发明名称 |
Frequency shift keying modulator having sigma-delta modulated phase rotator |
摘要 |
A frequency shift keying modulator having sigma-delta modulated phase rotator is disclosed, which includes a phase-locked loop for generating a voltage-controlled signal; a multi-phase generator for receiving the voltage-controlled signal and generating N phase-shift signals having same frequency according to the voltage-controlled signal, the N phase-shift signals having a same phase shift between the phase-shift signals adjacent to each other; a sigma-delta modulator for receiving transmission data and randomly outputting a modulation bit at a modulation clock according to the transmission data; and a phase rotator for receiving the N phase-shift signals and selectively outputting one of the N phase-shift signals and a frequency-divided signal according to the modulation bit, wherein the frequency of the frequency-divided signal is 1 / ( 1 + n N ) of the frequency of any one of the N phase-shift signals.
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申请公布号 |
US7667551(B2) |
申请公布日期 |
2010.02.23 |
申请号 |
US20080127798 |
申请日期 |
2008.05.27 |
申请人 |
NATIONAL TAIWAN UNIVERSITY |
发明人 |
LIN TSUNG-HSIN;LIU YAO-HONG |
分类号 |
H03C3/00;H03K7/06;H04L27/12 |
主分类号 |
H03C3/00 |
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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