公开(公告)号：US20220352850A1

公开(公告)日：2022-11-03

申请号：US17732902

申请日：2022-04-29

Applicant: Seiko Epson Corporation

Inventor： Kohei BEPPU ,  Takehiro YAMAMOTO

IPC: H03B5/32 ,  H03B5/36 ,  G06F1/04 ,  H03K3/03

Abstract: A circuit apparatus includes an oscillation circuit that generates an oscillation signal, a first buffer circuit that outputs a first clock signal based on the oscillation signal, a second buffer circuit that outputs a second clock signal based on the first clock signal, a first terminal electrically couplable to a first node via which the first buffer circuit outputs the first clock signal, and a second terminal electrically coupled to a second node via which the second buffer circuit outputs the second clock signal, and the rise period of the first clock signal is shorter than the rise period of the second clock signal.

公开(公告)号：US20130257550A1

公开(公告)日：2013-10-03

申请号：US13834702

申请日：2013-03-15

Applicant: SEIKO EPSON CORPORATION

Inventor： Masayuki ISHIKAWA ,  Takehiro YAMAMOTO

IPC: H03L5/00

CPC classification number: H03L5/00 ,  H01L2224/16225 ,  H01L2924/16195 ,  H03L1/022

Abstract: A circuit device includes a current supply circuit adapted to supply an oscillation current, an oscillation circuit having an oscillation transistor for a resonator, and adapted to drive the resonator using the oscillation transistor based on an oscillation current from the current supply circuit, and a control section adapted to control the current supply circuit. If the oscillation circuit is set to an overdrive mode, the oscillation circuit drives the resonator with a higher drive power than the drive power in a normal mode.

Abstract translation: 电路装置包括适于提供振荡电流的电流供给电路，具有用于谐振器的振荡晶体管的振荡电路，并且适于基于来自电流供给电路的振荡电流使用振荡晶体管驱动谐振器，以及控制 适用于控制电流供应电路。 如果振荡电路设置为过驱动模式，则振荡电路在正常模式下以比驱动功率更高的驱动功率驱动谐振器。

公开(公告)号：US20220352852A1

公开(公告)日：2022-11-03

申请号：US17732832

申请日：2022-04-29

Applicant: Seiko Epson Corporation

Inventor： Takehiro YAMAMOTO

IPC: H03B5/36 ,  G05F1/575

Abstract: A circuit device includes an oscillation circuit configured to generate an oscillation signal, a first pre-driver disposed in a posterior stage of the oscillation circuit, a first output driver disposed in a posterior stage of the first pre-driver, a first regulator configured to supply a first regulated voltage to the first pre-driver, and a second regulator configured to supply a second regulated voltage to the first output driver, wherein the second regulator is shorter in transient response time than the first regulator.

公开(公告)号：US20220209717A1

公开(公告)日：2022-06-30

申请号：US17562073

申请日：2021-12-27

Applicant: Seiko Epson Corporation

Inventor： Takehiro YAMAMOTO

IPC: H03B28/00 ,  H03H9/19 ,  G06F1/02

Abstract: A circuit device includes an oscillation circuit configured to oscillate a resonator to thereby generate an oscillation signal, a waveform shaping circuit to which the oscillation signal is input, and which is configured to output a clock signal obtained by performing waveform shaping on the oscillation signal, a first duty adjustment circuit configured to perform a duty adjustment of the clock signal, and an output buffer circuit configured to output a first output clock signal and a second output clock signal to an outside based on the clock signal. The output buffer circuit includes a second duty adjustment circuit configured to perform a duty adjustment of the second output clock signal.

公开(公告)号：US20150130547A1

公开(公告)日：2015-05-14

申请号：US14537094

申请日：2014-11-10

Applicant: Seiko Epson Corporation

Inventor： Masayuki ISHIKAWA ,  Yosuke ITASAKA ,  Takehiro YAMAMOTO ,  Akihiro FUKUZAWA

IPC: H03B5/30 ,  H03B1/00

CPC classification number: H03H9/0547 ,  G01R31/2824 ,  H03B5/32 ,  Y10T29/41

Abstract: A manufacturing method of an oscillator is a manufacturing method of an oscillator which includes a vibrator and a semiconductor circuit device including an oscillation part connected to the vibrator and a control part to switch an operation mode between a normal mode in which the oscillation part performs an oscillation operation and an inspection mode in which characteristics of the vibrator are inspected, and the manufacturing method includes preparing the semiconductor circuit device in which the operation mode is set to the inspection mode, connecting the semiconductor circuit device and the vibrator electrically, and inspecting the characteristics of the vibrator which is in a state electrically connected to the semiconductor circuit device.

