US 7,583,157 B2Granted

Method of manufacturing a temperature compensated oscillator

AssigneeCitizen Holdings Co., Ltd.

InventorYasuhiro Sakurai

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Abstract

A method of manufacturing a temperature compensated oscillator including the steps of assembling an oscillator in which an IC chip constituting a temperature compensation circuit with an oscillation circuit and a compensation data storage circuit, and a resonator for the oscillation circuit are mounted in a package; adjusting the resonator with an oscillation frequency of the oscillation circuit to a desired oscillation frequency in condition that the oscillator is kept at a reference temperature, in condition that a temperature compensation function of the temperature compensation circuit is disabled; sealing the resonator hermetically; creating temperature compensation data and storing it into the compensation data storage circuit; and enabling the temperature compensation function of the temperature compensation circuit.

Claims9

Dependent claims

A method of manufacturing a temperature compensated oscillator comprising the steps of:

assembling an oscillator in which an IC chip constituting a temperature compensation circuit with an oscillation circuit and a compensation data storage circuit, and a resonator for said oscillation circuit are mounted in a package,
adjusting said resonator so that an oscillation frequency of said oscillation circuit becomes a desired oscillation frequency in condition that a temperature compensation function of said temperature compensation circuit is disabled, said oscillator is kept at a reference temperature, and said resonator and said IC chip are mounted in the package,
sealing said resonator hermetically after said step of adjusting said resonator,
creating temperature compensation data and storing it into said compensation data storage circuit, and
enabling said temperature compensation function of said temperature compensation circuit in condition that the temperature compensation data is stored in said compensation data storage circuit.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/544,622Filed 10 Oct 2006 · division
Priority: JP 2002-1199821 Jan 2002
Published: US 2007/0030084 A18 Feb 2007
Granted: 1 Sep 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H03L 7/183
Using a frequency divider or counter in the loop: a time difference being used for locking the loop, the counter counting between fixed numbers or…
H03L 1/026
By indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature: by using a memory for…
H03L 1/027
By indirect stabilisation, i.e. by generating an electrical correction signal which is a function of the temperature: by using frequency…
H03L 7/18
Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop:…

Family

PCT/JP03/00422Parent of this division · filed 20 Jan 2003
US 2007/0030084 A1Pre-grant publication · published 8 Feb 2007
Application10/501,774Parent of this division
US 2005/0040904 A1Published application
US 7,583,157 B2This patent

From the US filing history. Foreign family members aren’t listed.