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1. 发明授权

US11606051B2 Motor driving circuit, integrated circuit device, electronic apparatus, and motor control method 有权
公开(公告)号：US11606051B2
公开(公告)日：2023-03-14
申请号：US17083756
申请日：2020-10-29
申请人： SEIKO EPSON CORPORATION
发明人： Motoaki Nishimura , Haruo Hayashi , Makoto Katase , Yusuke Sano
IPC分类号： H02P8/04 , H02P8/24 , H02P8/12
摘要： A motor driving circuit includes a stepping motor driving circuit that controls driving of a stepping motor, a DC motor driving circuit that controls driving of a DC motor, and a control circuit that controls the stepping motor driving circuit and the DC motor driving circuit. The control circuit, upon accepting a driving instruction for driving the stepping motor in the middle of the DC motor driving circuit performing driving of the DC motor, stops driving of the DC motor by the DC motor driving circuit, and starts driving of the stepping motor by the stepping motor driving circuit.

2. 发明申请

US20210126530A1 CIRCUIT DEVICE, POWER SUPPLY DEVICE, AND ELECTRONIC APPARATUS 有权
公开(公告)号：US20210126530A1
公开(公告)日：2021-04-29
申请号：US17081281
申请日：2020-10-27
申请人： SEIKO EPSON CORPORATION
发明人： Makoto Katase , Haruo Hayashi , Motoaki Nishimura , Yusuke Sano , Yoshifumi Sakamoto
IPC分类号： H02M3/156 , G01R19/165 , H03K5/24
摘要： A circuit device includes a pulse signal output circuit and a driving circuit. The pulse signal output circuit, when a detection voltage has decreased below a reference voltage, changes a pulse signal to an active level at which a switching element is turned on. The pulse signal output circuit, after the detection voltage has decreased below the reference voltage, performs monitoring as to whether or not the detection voltage has exceeded the reference voltage, and upon detecting that the detection voltage has exceeded the reference voltage, changes the pulse signal to an inactive level at which the switching element is turned off. The driving circuit outputs a driving signal based on the pulse signal to the switching element.

3. 发明申请

US20210135607A1 MOTOR DRIVING CIRCUIT, INTEGRATED CIRCUIT DEVICE, AND ELECTRONIC APPARATUS 有权
公开(公告)号：US20210135607A1
公开(公告)日：2021-05-06
申请号：US17083744
申请日：2020-10-29
申请人： SEIKO EPSON CORPORATION
发明人： Haruo Hayashi , Motoaki Nishimura , Makoto Katase , Yusuke Sano
IPC分类号： H02P5/68
摘要： A motor driving circuit includes a first motor driving circuit that controls driving of a first motor is disposed, a second motor driving circuit that controls driving of a second motor is disposed, and a constant current generation circuit that generates a constant current is disposed, and the constant current generation circuit is disposed at a position deviating from between the first motor driving circuit and the second motor driving circuit.

4. 发明授权

US11476756B2 Pulse width modulation circuit 有权
公开(公告)号：US11476756B2
公开(公告)日：2022-10-18
申请号：US17081281
申请日：2020-10-27
申请人： SEIKO EPSON CORPORATION
发明人： Makoto Katase , Haruo Hayashi , Motoaki Nishimura , Yusuke Sano , Yoshifumi Sakamoto
IPC分类号： H02M3/156 , G01R19/165 , H03K5/24 , H02M1/00
摘要： A circuit device includes a pulse signal output circuit and a driving circuit. The pulse signal output circuit, when a detection voltage has decreased below a reference voltage, changes a pulse signal to an active level at which a switching element is turned on. The pulse signal output circuit, after the detection voltage has decreased below the reference voltage, performs monitoring as to whether or not the detection voltage has exceeded the reference voltage, and upon detecting that the detection voltage has exceeded the reference voltage, changes the pulse signal to an inactive level at which the switching element is turned off. The driving circuit outputs a driving signal based on the pulse signal to the switching element.

