公开(公告)号：US20220209716A1

公开(公告)日：2022-06-30

申请号：US17562065

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 which is electrically coupled to a first node to electrically be coupled to one end of a resonator and a second node to electrically be coupled to another end of the resonator, and is configured to oscillate the resonator to generate an oscillation signal, and a waveform shaping circuit which is coupled to the first node, to which the oscillation signal is input from the first node, and which is configured to output a clock signal obtained by performing waveform shaping on the oscillation signal, and a duty adjustment circuit configured to supply the first node with a bias voltage which is variably adjusted based on adjustment data to thereby adjust a duty ratio of the clock signal.

公开(公告)号：US20180145629A1

公开(公告)日：2018-05-24

申请号：US15814763

申请日：2017-11-16

Applicant: Seiko Epson Corporation

Inventor： Takehiro YAMAMOTO ,  Masayuki ISHIKAWA

IPC: H03B5/04 ,  H03B5/20

CPC classification number: H03B5/04 ,  H03B5/20 ,  H03B5/362 ,  H03B2200/0034 ,  H03B2200/0038 ,  H03B2200/004 ,  H03B2200/0046 ,  H03L1/028

Abstract: A circuit device includes an oscillation circuit configured to cause a resonator to oscillate, a clock signal output circuit configured to output a clock signal based on an oscillation signal from the oscillation circuit, a temperature compensation circuit configured to perform temperature compensation on an oscillation frequency of the oscillation signal, a low-potential-side power supply pad to which low-potential-side electric power is supplied, a high-potential-side power supply pad to which high-potential-side electric power is supplied, and an inter-power-supply capacitor provided between a low-potential-side power supply line electrically continuous with the low-potential-side power supply pad and a high-potential-side power supply line electrically continuous with the high-potential-side power supply pad. The inter-power-supply capacitor is formed of at least two metal layers provided in a region where the temperature compensation circuit is disposed in a plan view.

公开(公告)号：US20160218719A1

公开(公告)日：2016-07-28

申请号：US14993733

申请日：2016-01-12

Applicant: SEIKO EPSON CORPORATION

Inventor： Takehiro YAMAMOTO

IPC: H03L1/02 ,  H03B5/36

CPC classification number: H03L1/02 ,  H03B5/04 ,  H03B5/362 ,  H03B5/364 ,  H03B5/368

Abstract: A semiconductor circuit device includes an oscillation circuit, an output circuit that receives a signal output from an oscillation circuit and outputs an oscillation signal, a temperature sensing element, a characteristic adjustment circuit that adjusts characteristics of the oscillation circuit on the basis of a signal output from the temperature sensing element, and a first connection terminal that is electrically connected to the output circuit and via which the oscillation signal is output, in which a distance between the output circuit and the first connection terminal is shorter than a distance between the temperature sensing element and the first connection terminal in a plan view.

Abstract translation: 一种半导体电路装置，包括振荡电路，输出电路，接收从振荡电路输出的信号并输出​​振荡信号，温度感测元件，特性调整电路，其基于信号输出调整振荡电路的特性 以及与所述输出电路电连接并输出振荡信号的第一连接端子，其中所述输出电路和所述第一连接端子之间的距离比所述温度感测之间的距离短 元件和平面图中的第一连接端子。

公开(公告)号：US20150180410A1

公开(公告)日：2015-06-25

申请号：US14576634

申请日：2014-12-19

Applicant: Seiko Epson Corporation

Inventor： Takehiro YAMAMOTO

IPC: H03B5/04 ,  H03B5/36

CPC classification number: H03B5/04 ,  H03B5/364 ,  H03B5/366 ,  Y10T29/49117

Abstract: An oscillator circuit includes a circuit for oscillation, a temperature compensated circuit, an output circuit, and an amplitude control circuit. The output circuit outputs an oscillation signal as a signal output from the circuit for oscillation is input. The amplitude control circuit includes an amplitude control portion which controls amplitude of the oscillation signal output by the output circuit, and a heat generation portion into which a DC current is input and which generates heat. The heat generation portion controls the input DC current based on operation states of the circuit for oscillation and the amplitude control portion.

Abstract translation: 振荡电路包括振荡电路，温度补偿电路，输出电路和振幅控制电路。 输出电路输出振荡信号，作为从振荡电路输出的信号输入。 幅度控制电路包括控制由输出电路输出的振荡信号的振幅的振幅控制部分和输入直流电流并产生热量的发热部分。 发热部基于振荡电路的动作状态和振幅控制部来控制输入的直流电流。

公开(公告)号：US20200244223A1

公开(公告)日：2020-07-30

申请号：US16773572

申请日：2020-01-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Takehiro YAMAMOTO

IPC: H03B5/36

Abstract: An oscillation circuit includes a first node, a first switching element, and a second switching element and has a first mode in which the first switching element does not electrically couple the first external connection terminal and the first node and the second switching element does not electrically couple the first node and the second external connection terminal which is electrically coupled to one end of a resonator and a second mode in which the first switching element electrically couples the first external connection terminal and the first node and the second switching element electrically couples the first node and the second external connection terminal, and in the first mode, a voltage of the first node is fixed.

