发明名称 |
Procedure for forming frequencies of a digital radio telephone |
摘要 |
A procedure is utilized for forming the transmission and reception frequencies required for the operation of a digital radio telephone based on time division multiplex access, in particular, in a radio telephone for the GSM system. According to the procedure, the mixer frequencies used in the transmitter and the receiver of the radio telephone are formed by a synthesizer and a basic oscillator commmon to both the receiver and transmitter. The clock frequency for the logic of the radio telephone and the RF reference frequency to the synthesizer are produced by dividing the output frequency of the common basic oscillator.
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申请公布号 |
US5291474(A) |
申请公布日期 |
1994.03.01 |
申请号 |
US19920875545 |
申请日期 |
1992.04.27 |
申请人 |
NOKIA MOBILE PHONES LTD. |
发明人 |
IKONEN, RAIMO;LONKA, PEKKA;MIKKOLA, PEKKA |
分类号 |
H03D7/16;H04B1/40;(IPC1-7):H04B1/50 |
主分类号 |
H03D7/16 |
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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