In this paper a new phase-frequency detector is proposed using transmission gates which can detect phase difference less than 500ps. In other word, the proposed Phase-frequency Detector (PFD) can work in frequencies higher than 1.7 GHz, whereas a conventional PFD operates at frequencies less than 1.1 GHz. This new architecture is designed in TSMC 0.13um CMOS Technology. Also, the proposed PFD a...

Techniques are proposed to dramatically reduce the impact of quantization noise in fractional-N synthesizers, thereby improving the existing tradeoff between phase noise and bandwidth that exists in these systems. The key innovation is the introduction of new techniques to overcome nonidealities in a phase-frequency detector (PFD)/digital-to-analog converter (DAC) structure, which combines the ...

The phase frequency detector has been designed for high frequency phase locked loop in 180 nm CMOS Technology with 1.8V supply voltage using CADENCE Spectre tool. A Virtuoso Analog Design Environment and Virtuoso LayoutXL tools of Cadence have used to design and simulate schematic and layout of phase frequency detector respectively. Architecture of phase frequency detector (PFD) has simulated t...

phase sensitive detector described here has two principal applications: a- to produce a d.c out put proportional to- the amplitude of an incoming a,c signal and indicate, by the outut polarity, the phase of the signal with respect to an internal reference. b- to detect the presence of a signal of known phase and frequency which would otherwise be lost in «background noise» and to measure its am...

We describe a type of phase and frequency detector employing both an analog phase detector and a digital phase and frequency detector. The analog and digital detectors are mutually exclusive so that only one of them is active at any given time, resulting in a phase detector with both the broad capture range of digital circuits and the high speed and low noise of analog mixers. The detector has ...

   Nowadays, one of the most important blocks in telecommunication circuits is the frequency synthesizer and the frequency multipliers. Phase-frequency detectors are the inseparable parts of these circuits. In this paper, it has been attempted to design two new structures for phase-frequency detectors in QCA nanotechnology. The proposed structures have the capability of detecting the phase ...

By the using of MCML circuits, a 4 GB/s clock non-sequential phase detector circuit is designed in a 0.35μm CMOS technology. The power dissipation of proposed phase detector is much smaller than the conventional complementary pass transistor logic (CPL) phase detector. The implemented MCML phase detector consumes 0.7688nW when operating upto 4GHz clock frequency with 3.3V supply voltage. The co...