Download 60-GHz CMOS Phase-Locked Loops by Hammad M. Cheema, Reza Mahmoudi, Arthur H.M. van Roermund PDF

By Hammad M. Cheema, Reza Mahmoudi, Arthur H.M. van Roermund

The promising excessive facts cost instant purposes at millimeter wave frequencies in most cases and 60 GHz particularly have won a lot consciousness lately. notwithstanding, demanding situations regarding circuit, format and measurements in the course of mm-wave CMOS IC layout must be conquer ahead of they could turn into attainable for mass market.

60-GHz CMOS Phase-Locked Loops concentrating on phase-locked loops for 60 GHz instant transceivers elaborates those demanding situations and proposes recommendations for them. The procedure point layout to circuit point implementation of the entire PLL, besides separate implementations of person parts resembling voltage managed oscillators, injection locked frequency dividers and their mixtures, are integrated. moreover, to meet a couple of transceiver topologies at the same time, flexibility is brought within the PLL structure by utilizing new dual-mode ILFDs and switchable VCOs, whereas reusing the low frequency elements on the similar time.

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Extra resources for 60-GHz CMOS Phase-Locked Loops

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The corner frequency between these two transitions is determined by the loop bandwidth, fc. Therefore, as depicted by Fig. 14, the in-band phase noise is dominated by all synthesizer components other than VCO and the out-of-band phase noise follows the VCO phase noise curve. 3. To estimate phase noise performance of the synthesizer in ADS, typical noise contributions of individual components are used. 15 shows the overall synthesizer phase noise as well as contributions from individual components such as VCO, PFD and CP.

The related concept of transfer functions, which describe the s-domain relation between input and output of a linear circuit, is used to analyze the open-loop and closed-loop characteristics of the PLL. A simplified s-domain representation of the synthesizer is shown in Fig. 8. The phase-frequency detector and charge-pump are merged into one block represented by a transfer parameter, KPFD (equal to Icp/2p). The impedance of the second-order loop filter is shown as ZLPF. The VCO conversion gain, KVCO, represents the sensitivity of VCO frequency with tuning voltage in rad/(s  V).

At mm-wave frequencies, this points to setting-up a complete pool of dedicated and specialized equipment, cables, connectors, probes, adapters, waveguides and other such material. In addition to being costly, these require careful and precise usage to achieve successful measurements. A few considerations are enlisted below: l Although there has been development towards high frequency measurement equipment such as vector network analyzers (VNAs), spectrum analyzers (SAs) and signal generators (SGs) in the last decade, they are still in the “catching-up” phase as compared to the rapid development of integrated circuits towards the mm-wave regime.

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