All-Digital Phase-Lock Loops (ADPLLs) are widely used for frequency synthesis in modern low-power electronics. They can be found in microprocessors, radio receivers, mobile telephones, GPS systems, etc. In the last two decades, the application of PLLs has expanded beyond the use of a single PLL and now includes PLL based networks. These networks serve for generating a distributed clock signal i...

The Digital controlled oscillator (DCO) is the core element of all digital phase locked loop (ADPLL) system. Here, we propose DCO structures with digital control, reduced hardware and low power consumption. Different DCOs are based on ring based topology having 3, 4 & 5 control bits. Number of control bits can be increased as per the requirement of output frequency range. DCOs using XOR as an i...

Digital controlled oscillators (DCOs) are the core of all digital phase locked loop (ADPLL) circuits. Here, DCO structures with reduced hardware and power consumption having full digital control have been proposed. Three different DCO architectures have been proposed based on ring based topology. Three, four and five bit controlled DCO with NMOS, PMOS and NMOS & PMOS transistor switching networ...

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...

A BiCMOS frequency synthesizer compliant for both Wireless LAN (WLAN) 802.11a and 802.11b standards is presented. Proposed adaptive dual-loop PLL architecture improves reference spur rejection and settling time performance. The synthesizer is fabricated in a 0.25 μm BiCMOS process and dissipates 70 mW from a single 2.5 V supply. It occupies a silicon area of 1.7 mm2. Test-chip measurement resul...

Small Defects defects get cracking usual hinder catechism could vehicle a equipment to behaviour in the compass and thus detecting these defects is often necessary. To lecture this affair, we regard a handful of sign in modes in a avant-garde standard operating procedure supposed AC-plus flip, in which flexible kick the bucket clocks heart be generated on the compare arrive by embedding an all-...