Hauptman Ham, LLP
Auto frequency calibration for a phase locked loop and method of use
An apparatus comprises a code generator configured to generate a coarse tuning signal and a reset signal based on a reference frequency and a phase difference signal. The apparatus also comprises a digital loop filter configured to generate a fine tuning signal based on the phase difference signal. The apparatus further comprises a voltage control oscillator configured to generate an output signal based on the coarse tuning signal and the fine tuning signal. The apparatus additionally comprises a divider configured to generate a divider frequency based on a divider control signal and the output signal. The phase difference signal is based, at least in part, on the divider frequency, and the divider is configured to be reset based on the reset signal.
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
H G H H H H H H H H H H
H03L G04F H03L H03L H03M H03L H03L H03L H03M H03L H03L H03L
inventional inventional inventional inventional inventional additional inventional inventional inventional inventional inventional inventional
Chewn-Pu Feng Wei Yen-Jen Huan-Neng
Jou Kuo Chen Chen