TY - GEN A1 - Killat, Dirk T1 - A One-Chip Solution for Electronic Ballasts T2 - Power Electronics Technology Y1 - 2004 VL - 30 IS - 3 SP - 22 EP - 27 ER - TY - GEN A1 - Killat, Dirk A1 - Xu, Weiwei A1 - Zhu, Xiaoting A1 - Hong, Zhiliang T1 - A single-inductor dual-output switching converter with average current mode control T2 - Journal of Semiconductors Y1 - 2009 SN - 1674-4926 VL - 39 IS - 9 SP - 095012-1 EP - 095012-6 ER - TY - GEN A1 - Killat, Dirk A1 - Xu, Weiwei A1 - Li, Ye A1 - Gong, Xiaohan A1 - Hong, Zhiliang T1 - A Dual-Mode Single-Inductor Dual-Output Switching Converter with Small Ripple T2 - IEEE transactions on power electronics Y1 - 2010 SN - 0885-8993 VL - 25 IS - 3 SP - 614 EP - 623 ER - TY - GEN A1 - Pashmineh, Sara A1 - Killat, Dirk T1 - High-voltage circuits for power management on 65 nm CMOS T2 - Advances in Radio Science N2 - This paper presents two high-voltage circuits used in power management, a switching driver for buck converter with optimized on-resistance and a low dropout (LDO) voltage regulator with 2-stacked pMOS pass devices. The circuit design is based on stacked MOSFETs, thus the circuits are technology independent. Y1 - 2015 UR - http://www.adv-radio-sci.net/13/109/2015/ars-13-109-2015.html U6 - https://doi.org/10.5194/ars-13-109-2015 IS - 13 SP - 109 EP - 120 ER - TY - GEN A1 - Killat, Dirk A1 - Schmitz, Richard T1 - A reflected-light receiver with 2 nA sensitivity using CDS and separate low-pass filtering of the input signal at each clock-phase T2 - Sensors and Actuators N2 - The design of an integrated receiver for reflected light using correlated double sampling (CDS) is presented. CDS has the disadvantage that input signals of high frequencies are folded back to the base band caused by sampling the continuous input signal. However, the circuit presented here uses a new method to limit the bandwidth of the CDS input signal. Two filter-capacitors, one for each clock phase, are periodically connected to the input of the CDS circuit. As the input signal is low-pass filtered by the ohmic output resistance of the optical sensor in conjuction with the filter-capacitors, aliasing can be avoided. Measurements of a test circuit demonstrate the effectiveness of this principle. Y1 - 1996 U6 - https://doi.org/10.1016/0924-4247(96)80145-2 SN - 0924-4247 VL - 52 IS - 1-3 SP - 175 EP - 178 ER - TY - GEN A1 - Bramburger, Stefan A1 - Zinke, Benny A1 - Killat, Dirk T1 - Interpolation algorithm for asynchronous ADC-data T2 - Advances in radio science N2 - This paper presents a modified interpolation algo- rithm for signals with variable data rate from asynchronous ADCs. The Adaptive weights Conjugate gradient Toeplitz matrix (ACT) algorithm is extended to operate with a contin- uous data stream. An additional preprocessing of data with constant and linear sections and a weighted overlap of step- by-step into spectral domain transformed signals improve the reconstruction of the asycnhronous ADC signal. The interpo- lation method can be used if asynchronous ADC data is fed into synchronous digital signal processing. Y1 - 2017 UR - https://www.adv-radio-sci.net/15/163/2017/ars-15-163-2017.pdf U6 - https://doi.org/10.5194/ars-15-163-2017 SN - 1684-9973 VL - 15 SP - 163 EP - 168 ER - TY - GEN A1 - Mendonca, Lucas Sangoi A1 - Martins, Leandro Tomé A1 - Radecker, Matthias A1 - Bisogno, Fábio Ecke A1 - Killat, Dirk T1 - Normalized Modeling of Piezoelectric Energy Harvester Based on Equivalence Transformation and Unit-Less Parameters T2 - Journal of Microelectromechanical Systems N2 - Micro-electromechanical systems are ubiquitous in several energy harvesting solutions and can be used in applications such as bio-implantable devices and wireless micro-sensors. Piezoelectricity is an interesting key to perform the interface between environmental extracted energy and the power delivered to the load due to the use of mechanical vibration and resonance features. However, it is necessary for a detailed analysis in order to obtain an accurate understanding of the system. In this regard, some works deal with the normalization procedures to analyze the piezoelectric component behavior based on the mechanical resonance frequency. In order to enhance the system modeling, the electromechanical resonance frequency must also be analyzed. This paper deals with an approach to model the piezoelectric component that allows analyzing several unitless parameters that are critical to improve the performance of the system. In addition, a state-space model for the piezo-harvester based on the Class-E resonant rectifier is presented. Some experimental results are shown to validate the theoretical approach. [2019-0082]. Y1 - 2019 UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8745680 U6 - https://doi.org/10.1109/JMEMS.2019.2921649 SN - 1941-0158 SN - 1057-7157 VL - 28 IS - 4 SP - 666 EP - 677 ER - TY - GEN A1 - Bramburger, Stefan A1 - Killat, Dirk T1 - 10-bit tracking ADC with a multi-bit quantizer, variable step size and segmented current-steering DAC T2 - Advances in Radio Science N2 - This paper presents a 10-bit tracking ADC using a multi-bit quantiser and a segmented current-steering DAC. The quantiser allows a dynamical adjustment of the step size dependent on the input signal waveform. This mitigates the limited slew rate of delta encoded ADCs. Energy consumption induced by 1 LSB ripple is removed by the quantiser. The segmented current-steering DAC allows simple control, good monotonicity and improved transient response when compared to previous design as well as potential power reduction. Y1 - 2019 UR - https://ars.copernicus.org/articles/17/161/2019/ U6 - https://doi.org/10.5194/ars-17-161-2019 SN - 1684-9973 SN - 1684-9965 VL - Vol. 17 SP - 161 EP - 167 ER - TY - GEN A1 - Köppel, Sven A1 - Ulmann, Bernd A1 - Heimann, Lars A1 - Killat, Dirk T1 - Using analog computers in today's largest computational challenges T2 - Advances in Radio Science Y1 - 2021 U6 - https://doi.org/10.5194/ars-19-105-2021 SN - 1684-9973 VL - 19 SP - 105 EP - 116 ER - TY - GEN A1 - Killat, Dirk A1 - Ulmann, Bernd A1 - Köppel, Sven T1 - Hybrid integrators with predictive overload estimation for analog computers and continuous-time ΔΣ modulators T2 - Advances in Radio Science Y1 - 2023 U6 - https://doi.org/10.5194/ars-21-89-2023 SN - 1684-9973 VL - 21 SP - 89 EP - 100 ER -