5. 发明授权

US11632043B2 Circuit device 有权
公开(公告)号：US11632043B2
公开(公告)日：2023-04-18
申请号：US17706853
申请日：2022-03-29
申请人： Seiko Epson Corporation
发明人： Katsumi Inoue , Yusuke Sano , Motoaki Nishimura
IPC分类号： H02M3/07 , H02H3/20 , H02M1/32 , H03K17/082
摘要： A circuit device includes a regulator, a charge pump circuit, an overvoltage detection circuit, and a control circuit. The regulator regulates a power supply voltage. The charge pump circuit outputs, a gate control voltage, to a gate node of an N-type transistor provided between a power supply node and a load, based on a regulated voltage. The overvoltage detection circuit detects an overvoltage of the regulated voltage. The control circuit controls to stop the charge pump circuit when the overvoltage is detected by the overvoltage detection circuit.

6. 发明授权

US11269367B2 Voltage regulator 有权
公开(公告)号：US11269367B2
公开(公告)日：2022-03-08
申请号：US17024861
申请日：2020-09-18
申请人： Seiko Epson Corporation
发明人： Yusuke Sano
IPC分类号： G05F1/575 , G05F1/59
摘要： A voltage regulator that outputs, from an output terminal, as an output voltage, a power supply voltage that is input from an input terminal, the voltage regulator including an error amplifier that includes a constant current source that causes a current that is based on a constant current supplied from an outside to flow, and outputs a signal that is based on a difference between a feedback voltage obtained by dividing the output voltage and a reference voltage, an output transistor that has a source connected to the input terminal, a drain connected to the output terminal, and a gate connected to an output of the error amplifier, a capacitor that has one end connected to the output terminal, a boost transistor that is connected in parallel with the constant current source and that has a gate connected to another end of the capacitor, and a diode that has an anode connected to the other end of the capacitor and a cathode connected to a ground terminal.

7. 发明申请

US20210135610A1 MOTOR DRIVING CIRCUIT, INTEGRATED CIRCUIT DEVICE, ELECTRONIC APPARATUS, AND MOTOR CONTROL METHOD 有权
公开(公告)号：US20210135610A1
公开(公告)日：2021-05-06
申请号：US17083756
申请日：2020-10-29
申请人： SEIKO EPSON CORPORATION
发明人： Motoaki Nishimura , Haruo Hayashi , Makoto Katase , Yusuke Sano
IPC分类号： H02P8/04 , H02P8/12 , H02P8/24
摘要： A motor driving circuit includes a stepping motor driving circuit that controls driving of a stepping motor, a DC motor driving circuit that controls driving of a DC motor, and a control circuit that controls the stepping motor driving circuit and the DC motor driving circuit. The control circuit, upon accepting a driving instruction for driving the stepping motor in the middle of the DC motor driving circuit performing driving of the DC motor, stops driving of the DC motor by the DC motor driving circuit, and starts driving of the stepping motor by the stepping motor driving circuit.

8. 发明申请

US20210089069A1 VOLTAGE REGULATOR 有权
公开(公告)号：US20210089069A1
公开(公告)日：2021-03-25
申请号：US17024861
申请日：2020-09-18
申请人： Seiko Epson Corporation
发明人： Yusuke Sano
IPC分类号： G05F1/575 , G05F1/59
摘要： A voltage regulator that outputs, from an output terminal, as an output voltage, a power supply voltage that is input from an input terminal, the voltage regulator including an error amplifier that includes a constant current source that causes a current that is based on a constant current supplied from an outside to flow, and outputs a signal that is based on a difference between a feedback voltage obtained by dividing the output voltage and a reference voltage, an output transistor that has a source connected to the input terminal, a drain connected to the output terminal, and a gate connected to an output of the error amplifier, a capacitor that has one end connected to the output terminal, a boost transistor that is connected in parallel with the constant current source and that has a gate connected to another end of the capacitor, and a diode that has an anode connected to the other end of the capacitor and a cathode connected to a ground terminal.

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