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This paper proposes a 3 GHz built-in jitter measurement (BIJM) circuit to measure clock jitter on high-speed transceivers and SoC systems. The proposed BIJM circuit adopts a high timing resolution and self-calibration techniques and discusses the measurement error issues. The measurement error source is analyzed each block in BIJM. To eliminate process variation effects in 3 GHz systems, this study...
This study proposes a output loading effect insensitive and high precision clock synchronization (HPCS) circuit which can accept variable duty cycle clock signal. This HPCS is capable of synchronizing the external clock and the internal clock in 3 clock cycles. By using three innovative techniques, the proposed HPCS can also reduce the clock skew between the external clock and the internal clock in...
A 150-450-MHz, all-digital phase locked-loop (ADPLL) in a 0.1 um CMOS process is presented. The pulse- based digitally controlled oscillator (PB-DCO) performs a high resolution and wide range. The bulk-controlled varactor minimizes jitter performance. The worst case for frequency acquisition is 32 reference clock cycles. The multiplication factor is 2-63. The rms and peak-to-peak jitters are 6.7 ps...
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