Active type temperature compensation resonator structure

Patent metadata

Field	Value
Publication number	US-9899987-B2
Application number	US-201414560316-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	May 7, 2014
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

An active type temperature compensation resonator structure is provided, including a resonant body and a temperature compensation element embedded in the resonant body for a compensation current to pass therethrough. The temperature compensation element has a specified temperature coefficient of resistance that reflects the temperature of the resonant body. The magnitude of the compensated current corresponds to the reflected temperature of the resonant body. With the active type temperature compensation resonator structure, the temperature of the resonant body can be accurately reacted by the specified temperature coefficient of resistance, such that the temperature compensation element, through which the compensated current passes, can dynamically correspond to the temperature of the resonant body and accurately provide the resonant body with temperature compensation.

First claim

What is claimed is:

1. An active type temperature compensation resonator structure, comprising:
a resonant body; and
a temperature compensation element embedded in the resonant body for a compensated current to pass therethrough, the temperature compensation element having a specified temperature coefficient of resistance to reflect temperature of the resonant body, wherein the compensated current has a magnitude corresponding to the reflected temperature of the resonant body,
wherein the temperature compensation element comprises:
a temperature sensing unit enabling an external measurement control circuit to determine and reflect the temperature of the resonant body according to the specified temperature coefficient of resistance; and
a temperature controlling unit for the compensated current to pass therethrough, wherein the measurement control circuit automatically adjusts the magnitude of the compensated current when it is determined that the temperature of the resonant body meets a predetermined temperature control condition.

2. The active type temperature compensation resonator structure of claim 1 , wherein the resonant body is in a shape of a tuning fork, a Lame mode, or an extensional bar.

3. The active type temperature compensation resonator structure of claim 2 , wherein the resonant body is in the shape of the tuning fork and has anchor points at two ends of the resonator body.

4. The active type temperature compensation resonator structure of claim 2 , wherein the resonant body is in the shape of the Lame mode and has anchor points at ends of the resonator body.

5. The active type temperature compensation resonator structure of claim 2 , wherein the resonant body is in the shape of the extensional bar and has anchor points at a middle region of the resonator body.

6. The active type temperature compensation resonator structure of claim 1 , wherein the resonant body is made of an electrically insulating material including SiO2, Si3N4 and glass.

7. The active type temperature compensation resonator structure of claim 1 , wherein the measurement control circuit reflects the temperature of the resonant body according to resistance determination of the temperature sensing unit.

8. The active type temperature compensation resonator structure of claim 1 , wherein the specific temperature coefficient of resistance and the temperature of the resonant body are positively correlated or negatively correlated.

9. The active type temperature compensation resonator structure of claim 1 , wherein the resonant body and the temperature compensation element have a wafer stack structure.

Assignees

• Univ Nat Tsing Hua

Inventors

• Li Sheng Shian
• Li ming huang

Classifications

• H03H9/2473

  Double-Ended Tuning Fork [DETF] resonators · CPC title

• H03H9/02448 Primary

  of temperature influence · CPC title

• H03H2009/2442

  Square resonators · CPC title