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Today, the diseases are being treated with less invasive and more sophisticated, technology-oriented methods. The diagnostic tools that were usually used in the hospitals have become available at our homes. Within the heart of this new generation health-care systems, CMOS technology lies with its high capability of integration, low power consumption, and low cost. Within this context, CMOS image sensors...
This paper presents a novel continuous time (CT) - discrete time (DT) current amplifier for electrophysiology. The architecture aims to bring together advantages from both CT and DT approaches, which are high bandwidth and low noise, respectively. The low-noise current amplifier has been implemented in 0.35 µm CMOS technology, showing input-referred noise as low as 4 fA/√Hz. It allows current recording...
In this paper the common-mode noise generation mechanism and its suppression is presented for the hard-switched isolated full-bridge forward topology. Due to the extensive interleaving of primary and secondary windings, such transformers exhibit large inter-winding capacitance which is the well-known cause of large common-mode noise current in the converter. Therefore, the effect of this large coupling...
This paper shows a methodology to reduce electromagnetic radiation in typical CMOS digital systems from chip PDN design point of view. Total PDN property with anti-resonance peak can be strongly affected by on-die PDN property. Then, in order to suppress anti-resonance peak in total system PDN, design of chip PDN is more effective than off-chip damping method. Then, two similar test chips were designed...
A wideband, fully differential, 3-stage class-AB amplifier capable of operation at rates beyond 100 Mbps is described. Common-mode feedback is applied to increase output drive capability and reduce bias-dependent crossover distortion when operating in class-AB from a low supply voltage. Drawing 3.9mA from a nominal VDD of 1.2V in 65nm CMOS, the 0.052mm2 amplifier delivers 1.6V swing across a 50Ω load...
Currently, there is immense incentives-driven research, in the automotive industry to develop Plug-In Electric Vehicles (PIEVs) to reduce the green-house gas emissions and to comply with the Kyoto accord. Isolated High frequency AC-DC converters are a major component to transfer power from utility mains to the traction battery packs which store energy for the EV motors propulsion. The front-end AC/DC...
Power supply noise has been becoming critical in advanced CMOS digital systems, because power supply noise induces false logic operation and instability. Especially, anti-resonance peaks in power distribution network (PDN) due to the chip-package interaction induce the unwanted power supply fluctuation. In this paper, power supply noises and total impedances of power distribution network (PDN) for...
High frequency is one of the main trends of development in power electronics, which will lead to the problems of the electromagnetic interference. The key to improve this phenomenon is EMI filter. In order to increase the power density, a kind of high permittivity material (CCTO) is proposed in this paper. Then, based on this material, we proposed a new connection approach, and applying it to the...
This session highlights advances in amplifier and filter design. The subjects of the papers range from the improvements in filter designs for complex active filters to gain enhancement techniques for actively loaded amplifiers. The session's papers also cover techniques for improving the high frequency distortion performance of amplifiers and a triplet of papers on high performance audio output drivers.
With the progress in VLSI technology increase in circuit density is obvious. In present integrated circuits, electrical power is distributed to the large number of components of the chip over a network of on chip conductors. The systematic arrangement of the power distribution network (PDN) is commonly termed as power grid. The challenge of efficient PDN design escalates to a greater extent especially...
In this Paper, the design of wide frequency range noise shield is presented. The noise suppression effect in the considered noise shield is achieved by increasing flexural rigidity of the planar glass plate, which is carried out by two means: first, by increasing the curvature of the plate, and, second, by attaching the macro fiber composite actuators on the plate surface and connecting them to the...
In this paper, a CMOS neural amplifier based on memcapacitor has been realized. A memcapacitor is a new element based on memristor. A performance comparison between memcapacitor based realization and conventional integrated one has been introduced. The circuits were simulated using 90nm CMOS technology, Vdd = 1.2v, for a total input referred noise of 1.97 µVrms and a total power consumption of 1.28...
A test signal generator to calibrate analog front-ends for biopotential measurements is presented. The integrated signal generator enables detection of the input impedance at the front-end instrumentation amplifier based on current injection and amplitude detection. It can generate picoampere currents while ensuring a high output impedance of 2.9GΩ up to 100Hz. The test signal generator was designed...
This paper presents the design and characterization of a high gain, high-speed differential transimpedance amplifier (TIA) to be used as the front-end interface for optical receiver applications. The TIA is realized in a standard 0.18-µm digital CMOS technology and it dissipates 25.4mW from a single 1.8 V supply. The objective of the design is to maximize the bandwidth. The main contribution of this...
A basic model for excess current noise in amplifiers with switched input is presented. Thermal noise in the input switches causes charge fluctuations in the amplifier input capacitance with a bandwidth much higher than the switching frequency. This wideband charge noise is undersampled by the switching process, leading to excess current noise with a spectral density proportional to temperature, capacitance...
A novel sequential inter-stage correlated double sampling technique has been proposed. This technique provides considerable enhancement in the effective accuracy of a switched-capacitor architecture. Superior accuracy and thermal noise performance is achieved compared to the conventional correlated double sampling technique. The proposed approach provides higher input signal bandwidth by reducing...
On-chip voltage regulator module (VRM) for the reduction of power/ground noise on power distribution network (PDN) and jitter minimization at high-speed output buffer is introduced. The basic topology and optimized operation for on-chip VRM is analyzed. A PDN with on-chip VRM shows reduced power/ground noise through removing additional effects coming from package/PCB PDN. Also, when on-chip VRM is...
In this paper, dual extended Kalman filter is implemented to estimate SoC, internal resistance and capacitance of the super-capacitors applied in hybrid electric vehicles(HEVs) simultaneously based on its first-order equivalent circuit. Both simulation and experiment are carried out to verify the performance of the algorithm. Simulation results demonstrate that the algorithm reduces the estimate errors...
This paper describes a new capacitor sharing technique for pipeline ADCs. It enables power reduction of the first and second MDACs simultaneously. The presented noise and power analysis shows that the proposed method is about 30% more efficient than the conventional one in terms of the first and second MDACs power dissipation. A 10-bit 40MS/s pipeline ADC employing the proposed technique was designed...
A fully-differential capacitive touch sensing method is proposed in which common-mode noise currents are symmetrically subtracted at the differential input of the first stage such that it doesn't contribute to dynamic range reduction in the later stages. And, for better sensitivity, the proposed method could accumulate signal charges in continuous time domain, and does not suffer from aliasing issues...
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