Phase locked loops find wide application in several modern applications mostly in advance communication and instrumentation systems. PLL being a mixed signal circuit involves design challenge at high frequency. This work analyses the design of a mixed signal phase locked loop for faster phase and frequency locking. The PLL is designed in GPDK090 library of CMOS 90nm process to operate at a freq...

The control system of a doubly-fed adjustable-speed pumped-storage hydropower plant needs phase-locked loops (PLLs) to obtain the phase angle of grid voltage. The main drawback of a comb-filter-based phase-locked loop (CF-PLL) is the slow dynamic response. This paper presents a modified comb-filter-based phase-locked loop (MCF-PLL) by improving the pole-zero pattern of the comb filter, and give...

There is several application of phase locked loop in the field of communication. It depends on the mixed signal operation. It is capable of fast locking capability. present work based on redesign of the PLL system using 90nm technology process at frequency 1 GHz and the lock time is 179.5 ns and transient analysis of the PLL is simulate between 1ns to 1000ns.it consumes the 179.5 mW power at 1....

--The All-Digital Phase-Locked Loop (ADPLL) is digital electronic circuit that are used in modern electronic communication systems like frequency synthesizer, modulator/demodulator etc. This paper presents a review of various ADPLL techniques. The range of input frequency of ADPLL is 40 to 98 MHz; the output frequency may be up to 2.92 to 4 GHz range. The components of ADPLL such as phase detec...

The precision of phase-locked loop (PLL) has a direct effect on the output performance for three-phase grid-connected inverter or three-phase active PFC. In this paper, a new three-phase digital closed-loop phase-locked algorithm is proposed on the basis of synchronous reference frame transformation. Synchronous simulation of the PLL techniques is a good choice even if the polluted three-phase ...

The tracking performance of non-linear amplifier based conventional second order phase locked loop (PLL) and charge pump phase locked loop have been examined numerically by solving the system equations in the presence of lognormal type of fading signal. Some analytical results for non-linear amplifier based conventional phase locked loop and charge pump phase locked loop are also incorporated t...

We present a 500-MHz, ultra-low-power phase-locked loop (PLL) realized with the near-threshold supply voltage of 0.4 V in 65-nm CMOS technology. Our PLL employs a new charge pump (CP) circuit structure that can greatly reduce CP up/down current mismatch and their variation with voltage-controlled oscillator (VCO) control voltages. The PLL consumes only 127.8 μW, which corresponds to power effic...

Phase locked loop (PLL) is a technique which has contributed significantly toward the technology advancement in communication and motor servo control systems. Inventions in PLL schemes combining with novel integrated circuit have made PLL devices important system components. The development of better modular PLL integrated circuit is continuing. As a result, it is expected that it will contribu...

In previous work, we have shown that second-order phase locked loop (PLL) with sinusoidal phase detector characteristics have a separatrix cycle for a certain value of closed loop gain. It was verified that bifurcation from a stable separatrix cycle is the mechanism responsible for breaking the limit cycle associated with the PLL’s out-of lock state and the loop pulls in (phase lock). The value...