This paper presents a review of phase locked loop (PLL) techniques. The different types of phase detector, loop filter and oscillators are discussed. It alleviates the problems associated with the classical analog PLL. Linear PLL, Digital PLL and All digital PLL models are implemented in Simulink Simulation results in Simulink gives the performance overview of the three types of PLL. Keywords— ...

The traditional analog signal processing is expected to progressively substituted by the processing times of the digital domain in the VLSI .Within this novel paradigm ,digitally controlled delay lines should play the vital role in the digital-toanalog converters ,and in analog intensive circuits. From a practical point of view, nowadays, DCDL is a key block in the many applications like All Di...

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...

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 digital implementation of a new technique that delivers an extremely accurate and stable phase locked loop system (PLL) is presented. The new technique uses competing phase and frequency loops to incorporate an accurate local reference frequency into the phase locked loop structure. Disturbances on the phase loop caused by the digital frequency loop are identified and a method to mitigate the...

A method for shortening of the settling time in all digital phase-locked loops is proposed. The method utilizes self monitoring to obtain the parameters necessary for feed-forward compensation. Analysis shows that by employing this technique both fast settling and good stability can be achieved simultaneously. Matlab and Verilog-AMS simulation shows that typical settling speed can be reduced to...