发明名称 |
SINGLE MULTI-MODE CLOCK SOURCE FOR WIRELESS DEVICES |
摘要 |
The wireless device described herein uses a single crystal oscillator to generate the high and low frequency clock signals required by the wireless device during both active and inactive radio communications. An exemplary multi-mode clock unit comprises a single crystal oscillator operable in a normal power mode and a reduced power mode, and a control unit that selectively switches the crystal oscillator between the first and second power modes based on a current clock signal quality requirement. The control unit may selectively switch between the first and second power modes by selectively varying a capacitive load of the crystal oscillator and/or by varying a drive signal of the crystal oscillator. For example, the control unit may select the normal power mode when a cellular transceiver is active, and a reduced power mode when the cellular transceiver is inactive to reduce power consumption during the inactive state. |
申请公布号 |
EP2195930(A1) |
申请公布日期 |
2010.06.16 |
申请号 |
EP20080804551 |
申请日期 |
2008.09.22 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
PETTY, JOHN STEWART;UPPATHIL, SATISH;KLEMMER, NIKOLAUS |
分类号 |
H04B1/16 |
主分类号 |
H04B1/16 |
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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