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Method of manufacturing crystal oscillator and the crystal oscillator manufactured by the method

A technology for crystal oscillators and manufacturing methods, which is applied to power oscillators, instruments, electronic timers, etc., and can solve the problems that SPXO crystal oscillators cannot meet this specification.

Inactive Publication Date: 2007-04-11
KAWASAKI MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SPXO crystal oscillators cannot meet this specification

Method used

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  • Method of manufacturing crystal oscillator and the crystal oscillator manufactured by the method
  • Method of manufacturing crystal oscillator and the crystal oscillator manufactured by the method
  • Method of manufacturing crystal oscillator and the crystal oscillator manufactured by the method

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Embodiment Construction

[0024] Various exemplary embodiments of the invention are described below.

[0025] Figure 1 shows an example of a block diagram of an exemplary implementation of a crystal oscillator. As shown in FIG. 1 , a crystal oscillator 1 according to an exemplary embodiment includes a VCXO circuit 2 , a circuit 3 generating a compensation voltage, and a temperature sensor 4 .

[0026] The circuit 3 for generating the compensation voltage generates the compensation voltage according to a predetermined compensation curve including the quintic term, thereby compensating the temperature characteristic of the crystal resonator 2 . The wording "predetermined" means that the compensation curve can be determined before assembling the crystal resonator with the oscillation circuit without measuring the temperature characteristics of the crystal resonator to be assembled.

[0027] Therefore, the crystal oscillator according to this exemplary embodiment can be manufactured without measuring the ...

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Abstract

The method of manufacturing a crystal oscillator that is compensated for temperature with low-cost, and a crystal oscillator that is compensated for temperature by the method is disclosed. A plurality of crystal oscillators are manufactured by preparing a compensation circuit that generates a common compensation voltage in accordance with a predetermined compensation curve expressed by a quintic polynomial of an ambient temperature; and manufacturing each of the plurality of crystal oscillators by integrating the compensation circuit with a voltage controlled oscillation circuit including a crystal resonator, the common compensation voltage generated by the compensation circuit being supplied to the voltage controlled oscillation circuit so that the temperature characteristic of the crystal resonator is compensated.

Description

[0001] Cross References to Related Applications [0002] Exemplary embodiments of the present invention were first described in Japanese Application No. 2005-289654, and priority is claimed from that earlier application, which is incorporated by reference in its entirety. technical field [0003] The present invention relates to a method of manufacturing a temperature compensated crystal oscillator and a crystal oscillator manufactured by the method. Background technique [0004] Demand for crystal oscillators using crystal resonators used as signal generators for supplying constant frequency signals or clock signals to electronic equipment such as telecommunication equipment and the like has recently been increasing. Several crystal oscillators using crystal resonators have been commercialized. One of them is a normal crystal oscillator (SPXO) and the other is a temperature compensated crystal oscillator (TCXO). [0005] SPXOs are crystal oscillators that are neither cont...

Claims

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Application Information

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IPC IPC(8): H03B5/30H03L1/02G04G3/00G04G3/04
CPCH03L1/028H03L1/022H03L1/025
Inventor 松谷雄一有吉龙司
Owner KAWASAKI MICROELECTRONICS
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