发明名称 |
Phase-locked loop circuit and radio communication apparatus using the same |
摘要 |
A communication apparatus includes a phase-locked loop circuit which receives a first signal having a frequency and converts the first signal into an output signal having a transmission frequency. The phase-locked loop circuit includes a current output type phase comparator which converts a phase difference between the first signal and a second signal into a current signal, a low pass filter which filters the current signal of the current output type phase comparator to produce an output signal, a voltage controlled oscillator which produces an output signal having a transmission frequency corresponding to the output signal of the low pass filter, the output signal of the voltage controlled oscillator constituting the output signal of the phase-locked loop circuit, and a frequency converter which frequency-converts the output signal of the voltage controlled oscillator to produce the second signal.
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申请公布号 |
US2001008551(A1) |
申请公布日期 |
2001.07.19 |
申请号 |
US20000729721 |
申请日期 |
2000.12.06 |
申请人 |
YAMAWAKI TAIZO;KOKUBO MASARU;FURUYA TOMIO;WATANABE KAZUO;HILDERSLEY JULIAN |
发明人 |
YAMAWAKI TAIZO;KOKUBO MASARU;FURUYA TOMIO;WATANABE KAZUO;HILDERSLEY JULIAN |
分类号 |
H03L7/085;H03L7/10;H03L7/183;H04B1/40;(IPC1-7):H03D3/24 |
主分类号 |
H03L7/085 |
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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