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In order to determine position, GPS receiver needs to know navigation message which is obtained by demodulating received signal. Demodulating process requires the local harmonic signal and received signal must have pretty good phase alignment. So the phase locked loop is employed to track phase of received signal. This paper implements the phase locked loop to track the GPS signal. Basic principle...
A spread spectrum clock generator (SSCG) based on an offset phase-locked loop (OPLL) for the Serial AT Attachment 3 (SATA-III) is presented in this paper. The SSCG can be applied to many systems due to its characteristic of spreading the energy of frequency harmonics and reducing the radiated power per unit bandwidth. In the proposed architecture, a low-frequency spread spectrum signal is synthesized...
A new low-jitter polyphase-filter-based frequency multiplier incorporating a phase error calibration circuit to reduce the phase errors is presented. Designing with a multiplication ratio of eight, it has been fabricated in a 0.13-mum CMOS process. For input frequency of 25 MHz, the measured jitter is 2.46 ps (rms) and plusmn9.33 ps (pk-pk) at 200-MHz output frequency, while achievable maximum static...
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