发明名称 |
LOW VOLTAGE FREQUENCY SYNTHESIZER USING THE BOOSTING METHOD SOURCE VOLTAGE OF CHARGE PUMP |
摘要 |
PURPOSE: A low voltage frequency synthesizer is provided to prevent performance deterioration caused by a broadband, low phase noise, external environment, and process deviation by supplying the supply power of a charge pump from a voltage-controlled oscillator. CONSTITUTION: A frequency/phase detector(140) receives and compares a reference frequency and a feedback frequency and outputs comparison signal. A charge pump(110) receives the comparison signal and outputs a current that corresponds to the comparison signal. A low band pass filter(120) generates a voltage in correspondence to the output current of the charge pump. A voltage-controlled oscillator receives the message of the low band pass filter. A DC voltage converter(150) receives the boosting voltage of the voltage-controlled oscillator. |
申请公布号 |
KR20100070978(A) |
申请公布日期 |
2010.06.28 |
申请号 |
KR20090071284 |
申请日期 |
2009.08.03 |
申请人 |
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE;KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY |
发明人 |
LEE, HUI DONG;KIM, KWI DONG;KWON, JONG KEE;HONG, JONG PIL;LEE, SANG GUG |
分类号 |
H03L7/16;H03L7/099 |
主分类号 |
H03L7/16 |
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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