发明名称 |
Mobile station equipment for a mobile radio telephone system |
摘要 |
A mobile station equipment for a mobile radio telephone system uses a voltage-controlled, temperature-compensated crystal oscillator (VC-TCXO) as a reference oscillator for local oscillators in frequency converters which convert an RF signal into IF signals. The oscillation frequency of the VC-TCXO is controlled by counting the second IF information and evaluating its difference from a certain reference value. At reception, the local oscillators have their reference frequency stabilized based on the stable frequency information from the base station. The equipment is compact and has reduced power dissipation and lower manufacturing cost.
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申请公布号 |
US4932072(A) |
申请公布日期 |
1990.06.05 |
申请号 |
US19880196259 |
申请日期 |
1988.05.20 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
TOKO, YOSHIO |
分类号 |
H03J1/00;H03J7/06;H04B1/40 |
主分类号 |
H03J1/00 |
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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