发明名称 |
Method and apparatus for controlling oscillation frequency |
摘要 |
A method for the determination of a bias current of a quartz oscillator that includes the phases of: defining a series of bias currents of prefixed values; supplying to said quartz oscillator a bias current value not yet used; verifying the presence of an oscillation signal at the output of said quartz oscillator; supplying in the negative case to said quartz oscillator a bias current value not yet used and repeating the preceding phase; verifying the presence of the correct oscillation frequency; supplying in the negative case a bias current not yet used to said quartz oscillator and repeating the phase of verifying the presence of an oscillation signal at the output of said quartz oscillator; storing, in the positive case, that the supplied current is valid; repeating the preceding phases up to the exhaustion of said series of values of bias currents; fixing as a bias current of said quartz oscillator the algebraic average of the currents regarded as valid.
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申请公布号 |
US2004196109(A1) |
申请公布日期 |
2004.10.07 |
申请号 |
US20040754486 |
申请日期 |
2004.01.09 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
ADDUCI FRANCESCO;COLACI ANTONIO |
分类号 |
H03B5/36;(IPC1-7):H03B5/32 |
主分类号 |
H03B5/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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