发明名称 |
APPARATUS AND METHOD FOR FREQUENCY CALIBRATION IN FREQUENCY SYNTHESIZER |
摘要 |
An apparatus and a method for frequency calibration in a frequency synthesizer are disclosed. The present invention includes an up/down processor. The up/down processor is utilized for outputting one of a GND voltage and a VDD voltage to a voltage-controlled oscillator via a loop filter in an open loop status, or outputting one of a step-up voltage and a step-down voltage in accordance with a phase difference to the voltage-controlled oscillator via the loop filter in a close loop status. When the up/down processor outputs one of the GND voltage and the VDD voltage in the open loop status, a memory bank selector compares frequencies for selecting a value of a memory bank and then adds an offset to the value of the memory bank so as to determine a final value of a VCO memory bank in the phase locked loop. |
申请公布号 |
US2011304367(A1) |
申请公布日期 |
2011.12.15 |
申请号 |
US201113158413 |
申请日期 |
2011.06.11 |
申请人 |
OH SECHANG;LIM KYOOHYUN;KANG KISUB;FCI INC. |
发明人 |
OH SECHANG;LIM KYOOHYUN;KANG KISUB |
分类号 |
H03L7/08 |
主分类号 |
H03L7/08 |
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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