发明名称 |
Method and apparatus for precise open loop tuning of reference frequency within a wireless device |
摘要 |
A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when the communications subsystem operates in closed loop mode. The subsystem further includes an open loop frequency correction means that that samples values of the reference frequency adjustment signal during the closed loop mode and generates a frequency correction signal for correcting the reference frequency signal when the communications subsystem operates in a mode other than closed loop mode. |
申请公布号 |
US8295403(B2) |
申请公布日期 |
2012.10.23 |
申请号 |
US20090362569 |
申请日期 |
2009.01.30 |
申请人 |
CHAN WEN-YEN M.;JIN XIN;JIAO QINGZHONG;KHAN NASSERULLAH;SANGARY NAGULA THARMA;RESEARCH IN MOTION LIMITED |
发明人 |
CHAN WEN-YEN M.;JIN XIN;JIAO QINGZHONG;KHAN NASSERULLAH;SANGARY NAGULA THARMA |
分类号 |
H03D3/18;H03D3/24 |
主分类号 |
H03D3/18 |
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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