Integrated circuit device, oscillator, electronic device, and vehicle

Patent metadata

Field	Value
Publication number	US-10998907-B2
Application number	US-201916257492-A
Country	US
Kind code	B2
Filing date	Jan 25, 2019
Priority date	Jan 26, 2018
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

An integrated circuit device includes a digital signal processing circuit that generates frequency control data by performing a temperature compensation process by a neural network calculation process based on temperature detection data and an amount of change in time of the temperature detection data, and an oscillation signal generation circuit that generates an oscillation signal of a frequency set by the frequency control data using a resonator.

First claim

What is claimed is:

1. An integrated circuit device, comprising:
a digital signal processing circuit that generates frequency control data by performing a temperature compensation process using a neural network calculation process based on temperature detection data and an amount of change in time of the temperature detection data;
an oscillation signal generation circuit that generates an oscillation signal of a frequency set by the frequency control data using a resonator;
a drive circuit that drives the resonator;
a first oscillation terminal coupled to one of an input node or an output node of the drive circuit;
a second oscillation terminal coupled to the other of the input node or the output node of the drive circuit;
a power supply terminal where a power supply voltage is supplied;
an output terminal from which the oscillation signal is output; and
a first temperature sensor that generates the temperature detection data,
wherein a distance between the first temperature sensor and the first oscillation terminal is smaller than at least one of a distance between the first temperature sensor and the power supply terminal or a distance between the first temperature sensor and the output terminal.

2. The integrated circuit device according to claim 1 , further comprising:
a second temperature sensor,
wherein a distance between the second temperature sensor and the second oscillation terminal is smaller than at least one of a distance between the second temperature sensor and the power supply terminal or a distance between the second temperature sensor and the output terminal.

3. The integrated circuit device according to claim 1 , further comprising:
a third temperature sensor; and
a support terminal in which an electrode for supporting the resonator is disposed,
wherein a distance between the third temperature sensor and the support terminal is smaller than at least one of a distance between the third temperature sensor and the power supply terminal or a distance between the third temperature sensor and the output terminal.

4. The integrated circuit device according to claim 1 , further comprising:
a third temperature sensor; and
a support terminal in which an electrode for supporting a relay substrate on which the resonator is mounted is disposed,
wherein a distance between the third temperature sensor and the support terminal is smaller than at least one of a distance between the third temperature sensor and the power supply terminal or a distance between the third temperature sensor and the output terminal.

5. The integrated circuit device according to claim 1 ,
wherein the digital signal processing circuit performs the temperature compensation process based on a result of temperature compensation calculation using polynomial approximation and a result of the neural network calculation process.

6. The integrated circuit device according to claim 5 ,
wherein the digital signal processing circuit obtains a temperature estimation value of the resonator by the neural network calculation process and performs the temperature compensation calculation based on the polynomial approximation using the obtained temperature estimation value.

7. The integrated circuit device according to claim 6 ,
wherein the digital signal processing circuit
obtains the temperature estimation value by a first neural network calculation process based on the temperature detection data and the amount of change in time,
obtains first frequency control data by a second neural network calculation process based on the temperature estimation value,
obtains second frequency control data by the temperature compensation calculation based on the polynomial approximation, and
obtains the frequency control data based on the first frequency control data and the second frequency control data.

8. The integrated circuit device according to claim 6 ,
wherein the digital signal processing circuit
obtains the temperature estimation value and first frequency control data by third neural network calculation based on the temperature detection data and the amount of change in time,
obtains second frequency control data by the temperature compensation calculation based on the polynomial approximation, and
obtains the frequency control data based on the first frequency control data and the second frequency control data.

9. An electronic device comprising:
the integrated circuit device according to claim 1 .

10. A vehicle comprising:
the integrated circuit device according to claim 1 .

11. An oscillator comprising:
a resonator; and
an integrated circuit device including:
a digital signal processing circuit that generates frequency control data by performing a temperature compensation process using a neural network calculation process based on temperature detection data and an amount of change in time of the temperature detection data;
an oscillation signal generation circuit that generates an oscillation signal of a frequency set by the frequency control data using the resonator;

a drive circuit that drives the resonator;
a first oscillation terminal coupled to one of an input node or an output node of the drive circuit;
a second oscillation terminal coupled to the other of the input node or the output node of the drive circuit;
a power supply terminal where a power supply voltage is supplied;
an output terminal from which the oscillation signal is output; and
a first temperature sensor that generates the temperature detection data,
wherein a distance between the first temperature sensor and the first oscillation terminal is smaller than at least one of a distance between the first temperature sensor and the power supply terminal or a distance between the first temperature sensor and the output terminal.

12. An integrated circuit device comprising:
first to N-th (N is an integer greater than or equal to two) temperature sensors;
an A/D conversion circuit that performs A/D conversion on first to N-th temperature detection voltages from the first to N-th temperature sensors and outputs first to N-th temperature detection data;
a digital signal processing circuit that generates frequency control data by performing a temperature compensation process by a neural network calculation process based on an amount of change in time of i-th (i is an integer satisfying 1≤i≤N) temperature detection data of the first to N-th temperature detection data;
an oscillation signal generation circuit that generates an oscillation signal of an oscillation frequency corresponding to the frequency control data using a resonator;
a drive circuit that drives the resonator;
a first oscillation terminal coupled to one of an input node or an output node of the drive circuit;
a second oscillation terminal coupled to the other of the input node or the output node of the drive circuit;
a power supply terminal where a power supply voltage is supplied;
an output terminal from which the oscillation signal is output; and
a first temperature sensor that generates the temperature detection data,
wherein a distance between the first temperature sensor and the first oscillation terminal is smaller than at least one of a distance between the first temperature sensor and the power supply terminal or a distance between the first temperature sensor and the output terminal.

Assignees

• Seiko Epson Corp

Inventors

• Sudo Yasuhiro
• Haneda Hideo

Classifications

• G06N3/048

  Activation functions · CPC title

• G06N3/045

  Combinations of networks · CPC title

• H03B5/32 Primary

  being a piezoelectric resonator (selection of piezoelectric material H10N30/00) · CPC title

• G06N3/0499

  Feedforward networks · CPC title

• G06N3/09

  Supervised learning · CPC title