Abstract translation: 振荡器的制造方法是振荡器的制造方法，该振荡器包括振动器和包括连接到振子的振荡部分的半导体电路器件，以及控制部分，用于在振荡部件执行的正常模式之间切换操作模式 振动操作和检查振动器的特性的检查模式，并且制造方法包括准备将操作模式设置为检查模式的半导体电路装置，电连接半导体电路装置和振动器，并且检查 处于与半导体电路器件电连接的状态的振动器的特性。

公开(公告)号：US20150116043A1

公开(公告)日：2015-04-30

申请号：US14527006

申请日：2014-10-29

Applicant: Seiko Epson Corporation

Inventor： Yosuke ITASAKA ,  Masayuki ISHIKAWA ,  Takehiro YAMAMOTO ,  Akihiro FUKUZAWA

IPC: H03B5/02 ,  H03B5/32

CPC classification number: H03B5/366 ,  H03B5/362 ,  Y10T29/49007

Abstract: An oscillation circuit includes a terminal XO which is connected to one end of a resonator, a terminal XI which is connected to the other end of the resonator, an oscillation unit which is electrically connected to the terminal XO and the terminal XI, a control voltage generation circuit, and a switch. The oscillation unit includes a variable capacitive element having one end which is connected to the terminal XO or the terminal XI. The switch controls electrical connection between the other end of the variable capacitive element and an output terminal of the control voltage generation circuit.

Abstract translation: 振荡电路包括连接到谐振器的一端的端子XO，连接到谐振器的另一端的端子XI，与端子XO和端子XI电连接的振荡单元，控制电压 发电电路和开关。 振荡单元包括可变电容元件，其一端连接到端子XO或端子XI。 开关控制可变电容元件的另一端与控制电压产生电路的输出端子之间的电连接。

公开(公告)号：US20230208358A1

公开(公告)日：2023-06-29

申请号：US18087056

申请日：2022-12-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Kohei BEPPU ,  Takehiro YAMAMOTO

IPC: H03B5/36 ,  H03B5/04

CPC classification number: H03B5/36 ,  H03B5/04 ,  H03B2200/0088

Abstract: A circuit device includes: an output circuit including a waveform-shaping circuit of an oscillation signal and configured to output an output clock signal based on a clock signal subjected to waveform-shaping; a bias voltage output circuit configured to output a bias voltage of the oscillation signal input to the waveform-shaping circuit; a comparator configured to compare a DC voltage obtained by smoothing the clock signal subjected to the waveform-shaping with a reference voltage; a logic circuit configured to set an adjustment value of the bias voltage; and a storage circuit. In a test mode, the logic circuit changes the adjustment value to determine a set value of the adjustment value based on output of the comparator when the adjustment value is changed, and stores the determined set value in the storage circuit.

公开(公告)号：US20180316355A1

公开(公告)日：2018-11-01

申请号：US15958311

申请日：2018-04-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Takehiro YAMAMOTO

IPC: H03L3/00 ,  G06F1/04 ,  H03L1/02 ,  H03L5/02

CPC classification number: H03L3/00 ,  G06F1/04 ,  H03L1/02 ,  H03L5/02

Abstract: A circuit device includes a first oscillation circuit, a second oscillation circuit, a clock signal output circuit adapted to output a clock signal based on an output signal of the first oscillation circuit, and an output control circuit adapted to perform output control of the clock signal output circuit. The output control circuit includes a counter circuit adapted to perform a counting process based on an output signal of the second oscillation circuit, and the counter circuit outputs an output enable signal of the clock signal to the clock signal output circuit based on a result of the counting process.

公开(公告)号：US20180108627A1

公开(公告)日：2018-04-19

申请号：US15726812

申请日：2017-10-06

Applicant: Seiko Epson Corporation

Inventor： Takehiro YAMAMOTO ,  Masayuki ISHIKAWA

IPC: H01L23/00 ,  H03B5/04 ,  H03B5/36 ,  H01L27/02 ,  H01L23/31

Abstract: A circuit device includes a first pad and a second pad that are disposed in a first pad disposition region along a first side; a third pad and a fourth pad that are disposed in a second pad disposition region along a second side which faces the first side; and a first to fourth electrostatic protection circuits that are disposed in a circuit disposition region between the first pad disposition region and the second pad disposition region and are connected to the first to fourth pads.

公开(公告)号：US20180107238A1

公开(公告)日：2018-04-19

申请号：US15725713

申请日：2017-10-05

Applicant: Seiko Epson Corporation

Inventor： Takehiro YAMAMOTO

IPC: G06F1/04 ,  H03K5/19 ,  H03B5/36

CPC classification number: G06F1/04 ,  H03B5/06 ,  H03B5/36 ,  H03B5/362 ,  H03B5/368 ,  H03K3/0307 ,  H03K5/19 ,  H03L1/028

Abstract: A circuit device includes an oscillation circuit, a clock signal output circuit that outputs a clock signal based on an output signal from the oscillation circuit, and an output control circuit. The output control circuit includes a counter circuit that performs a counting process on the basis of the output signal from the oscillation circuit, and a count enable signal generation circuit that outputs a count enable signal for the counter circuit. The counter circuit starts the counting process when the count enable signal becomes active, and outputs an output enable signal for the clock signal to the clock signal output circuit on the basis of a result of the counting process.