公开(公告)号：US20180269831A1

公开(公告)日：2018-09-20

申请号：US15914324

申请日：2018-03-07

Applicant: SEIKO EPSON CORPORATION

Inventor： Takehiro YAMAMOTO

IPC: H03B5/04 ,  H03B5/36

CPC classification number: H03B5/04 ,  H03B5/364 ,  H03B2200/0062

Abstract: An oscillation circuit that causes a vibrator to oscillate includes a bipolar transistor for oscillation, a P-type transistor having a gate to which a collector voltage of the bipolar transistor is input and a source to which a base of the bipolar transistor is connected, a first current source that supplies a current to the bipolar transistor, and a second current source that supplies a current to the P-type transistor.

公开(公告)号：US20180145694A1

公开(公告)日：2018-05-24

申请号：US15814951

申请日：2017-11-16

Applicant: Seiko Epson Corporation

Inventor： Takehiro YAMAMOTO ,  Masayuki ISHIKAWA

IPC: H03L1/02 ,  H03B5/36 ,  H03B5/04 ,  H03H9/19

CPC classification number: H03L1/025 ,  H03B5/04 ,  H03B5/362 ,  H03B5/368 ,  H03H9/0547 ,  H03H9/19 ,  H03L1/023 ,  H03L1/04

Abstract: An oscillation circuit includes an amplification circuit that causes a resonator to oscillate, and a variable capacitance circuit whose capacitance value is controlled on the basis of a control voltage. The variable capacitance circuit includes a first variable capacitive element in which an inflection point voltage in a change characteristic of a capacitance value for the control voltage is a first voltage, and a second variable capacitive element in which an inflection point voltage in a change characteristic of a capacitance value for the control voltage is a second voltage which is different from the first voltage. A capacitance value of the first variable capacitive element when the control voltage is the first voltage is different from a capacitance value of the second variable capacitive element when the control voltage is the second voltage.

公开(公告)号：US20150116044A1

公开(公告)日：2015-04-30

申请号：US14527052

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 ,  H03L1/00 ,  Y10T29/49007

Abstract: An oscillation circuit includes: an oscillation unit which includes a first terminal and a second terminal connected to a resonator, a third terminal, a fourth terminal to which at least one of a power supply potential and a signal for inspecting the resonator is applied, a first switching unit which switches modes of electrical connection between the first terminal and the third terminal, and a second switching unit which switches modes of electrical connection between the second terminal and the fourth terminal.

Abstract translation: 振荡电路包括：振荡单元，其包括连接到谐振器的第一端子和第二端子，第三端子，施加电源电位和用于检查谐振器的信号中的至少一个的第四端子， 第一开关单元，其切换第一端子和第三端子之间的电连接模式;以及第二开关单元，其切换第二端子和第四端子之间的电连接模式。

公开(公告)号：US20240313704A1

公开(公告)日：2024-09-19

申请号：US18602077

申请日：2024-03-12

Applicant: SEIKO EPSON CORPORATION

Inventor： Takehiro YAMAMOTO

IPC: H03B5/36

CPC classification number: H03B5/36 ,  H03B2200/0088

Abstract: Provided is a circuit device including: an oscillation circuit configured to generate an oscillation signal; a waveform shaping circuit configured to shape the oscillation signal into a clock signal having a rectangular wave; a low-pass filter configured to smooth the clock signal and generate a detection voltage corresponding to a duty of the clock signal; and a differential amplifier configured to output a bias voltage based on a difference between the detection voltage and a reference voltage to an input node of the waveform shaping circuit, in which a unity gain frequency of the differential amplifier is lower than a cutoff frequency of the low-pass filter.

公开(公告)号：US20240291430A1

公开(公告)日：2024-08-29

申请号：US18587089

申请日：2024-02-26

Applicant: SEIKO EPSON CORPORATION

Inventor： Takehiro YAMAMOTO

IPC: H03B5/04 ,  H03B5/24

CPC classification number: H03B5/04 ,  H03B5/24

Abstract: A circuit device includes a clock signal generation circuit that generates a clock signal, an output circuit that outputs an output clock signal based on the clock signal, and a clock terminal that outputs the output clock signal. The circuit device further includes a test terminal, a storage circuit that stores a duty adjustment value, and a duty adjustment circuit that adjusts a duty of the clock signal based on the duty adjustment value. The output circuit outputs a first DC voltage based on a normal rotation signal of the clock signal to the test terminal in a first state. The output circuit outputs a second DC voltage based on a reverse rotation signal of the clock signal to the test terminal in a second state.