Circuits and methods for detecting a lock condition of a phase-locked loop (PLL) circuit are provided. A frequency divider outputs a clock having a frequency equal to a reference clock frequency divided by N. A counter counts the number (M) of clock edges of a PLL output clock received ...
The lock-up time of a PLL frequency synthesizer mainly depends on the total loop gain. Since the gain of the conventional phase detector is constant, it is... S Yasuaki,S Kouichi,O Shigeki,... - 《Ieice Transactions on Fundamentals of Electronics Communications & Computer Sciences》 被引量...
Phase-locked loops (PLL) are widely used for clock recovery in digital communication receivers because they generate a necessary clock signal with relative... J Lee,B Kim - IEEE International Solid-state Circuits Conference 被引量: 64发表: 1999年 A new hybrid phase detector for reduced lock ti...
US6683930 1999年12月23日 2004年1月27日 Cypress Semiconductor Corp. Digital phase/frequency detector, and clock generator and data recovery PLL containing the sameU.S. Appl. No. 09/470,665: " Digital Phase/Frequency Detector, and Clock Generator and Data Recovery PLL Containing the Same, " ...
3. How can i check that 4 important things was right: programming, input signal, voltage lock, digital lock? I think is the digital (phase detector) issue, but as i think if the Vtune voltage is proper, we need just phase detection, but i don't kno...
During reading, the amplitude, timing, and shape of the signal must be controlled before entering the detector. This control is accomplished with a variable gain amplifier (VGA) that regulates the amplitude of the readback signal, a phase-lock loop that tracks changes in the phase and frequency...
for a phase difference between the frequency setting word value and the DCO clock according to the fine phase difference to detect a digital phase error value; a digital loop filter filtering the digital phase error value and controlling PLL operational characteristics; a lock detector generating a...
L. Lacaita, “A 2.9-to-4.0GHz Fractional-N Digital PLL with Bang-Bang Phase Detector and 560fsrms Integrated Jitter at 4.5mW Power,” IEEE J. Solid-State Circuits, vol. 46, no. 12, pp. 2745–2758, Dec. 2011. [2] R. Nonis, W. Grollitsch, T. Santa, D. Cherniak, and N....
A 9.2–12.7 GHz Wideband Fractional-N Subsampling PLL in 28 nm CMOS With 280 fs RMS Jitter This paper describes a fractional-N subsampling PLL in 28 nm CMOS. Fractional phase lock is made possible with almost no penalty in phase noise performance... Raczkowski,K.,Markulic,... - 《Solid...
4568888PLL Fast frequency synthesizer with memories for coarse tuning and loop gain correction1986-02-04Kimura et al.331/10 4563657Frequency synthesizer and digital phase lock loop1986-01-07Qureshi et al.331/25 4538119Clock extraction circuit using an oscillator and phase-locked programmable divider198...