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公开(公告)号：US20220317712A1
公开(公告)日：2022-10-06
申请号：US17616228
申请日：2020-03-16
摘要： To provide a digitally controlled LDO regulator that can control an output voltage even during an auto-zero processing period. A digitally controlled low dropout regulator is provided that includes a plurality of AD converters and an impedance variable circuit, each of the plurality of AD converters including a comparator, in which a first signal from each of the plurality of AD converters is input to the impedance variable circuit; a second signal output from the impedance variable circuit is input to one of two terminals of each of the plurality of AD converters; when one of the plurality of AD converters is in operation, another of the plurality of AD converters performs auto-zero processing to set a voltage value used as a reference; and the comparator compares a voltage value of the second signal input to the one of the two terminals with the set voltage value.
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公开(公告)号：US20230261623A1
公开(公告)日：2023-08-17
申请号：US18001846
申请日：2021-04-27
发明人： MASAHIRO ICHIHASHI , MASAYUKI KATAKURA , KAZUMASA NISHIMURA , TETSUYA TASHIRO , NOBUHIKO SHIGYO
CPC分类号： H03F3/45475 , H03F3/005 , H03F2203/45551
摘要： To improve stability of a reference current in a current source circuit that generates the reference current by using capacitors. The current source circuit includes a pair of capacitors, a switching circuit, an operational amplifier, and an output transistor. The switching circuit charges one of the pair of capacitors with a predetermined charging current, and transfers electric charge from the one of the pair of capacitors to the other of the pair of capacitors. The operational amplifier amplifies a difference between the terminal voltage of the other of the pair of capacitors and a predetermined reference voltage and outputs the difference that has been amplified as an output voltage. The output transistor outputs a current corresponding to the output voltage as a reference current.
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公开(公告)号：US20210281169A1
公开(公告)日：2021-09-09
申请号：US16609811
申请日：2018-04-24
发明人： MASAHIRO ICHIHASHI , KENYA KONDOU , KAZUMASA NISHIMURA , SYOU MITSUISHI , TOSHIO SUZUKI , NOBUHIKO SHIGYO , MASAYUKI KATAKURA , MOTOYASU YANO
摘要： A charge pump circuit by which fundamental issues involved in the voltage feedback type charge pump circuit have been solved is realized. A power supply circuit includes a charge pump circuit, a feedback circuit feeding an output of the charge pump circuit back to an input of the charge pump circuit, a first current source causing a constant current to flow through the feedback circuit, a MOS transistor element interposed in a middle of the feedback circuit, a resistor element interposed at a position closer to the output of the charge pump circuit than the MOS transistor element in the feedback circuit, a bias circuit applying a constant voltage to a control terminal of the MOS transistor element, and a control section controlling a value of the constant current which the first current source flows through the feedback circuit.
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公开(公告)号：US20210152083A1
公开(公告)日：2021-05-20
申请号：US16611922
申请日：2018-05-01
发明人： MASAHIRO ICHIHASHI , KENYA KONDOU , KAZUMASA NISHIMURA , SYOU MITSUISHI , TOSHIO SUZUKI , NOBUHIKO SHIGYO , MASAYUKI KATAKURA , MOTOYASU YANO
摘要： An object of the present technology is to stably operate a power supply circuit. A charge switch is connected to a first terminal of a capacitor and charges the capacitor with an input voltage on the basis of a control signal inputted to a control terminal. A discharge switch is complementary with the charge switch, is connected to the first terminal of the capacitor, and discharges on the basis of the control signal inputted to the control terminal the voltage charged to the capacitor, thereby generating an output voltage. A charge control signal converting section converts a charge control signal that controls the charge into a control signal referenced to the input voltage and inputs the resulting control signal to the control terminal of the charge switch. A discharge control signal converting section converts a discharge control signal that controls the discharge into a control signal referenced to the output voltage and inputs the resulting control signal to the control terminal of the discharge switch. A pulse voltage supplying section supplies a pulse voltage to a second terminal. A control signal generating section exclusively generates the charge control signal and the discharge control signal and supplies the charge control signal and the discharge control signal.
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公开(公告)号：US20230361782A1
公开(公告)日：2023-11-09
申请号：US18245870
申请日：2021-09-27
CPC分类号： H03M1/181 , H03M1/1205 , H03M1/34
摘要： Provided is a low voltage and compact digital control regulator that achieves enhanced stability and reduced variations in ripple voltage and droop characteristics. The digital control regulator includes a first A/D converter configured to generate a first digital signal according to a differential voltage between an output voltage and a first reference voltage, an output stage circuit configured to generate the output voltage, a replica circuit having the same circuit configuration as the output stage circuit and configured to output a replica voltage related to the output voltage, a second A/D converter configured to generate a second digital signal according to a differential voltage between the replica voltage and a second reference voltage, and a control circuit configured to generate a control signal for controlling a gain of the output stage circuit, according to the first digital signal and the second digital signal.
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公开(公告)号：US20230216400A1
公开(公告)日：2023-07-06
申请号：US17996409
申请日：2021-03-10
发明人： KAZUTOSHI ONO , NOBUHIKO SHIGYO , HIDEO MAEDA
摘要： When a bias voltage of a substrate is generated, an output voltage of a charge pump is controlled at an appropriate level, resultingly reducing a consumption current. The charge pump generates a predetermined output voltage from a predetermined DC power supply. A clock generator outputs a clock for operating the charge pump. A voltage monitoring unit monitors the output voltage of the charge pump and controls the clock output from the clock generator such that the output voltage is maintained within a predetermined range. A voltage regulator generates the bias voltage from the output voltage of the charge pump.
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公开(公告)号：US20230074648A1
公开(公告)日：2023-03-09
申请号：US17760403
申请日：2020-12-28
发明人： KAZUTOSHI ONO , NOBUHIKO SHIGYO , HIDEO MAEDA
摘要： The present disclosure provides a touch sensor device that can improve efficiency of acquiring signal components and that can effectively address noise and electromagnetic interference. The touch sensor device includes: a driver unit that drives an electrode having a capacitance that changes due to contact, using a voltage having a waveform of any shape, the voltage gradually changing from a first voltage value that is higher than a reference voltage to a second voltage value that is lower than the reference voltage, and from the second voltage value to the first voltage value; a monitor unit that monitors a drive current obtained by driving the electrode; a rectifying unit that performs full-wave rectification of the current monitored by the monitor unit; and a smoothing unit that smooths the rectified current and converts the rectified current to a current that corresponds to the capacitance of the electrode.
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