A nonlinear behavior model of a charge-pump based frequency synthesizer is implemented and verified against a transistor level implementation in a mixed circuit simulator. The presented behavior model is shown to be drastically faster while still giving an accurate prediction of the acquisition process. The model reliance is assured by identifying and implementing the nonlinear characteristics ...

Internet of Things (IoT), which is one of the main talking points in the electronics industry today, consists of a number of highly miniaturized sensors and actuators which sense the physical environment around us and communicate that information to a central information hub for further processing. This agglomeration of miniaturized sensors helps the system to be deployed in previously impossib...

Version 4e, August 2006 A methodology is presented for predicting the phase noise of a PLL-based frequency synthesizer using simulation that is both accurate and efficient. The methodology begins by characterizing the phase noise behavior of the blocks that make up the PLL using transistor-level RF noise simulation. For each block, the phase noise is extracted and applied to a phase-domain mode...

The focus of this research has been the development of a low power, radio frequency transmitter architecture. Specifically, a technique for in service automatic calibration of a modulated phase locked loop (PLL) frequency synthesizer has been developed. Phase/frequency modulation is accomplished by modulating the feedback divide value in a phase locked loop frequency synthesizer. A digital prec...

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This paper presents an overview of outstanding theoretical problems in delta-sigma modulator based electronic digital-to-analog circuits and outlines quantization noise conditioning techniques that are being employed to address these problems. Both the problems and the conditioning techniques are described in the context of a special class of electronic circuits called frequency synthesizers.

Direct digital frequency synthesizer based on accumulators and phase registers, normally use fixed period clock signals. This results in synthesized signals having instantaneously varying time period. A technique of time period modification of the clock signal is proposed here to synthesized fixed period signal. The proposed technique is verified via simulation and hardware experiment. INTRODUC...

The design and simulation of a 1.35 GHz fully integrated CMOS frequency synthesizer for a double band receiver is presented. The proposed synthesizer is based in a wide-band PLL topology with a high reference frequency. This approach allows obtaining low phase noise, fast switching time, a low divider ratio and a reduction in the total chip area. Besides, the use of a novel charge-pump circuit ...

We use femtosecond laser frequency combs to convert optical frequency references to the microwave domain, where we demonstrate the synthesis of 10-GHz signals having a fractional frequency instability of < or =3.5 x 10(-15) at a 1-s averaging time, limited by the optical reference. The residual instability and phase noise of the femtosecond-laser-based frequency synthesizers are 6.5 x 10(-16) a...