IEEE Transactions on Circuits & Systems II Express Briefs · 2018 · 18 citations · 14 references
EngineeringBioengineeringElectrical EngineeringAnalog ElectronicsMicroelectronicsSemiconductor DevicesAnalog Integrated CircuitsCmos Circuit DesignImpedance SpectroscopyIntegrated Circuit DesignIntegrated Circuit DevicesMixed-signal Integrated Circuit DesignBandwidthCmos Analog Circuit DesignCmos Analog Integrated CircuitsElectrical ImpedanceError ReductionPhase CompensationPhase DelaySilicon
In a conventional sinewave current driver for electrical impedance spectroscopy, as the frequency is increased the input/output phase delay of the current driver increases due to limited bandwidth. The required maximum phase delays of <; 4° mean that operation is limited to about 1/12 of the driver bandwidth. A new phase compensation scheme is presented to reduce the phase delay at higher frequencies and can extend the useful operating frequency range of a current driver. The system is capable of reducing the phase error due to the current driver by an appreciable level so that it can operate much nearer the pole frequency of the driver. An integrated circuit was fabricated in a 0.35-μm CMOS process technology, which provides a phase error reduction from 22° to 3° at 3 MHz. Its core occupies a silicon area of 1.2 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . It operates from a ±2.5 V power supply and can deliver output currents up to 1.8 mAp-p at 3 MHz.
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Analysis and Design of Analog Integrated Circuits
W.R. Betts · Electronics and Power · 1978 · 3.8K citations
The flipped voltage follower: a useful cell for low-voltage low-power circuit design
R.G. Carvajal, J. Ramı́rez-Angulo, Antonio J. López‐Martín et al. · IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications · 2005 · 692 citations
Engineering, Computer Engineering, Electrical Engineering +17