien-Hui Kung , Chia-Hua Chou , Yen-Hsun Hsu
摘要： A low dropout regulator that produces an output includes a comparison circuit, configured to compare a signal representative of the output and a reference signal to produce a comparison result. The low dropout regulator also includes a loop controller, coupled to the comparison circuit, configured to generate an output circuit control signal based at least in part on the comparison result. The low dropout regulator also includes an output circuit, comprising two or more output stages, configured to adjust a number of active output stages of the two or more output stages based on the output circuit control signal.
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