公开(公告)号：US20170194971A1

公开(公告)日：2017-07-06

申请号：US15385266

申请日：2016-12-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Takemi YONEZAWA

IPC: H03L7/095 ,  H03L7/091 ,  H03L7/099 ,  H03L1/02 ,  H03B5/32

CPC classification number: H03L7/095 ,  H03B5/32 ,  H03L1/00 ,  H03L1/026 ,  H03L7/091 ,  H03L7/099 ,  H03L7/181 ,  H03L2207/50

Abstract: A circuit device includes an oscillation signal generation circuit, a reference signal input terminal to which a reference signal is input, and an internal phase comparator that performs phase comparison between an input signal based on the oscillation signal and the reference signal. The oscillation signal generation circuit generates the oscillation signal using the frequency control data based on a result of the phase comparison from an external phase comparator which performs phase comparison between an input signal based on the oscillation signal and the reference signal in a first mode, and generates the oscillation signal using the frequency control data based on a result of the phase comparison from the internal phase comparator in a second mode.

公开(公告)号：US20170194967A1

公开(公告)日：2017-07-06

申请号：US15385325

申请日：2016-12-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Takemi YONEZAWA

IPC: H03L1/02 ,  H03B5/32 ,  H03L7/095

CPC classification number: H03L1/026 ,  H03B5/362 ,  H03B5/368 ,  H03L1/00 ,  H03L1/028 ,  H03L7/085 ,  H03L7/099 ,  H03L7/0991 ,  H03L7/14 ,  H03L2207/50

Abstract: A circuit device includes an oscillation signal generation circuit that generates an oscillation signal having an oscillation frequency set by the frequency control data by using a resonator, and a processor that is configured to perform a signal process on input frequency control data to output frequency control data. The processor is configured to obtain a pre-estimated value x̂−(k) at a time step k by adding a post-estimated value x̂(k−1) and a correction value D(k−1) at a time step k−1 together during a process of updating a pre-estimated value in a Karman filter process, and perform aging correction on the frequency control data on the basis of a result of the Karman filter process.

公开(公告)号：US20150268265A1

公开(公告)日：2015-09-24

申请号：US14660160

申请日：2015-03-17

Applicant: Seiko Epson Corporation

Inventor： Takemi YONEZAWA ,  Tetsuhiro YAMADA

IPC: G01P15/00

CPC classification number: G01P15/18 ,  G01P15/036 ,  G01P15/0891

Abstract: An impact detection circuit includes a first detection section adapted to detect presence or absence of an impact input based on a first output signal as an output signal in a first detection axis of an inertial sensor having the first detection axis and a second detection axis different from each other, a second detection section adapted to detect presence or absence of an impact input based on a second output signal as an output signal in the second detection axis, and an impact detection determination section adapted to determine that an impact input has been made in a case in which both of the first detection section and the second detection section have detected the presence of the impact input.

Abstract translation: 冲击检测电路包括：第一检测部分，其适于基于作为第一检测轴的第一检测轴的第一检测轴中的输出信号的第一输出信号检测冲击输入的存在或不存在，所述惯性传感器具有第一检测轴，第二检测轴不同于 彼此相对，第二检测部分，适于基于作为第二检测轴中的输出信号的第二输出信号来检测冲击输入的存在或不存在;以及冲击检测确定部，其适于确定已经进行了冲击输入 第一检测部和第二检测部都检测到冲击输入的存在的情况。