A novel frequency-to-voltage converter based phase-locked loop (PLL) is proposed to overcome the inability of a frequency-locked lock phase. The dual-loop PLL adds variable phase-locking capability, such that phase locking angle can vary from 0–360°. additional be applied in data communication form modulation. design targeted for 0.5-?m CMOS process. generates 480 MHz clock reference 15 MHz. In...

This paper describes the design of an All-Digital Phase Locked Loop (AD-PLL) for wireless applications in the WiMAX 3.3– 3.8 GHz bandwidth. The time/digital converter (TDC) sets the in-band noise and it may be responsible for the presence of spurious tones at the PLL output. The TDC is implemented as a delay-locked loop (DLL) to be insensitive to process spreads and it uses a lead-lag phase det...

A 0.8-V CMOS Phase-Locked Loop (PLL) has been designed and fabricated by using a 0.13-μm 1p8m CMOS process. In the proposed PLL, the double-positive-feedbacks voltage-controlled oscillator (DPF-VCO) is used to generate current signals for the coupling current-mode injection-locked frequency divider (CCMILFD) and currentinjection current-mode logic (CICML) divider. A short-pulsed-reset phase fre...

This paper presents an all-digital phase-locked loop (PLL) using a voltage-domain digitization realized by an analog-to-digital converter (ADC). It consists of an 18b Class-C digitally-controlled oscillator (DCO), 4b comparator, digital loop filter (DLF), and frequency-locked loop (FLL). Implemented in 65nm CMOS technology, the proposed PLL reaches an in-band phase noise of -112dBc/Hz and an RM...

The aim of this paper is to minimize output phase noise for the pure signal synthesis in the frequency synthesizers. For this purpose, first, an exact mathematical model of phase locked loop (PLL) based frequency synthesizer is described and analyzed. Then, an exact closed-form formula in terms of synthesizer bandwidth and total output phase noise is extracted. Based on this formula, the phase ...

This paper discusses a systematic design of a ∑-Δ fractional-N Phase-Locked Loop based on HDL behavioral modeling. The proposed design consists in describing the mixed behavior of this PLL architecture starting from the specifications of each building block. The HDL models of critical PLL blocks have been described in VHDL-AMS to predict the different specifications of the PLL. The effect of di...

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...

The analysis of the behavior Charge Pump Phase-Locked Loop (CP-PLL) is a challenging task due to its mixed-signal architecture. Out two types, i.e. Current Switched CP-PLL (CSCP-PLL) and Voltage (VSCP-PLL), prior produces symmetrical pump currents, resulting in an appropriate transient performance be analyzed. loop parameters are important set gain, target frequency, assure stability system. mo...

This paper presents a novel approach to obtain fast locking PLL by embedding a nonlinear element in the loop of PLL. The nonlinear element has a general parametric Taylor expansion. Using genetic algorithm (GA) we try to optimize the nonlinear element parameters. Embedding optimized nonlinear element in the loop shows enhancements in speed and stability of PLL. To evaluate the performance of th...

The phase-locked loop (PLL) is applied in grid-tied systems to synchronise converter operation with grid voltage, affecting stability and performance. Synchronous reference frame PLL (SRF-PLL) a popular synchronisation method due its simplicity reliability. Normal SRF-PLL cannot suppress DC offset, causing basic frequency phase oscillations.When irregular, bandwidth should be reduced ensure acc...