The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Since the capacitor equivalent series resistance (ESR) above 1kHz almost stays constant, dc-link current root-mean-square (RMS) closed form equation is an easy way to evaluate the capacitor losses from the switching harmonic currents (SHCs). But when the ac current contains multiple low order harmonics (LOHs), their impacts on the dc-link has not been systematically studied. In this paper, a straightforward...
In recent years, we have seen the emergence of multi-GS/s medium-to-high-resolution ADCs. Presently, SAR ADCs dominate low-speed applications and time-interleaved SARs are becoming increasingly popular for high-speed ADCs [1,2]. However the SAR architecture faces two key problems in simultaneously achieving multi-GS/s sample rates and high resolution: (1) the fundamental trade-off of comparator noise...
Energy storage (ES) station can be dispatched by the energy management system (EMS) to realize peak load shifting, frequency regulation and other system control. According to the dispatch instructions, total charging and discharging power is allocated among all energy storage units reasonably and optimally. In this paper, a power allocation method is proposed. According to the performance parameters...
This paper presents a digitally calibrated 12bit 12.5-MS/s successive-approximation-register (SAR) analog-to-digital converter (ADC) intended for low-power wireless communication and medical instrumentation. The performance of the proposed prototype is enhanced by two techniques. A power saving strategy is proposed. Also, several foreground calibration methods for SAR ADCs are proposed to reduce the...
A modified low-power switched-capacitor integrator is proposed. It reduces power dissipation without increasing the thermal noise. The proposed integrator is parasitic-insensitive and allows a high linearity. A modified low-distortion self-coupled Delta-Sigma (Δ£) Analog-to-Digital Converter (ADC) is proposed to incorporate this new integrator. Analysis and simulations show that the high linearity...
This paper introduces a set of positive output boost dc-dc converters applying the series voltage-lift technique. Compared with the traditional boost converter, the proposed circuits can perform positive-to-positive dc-dc voltage increasing conversion with higher voltage conversion ratios. They are different from other existing dc-dc step-up converters and are featured with the single-switch operation...
An introduction on the fundamentals of split-capacitors and -inductors is given in this paper. Positive output Luo-converter is taken as the platform by which the integration of split-capacitors/inductors with the voltage lift technique is implemented successfully. The voltage transfer gains of the newly-derived DC-DC topologies are significantly increased along with the number increasing of split-capacitors...
An implantable wireless glucose monitoring SoC with hydrogel-based glucose sensor is proposed in CMOS 0.35 um technology. Owing to the reusable nature of the hydrogel glucose sensor and the wireless readout ability of the circuitry, this SoC is suitable for long-term and continuous monitoring. In-Vitro test shows a resolution of 40 mMole in glucose detection. The total power consumption of the SoC...
New foreground digital calibration methods are proposed for successive approximation register (SAR) analog-to-digital converters (ADCs) to reduce the performance loss due to digital-to-analog converter (DAC) mismatch. A set of calibration coefficients which represent the actual weights of the specified patterns is obtained during foreground calibration, and then used during normal operation to correct...
A new low-power switched-capacitor integrator is proposed for high-resolution ΔΣ ADCs. Compared to the conventional switched-capacitor integrator, it achieves much lower power dissipation for the same noise specifications. To verify the effectiveness of the new integrator, and to compare it with the conventional one, a third-order delta-sigma modulator was simulated. A detailed comparison between...
Modified charge-pump based switched-capacitor integrator is a promising technique to reduce opamp power consumption. In this paper, design methodologies are introduced to incorporate such kind of integrator into a low-distortion delta-sigma modulator. A second-order delta-sigma modulator was designed and simulated to verify the proposed modulator topology.
The state equations of RLCM active network over F(z) are formulated in this paper by analyzing the topologic structure and the cut-set matrix Ql. The computer programming of the state equations is considered and Purslow's conclusion of the state equation is improved. We also give an example to illustrate this.
A new tuning technique is proposed to enable highly linear active Gm-C filter design. The transconductance cells of the Gm-C filter are tuned using switched resistors (SRs) which change the equivalent reference resistance of each cell. In the master tuning circuit, a feedback loop containing a continuous-time comparator is used to force the equivalent resistance of an SR branch to be equal to that...
Radiation-hardened-by-design comparators to mitigate Single-Event-Transients (SETs) are presented. Folded cascode comparators are designed using three types of auto-zeroing techniques: input offset storage (IOS), output offset storage (OOS), and auxiliary offset storage (AOS). The designs are implemented using CMOS 90 nm, and analyzed using Spectre from Cadence. Simulation results show that the transient...
We demonstrate that miniature millimeter-wave (MMW) band-pass filter can be obtained by replacing the traditional eoplanar waveguide structures with the miniature lumped-spiral inductors and metal-insulator-metal (MIM) capacitors. To study the substrate effects on the performances of the spiral inductor and filter, CMOS-compatible backside inductively-coupled-plasma (ICP) deep trench technology was...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.