Hauptman Ham, LLP
Auto frequency calibration method
A method of generating an output signal includes determining a sampling period N according to a number of most significant bits (MSBs) of a divider number control signal. The method also includes determining a first logic value of a control signal by a comparing circuit based on the sampling period N, and generating a coarse tuning signal by a code generating circuit based on a phase difference signal and the control signal. When an M-th least significant bit (LSB) of the number of MSBs of the divider number control signal equals a second logic value, the sampling period N is set based on the M-th LSB of the number of MSBs of the divider number control signal.
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
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Huan-Neng Chewn-Pu Yen-Jen Feng Wei
Chen Jou Chen Kuo