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The temperature sensing of a chip becomes more critical with the increment of the process and circuit complexity. In advanced processes, the heating effect becomes more severe due to the thermal accumulation within the small chip dimension. In order to provide precise and on-chip local thermal sensing, some structures have been demonstrated [1–7]. The paper presents an ultra-low-power, compact and...
A fully on-chip delay generator with a PVT variation self-calibration structure (VSCS) is proposed in this paper. To eliminating the delay variation and ensuring the signal integrity, a proportional to absolute temperature (PTAT) current and a proportional to supply voltage (PTSV) current is adopted in the VSCS. In addition, a bias circuit consisting of positive and negative temperature coefficient...
Thermoelectric generator (TEG) is a sensor that utilizes thermal gradients between cold plate and hot plate of the sensor and convert it into electricity. By having a concise and non-moving structure, the sensor attracts interest in studies to implement an autonomous self sustain system. Power generation of TEG is directly proportional to temperature gradient. Therefore, the device is dismissed when...
We present the comparison of results from the generation and the measurement of direct currents in the pA range, performed with traceable state-of-the-art methods at highest accuracy. The currents were generated with the capacitor charging method, and measured with the first prototype of a novel picoammeter developed at PTB. The results confirm the agreement between both methods and the linearity...
We report the first GaN-based pulse width modulation (PWM) circuit for integrated GaN gate driver. This circuit is composed of a sawtooth generator and a comparator, both of which exhibit stable operation at temperatures up to 250 °C and operate properly at 1 MHz. The PWM circuit is able to generate PWM signals whose duty cycle is effectively modulated over a wide range by a reference voltage. This...
This paper presents the design, simulation, bench measurement and long-term reliability test results of a drift-resistant clock generator. Designed for applications at a stable body temperature with a lifelong operating expectancy, this clock design uses multiple design techniques to minimize the long-term performance degradation and results in a clock circuit with superior frequency stability. This...
Electrostatic generators have been conventionally used to harvest energy from ambient vibrations. The mechanical vibrations alter the gap between the electrodes or the overlapping area of a capacitor without a solid or liquid dielectric to change its capacitance. Despite their high power density, such generators have not been used — and are not intended — to harvest thermal energy. In this paper we...
Class D amplifiers are becoming the most feasible solution for embedded audio application. However, distortions due to the non-linear nature of switching stage are the main drawback for this amplifier topology. This paper discusses the design and implementation of high fidelity audio class D using sliding mode control scheme. This design method proves to be a cost effective solution for industrial...
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