phase-locked loopRing oscillator (RO)-based digital phase-locked loops (DPLLs) are very attractive for system-on-chip applications due to their tuning range, good phase noise property but suffer from compactness and power requirements. In this work, the concept of capacitive boosting as one of...
Self-biased bipolar ring-oscillator phase-locked loops with a wide tuning range are disclosed. In a particular example, an apparatus to provide a phase-locked loop is described, comprising a voltage-controlled oscillator (VCO) to provide an output clock signal having a frequency, a quantizer, a...
f noise is demonstrated. Several new design insights are given for low jitter/phase-noisedesign. Good agreement between theory and measurements is observed. Index Terms—Design methodology, jitter, noise measurement, oscillator noise, oscillator stability, phase jitter, phase-locked loops, phase noise...
The designing of the ring oscillator can be done using three inverters. If the oscillator is employed with a single-stage, then the oscillations & gain are not sufficient. If the oscillator has two inverters, then the oscillation and gain of the system are a little bit more than the single...
where represents the noise current injected into the node of interest. Note that the integration arises from the closed-loop nature of the oscillator. The single-sideband phase-noise spectrum due to a white-noise current source is given by [16] ...
Index Terms—Design methodology,jitter,noise measurement, oscillator noise,oscillator stability,phase jitter,phase-locked loops,phase noise,ring oscillators,voltage-controlled oscillators.I.I NTRODUCTION D U E to their integrated nature,ring oscillators have be- come an essential building block in many ...
1.2–17.6 GHz Ring-Oscillator-Based Phase-Locked Loop with Injection Locking in 65 nm Complementary Metal Oxide Semiconductor A wide-frequency-range phase-locked loop (PLL) with subharmonic injection locking is proposed. The PLL is equipped with a wide tunable ring-type voltage-co... Sang-yeop,...
An improved CMOS ring oscillator PLL with less than 4ps RMS accumulated jitter This paper describes a low jitter phase-locked-loop (PLL) with a 4th order control path, and a dual control voltage ring oscillator. Near constant voltage ... S Williams,H Thompson,M Hufford,... - IEEE Custom...
Voltage-ControlledOscillator(VCO)isthecorepartofPhase-LockedLoop(PLL)and wirelesscommunicationsystem.Thephasenoise,frequencyrangeandotherparametersof VCOnotonlyplayadecisiveroleinthePLLperformance,butalsoinfluencethefunctionof thewholewirelesscommunicationsystem.Withthedevelopmentofintegratedcircuits,there ...
In this paper, an analytical model of a closed-loop frequency-locked loop (FLL) based on a two-stage voltage-controlled oscillator (VCO) is proposed. Switch capacitor technology is used to accelerate the conversion speed of the frequency-to-voltage converter for reducing the locking time. The ...