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This paper presents a self-testing technique for split-capacitor-array SAR ADC. In the proposed mutual characterization methodology, the capacitor array is reconfigured so that one sub-array assists the bit weight extraction of the other. Taking advantage of the split-capacitor-array architecture, mutual characterization incurs much less area overhead than previous works. From obtained bit weights,...
Capacitor mismatch is the linearity limiter of charge redistribution SAR ADCs. This paper aims at detecting and removing the mismatch induced missing-decision levels (MDLs), i.e., large positive DNLs; these errors lead to information loss that cannot be recovered by external calibration. A switched-capacitor based approach is proposed to avoid DC currents and reduce design overhead; the hardware modification...
For two-pattern at-speed scan testing, the excessive power supply noise at the launch cycle may cause the circuit under test to malfunction, leading to yield loss. This paper proposes a new weight assignment scheme for logic switching activity; it enhances the IR-drop assessment capability of the existing weighted switching activity (WSA) model. By including the power grid network structure information,...
The demand for qualified engineering professionals in the modern world is far exceeding their supply by higher educational institutions and this gap continues to grow. It is important to attract new students into the area of engineering in order to redress the situation. To address the problem, the universities and institutions of tertiary technical education have to embark on energetic outreach programs...
This paper presents the system analysis and circuit characteristics of an interleaved soft switching DC-DC converter. One auxiliary switch and one fast recovery diode are connected between the half-bridge leg and the middle point of split capacitors to generate three different voltage levels on the primary side of transformer. The zero voltage switching (ZVS) is achieved at the transition interval...
Micromechanical resonant displacement gain stages have been demonstrated that employ directionally engineered stiffnesses in resonant structures to effect displacement amplification from a driven input axis to an output axis. Specifically, the introduction of slots along the output axis of a 53-MHz wine-glass mode disk resonator structure realizes a single gain stage with a measured input-to-output...
A soft switching interleaved converter with series-connected transformers is presented in this paper. Based on the operation behavior in the proposed converter, each transformer of the series-connected transformers can be operated as an inductor or a transformer. Therefore no output filter inductor is needed in the converter. Asymmetrical pulse-width modulation (APWM) scheme is adopted to control...
This paper presents a load adaptive voltage regulator that achieves high efficiency extended to light and heavy load regions. The presented method is named as adaptive field effect transistor modulation (AFM) since multiple field effect transistors (FETs) with different characteristics (different sizes) are applied in parallel such that the number of driven FETs and their respective gate driving voltage...
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