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 information fee instant purposes at millimeter wave frequencies ordinarily and 60 GHz particularly have won a lot cognizance lately. even if, demanding situations regarding circuit, structure and measurements in the course of mm-wave CMOS IC layout need to be conquer ahead of they could turn into doable for mass market.

60-GHz CMOS Phase-Locked Loops targeting phase-locked loops for 60 GHz instant transceivers elaborates those demanding situations and proposes recommendations for them. The method point layout to circuit point implementation of the entire PLL, in addition to separate implementations of person parts comparable to voltage managed oscillators, injection locked frequency dividers and their combos, are incorporated. additionally, to meet a few 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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Additional info for 60-GHz CMOS Phase-Locked Loops

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As the ring does not form a closed loop around the inductor, it does not affect the magnetic field of the latter significantly. In this work, the latter two methods are widely employed to achieve isolation from substrate losses of the inductors employed in VCO and prescaler circuits. a b c d Fig. 4 Cross Talk Shielding and Grounding The small dimensions of mm-wave circuits together with the requirement of short interconnects can potentially lead to electromagnetic coupling and cross-talk between different parts of the circuit.

11. The LPF block is custom-made based on the second order loop filter equations. The divider is used to step the division ratio and VCO output is demodulated using the FM_Demod block to obtain the settling time results. 58 GHz Fnom = fcenter Rout = 50 Ohm DIV DivideByN DIV3 Fnomin = fcenter N = if (time < 500ns) then 131 else 136 end if Fig. 11 ADS basic simulation environment acquire open-loop gain and phase response of the PLL. The PFD and charge pump are merged into one block and characterized by relevant parameters like Icp, deadzone time and timing jitter.

The loop’s AC response to extract stability information like phase margin, dynamic behavior to obtain settling time, and noise performance are all possible using this tool. A basic simulation environment is depicted in Fig. 11. The LPF block is custom-made based on the second order loop filter equations. The divider is used to step the division ratio and VCO output is demodulated using the FM_Demod block to obtain the settling time results. 58 GHz Fnom = fcenter Rout = 50 Ohm DIV DivideByN DIV3 Fnomin = fcenter N = if (time < 500ns) then 131 else 136 end if Fig.

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