Transforming bit-serial communication circuits into fast parallel VLSI implementations

1988 ◽  
Vol 23 (2) ◽  
pp. 549-557 ◽  
Author(s):  
D.M. Lewis ◽  
B.W. Thomson ◽  
P.I.P. Boulton ◽  
E.S. Lee
Keyword(s):  
Serial Communication ◽  
Communication Circuits ◽  
Bit Serial

scholarly journals 10-GHz wide tuning-range linear voltage-controlled oscillator

2021 ◽  
Author(s):  
Sameh Soliman
Keyword(s):  
High Speed ◽  
Tuning Range ◽  
Serial Communication ◽  
Charge Pump ◽  
Phase Locked Loop ◽  
Center Frequency ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Communication Circuits ◽  
Simulation Results

The current high-growth nature of digital communications demands higher speed serial communication circuits. Present day technologies barely manage to keep up with this demand, and new techniques are required to ensure that serial communication can continnue to expand and grow. The goal of this work is to optimize the performance of an essential building block of serial communication circuits, namely, the phase-locked loop (PLL), so that it can cope with today's high-speed communication. Due to its popularity, the optimization has targeted the charge-pump-based implementqation of the phase-locked loop. This goal is achieved by researching, designing, and evaluating high speed serial communication circuits. Research has involved an in-depth study of the state of the art in high-speed serial communication circuits ; high-speed, controlled oscillators, and CMOS technology. An LC, voltage-controlled oscillator (VCO) is designed in 0.18-micron, mixed-signal, 6-metal-2-poly, CMOS process. A novel tuning technique is employed to tune its output frequency. Simulation results shows that it provides quadrature and differential outputs, operates with 10 GHz center frequency, 600-MHz tuning range centered around its center frequency, and phase noise of -95 dBc/Hz at 1-MHz offset from the fundamental harmonic of its output, and draws 10 ,A of DC current from a single 1.8-V power supply. Also, it exhibits a good linearity throughout its tuning range. The new tuning technique increases the tuning range of the VCO to 6% of its center frequency compared to the 1-to-2% typical value. As its locking performance depends on the characteristic of the employed VCO and to demonstrate the effect of optimizing the tuning range of the VCO, a charge-pump PLL is designed. Simulation results shows that the PLL acquisition range is 300 MHz compared to a maximum value of 100 MHz when a conventional LC VCO is employed. Also, as a measure of its tracking range, the maximum frequency slew rate of its input has improved by 40%.

scholarly journals 10-GHz wide tuning-range linear voltage-controlled oscillator

2021 ◽  
Author(s):  
Sameh Soliman
Keyword(s):  
High Speed ◽  
Tuning Range ◽  
Serial Communication ◽  
Charge Pump ◽  
Phase Locked Loop ◽  
Center Frequency ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Communication Circuits ◽  
Simulation Results

The current high-growth nature of digital communications demands higher speed serial communication circuits. Present day technologies barely manage to keep up with this demand, and new techniques are required to ensure that serial communication can continnue to expand and grow. The goal of this work is to optimize the performance of an essential building block of serial communication circuits, namely, the phase-locked loop (PLL), so that it can cope with today's high-speed communication. Due to its popularity, the optimization has targeted the charge-pump-based implementqation of the phase-locked loop. This goal is achieved by researching, designing, and evaluating high speed serial communication circuits. Research has involved an in-depth study of the state of the art in high-speed serial communication circuits ; high-speed, controlled oscillators, and CMOS technology. An LC, voltage-controlled oscillator (VCO) is designed in 0.18-micron, mixed-signal, 6-metal-2-poly, CMOS process. A novel tuning technique is employed to tune its output frequency. Simulation results shows that it provides quadrature and differential outputs, operates with 10 GHz center frequency, 600-MHz tuning range centered around its center frequency, and phase noise of -95 dBc/Hz at 1-MHz offset from the fundamental harmonic of its output, and draws 10 ,A of DC current from a single 1.8-V power supply. Also, it exhibits a good linearity throughout its tuning range. The new tuning technique increases the tuning range of the VCO to 6% of its center frequency compared to the 1-to-2% typical value. As its locking performance depends on the characteristic of the employed VCO and to demonstrate the effect of optimizing the tuning range of the VCO, a charge-pump PLL is designed. Simulation results shows that the PLL acquisition range is 300 MHz compared to a maximum value of 100 MHz when a conventional LC VCO is employed. Also, as a measure of its tracking range, the maximum frequency slew rate of its input has improved by 40%.

Division and bit-serial multiplication over GF(qm)

1992 ◽  
Vol 139 (3) ◽  
pp. 230 ◽  
Author(s):  
M.A. Hasan ◽  
V.K. Bhargava
Keyword(s):  
Bit Serial

scholarly journals A Survey of Electromagnetic Influence on UAVs from an EHV Power Converter Stations and Possible Countermeasures

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 701
Author(s):  
Yanchu Li ◽  
Qingqing Ding ◽  
Keyue Li ◽  
Stanimir Valtchev ◽  
Shufang Li ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Wide Spectrum ◽  
Electromagnetic Emission ◽  
Power Converter ◽  
Electromagnetic Environment ◽  
Communication Circuits ◽  
Electromagnetic Emissions ◽  
Surrounding Space ◽  
Extra High Voltage ◽  
The Impact

It is inevitable that high-intensity, wide-spectrum electromagnetic emissions are generated by the power electronic equipment of the Extra High Voltage (EHV) power converter station. The surveillance flight of Unmanned Aerial Vehicles (UAVs) is thus, situated in a complex electromagnetic environment. The ubiquitous electromagnetic interference demands higher electromagnetic protection requirements from the UAV construction and operation. This article is related to the UAVs patrol inspections of the power line in the vicinity of the EHV converter station. The article analyzes the electromagnetic interference characteristics of the converter station equipment in the surrounding space and the impact of the electromagnetic emission on the communication circuits of the UAV. The anti-electromagnetic interference countermeasures strive to eliminate or reduce the threats of electromagnetic emissions on the UAV’s hardware and its communication network.

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