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The PLL implementing with the conventional Phase/ Frequency Detector (C-PFD) with feedback-path approach suffers from a dead-zone problem is generally resulted in slow acquisition time. A reasonably wider concurrent pulse is required to achieve a dead-zone free detection. The wider concurrent pulse implies the slow acquisition time PLL. This study presents a novel forward Phase Detector (fPD). The...
This paper describes and resolves the false locking issue in phase-locked loops (PLLs) with π-phase detector. In order to verify the proposed approach for acquisition and capture range performances of π-phase detector, the phase-controlled-current-source (PCCS) using the reversing scheme is implemented in TSMC 0.18μm 1P6M CMOS technology. In the simulation results, the locking time of the proposed...
An edge missing compensator (EMC) is proposed to approach the function of an ideal PD with plusmn2 N-1 times 2pi linear range with N-bit EMC. A PLL implemented with a 9-bit EMC achieves 320 MHz frequency hopping within 10 mus logarithmically which is about 2.4 times faster than the conventional design. The reference spur of the PLL is -48.7 dBc and the phase noise is -88.31dBc/Hz at 10 kHz offset...
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