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 for analog computers T2 - Kleinheubach Conference, 27. - 29. September, 2022, Miltenberg, Germany Y1 - 2022 UR - https://ieeexplore.ieee.org/document/9954508 SN - 978-3-948571-07-8 SP - 1 EP - 4 PB - IEEE ER - TY - THES A1 - Killat, Dirk T1 - Störgrößeneliminierende Sensorsignalverarbeitung Y1 - 1997 SN - 3-18-326509-5 PB - VDI-Verlag CY - Düsseldorf ER - TY - GEN A1 - Ulmann, Bernd A1 - Köppel, Sven A1 - Killat, Dirk T1 - Open Hardware Analog Computer for Education – Design and Application T2 - 2021 Kleinheubach Conference, 28-30 September 2021 Y1 - 2021 SN - 978-3-948571-04-7 SN - 978-1-6654-0711-3 U6 - https://doi.org/10.23919/IEEECONF54431.2021.9598447 ER - TY - CHAP A1 - Killat, Dirk A1 - Xu, Weiwei A1 - Li, Ye A1 - Hong, Zhiliang A1 - Schleifer, Horst T1 - A single-inductor multiple-bipolar-output (SIMBO) converter with fully-adaptive feedback matrix and improved light-load ripple T2 - 2011 proceedings of the ESSCIRC (ESSCIRC 2011), Helsinki, Finland, 12 - 16 September 2011 Y1 - 2011 SN - 978-1-457-70703-2 SP - 435 EP - 438 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP A1 - Mezger, Florian T1 - Digitale Regelung von Schaltwandlern - Ein Überblick KW - Kleinheubacher Tagung 2011 des URSI Landesausschuss, Miltenberg Y1 - 2011 ER - TY - GEN A1 - Pitonak, Pavol A1 - Killat, Dirk T1 - Time-continuous Delta-Sigma-Modulator with switchable resistors in 65 nm CMOS Technology T2 - 3rd URSI Atlantic and Asia Pacific Radio Science Meeting, 30 May - 04 June 2022, Gran Canaria, Spain Y1 - 2022 SN - 978-9-4639-6-8058 SN - 978-1-6654-9986-6 U6 - https://doi.org/10.23919/AT-AP-RASC54737.2022.9814345 PB - IEEE Xplore ER - TY - THES A1 - Heuer, Henning T1 - Auf Tantal-Silizium basierende Diffusionsbarrieren zur Verkapselung funktionaler Bauelemente KW - Tantal KW - Solarzelle KW - Verkapselung KW - Diffusionsbarrieren KW - Flexible Solarzellen KW - Tantal-Silizium KW - Dünne Schichten Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-10 ER - TY - JOUR A1 - Killat, Dirk A1 - Schleifer, Horst T1 - Modeling of integrator leakage in a continuous time delta-sigma-modulator using Matlab Y1 - 2008 ER - TY - PAT A1 - Killat, Dirk T1 - Converter with inductor and digital controlled timing Y1 - 2008 ER - TY - GEN A1 - Bramburger, Stefan A1 - Pitonak, Pavol A1 - Killat, Dirk T1 - A unary coded current steering DAC with sequential stepping of the thermometer coded register in 1 and 2 LSB steps T2 - 41st International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO), 21-25 May 2018, Opatija, Croatia N2 - This paper presents an 8-bit current steering DAC that uses unary current sources and a thermometer coded register. The thermometer coded register is controlled by sequentially stepping one or two steps up or down dependent on the control input. The enhanced step size mitigates the slew-rate limitation if the DAC is used in a delta-encoded tracking ADC. The sequential switching of thermometer coded DAC register does not require a binary to thermometer decoder and reduces complexity of error compensation. Y1 - 2018 SN - 978-953-233-095-3 U6 - https://doi.org/10.23919/MIPRO.2018.8400017 SP - 89 EP - 92 PB - IEEE CY - Piscataway ER - TY - PAT A1 - Hong, Zhiliang A1 - Killat, Dirk A1 - Xu, Weiwei T1 - Switching converter and method for controlling a switching converter Y1 - 2010 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 - Ulmann, Bernd A1 - Killat, Dirk T1 - Solving systems of linear equations on analog computers T2 - 2019 Kleinheubach Conference, September 23-25, 2019, Miltenberg, Germany N2 - Solving systems of linear equations is a central task not only in artificial intelligence. This article outlines a technique making it possible to employ analog computers to the solution of such equations. Using iterative techniques it is even possible to setup a hybrid computer, i. e. a combination of a classic digital and an analog computer, where the analog portion can be used as a co-processor. If the solutions obtained by pure analog computing are not of the required accuracy, it is possible to use these as initial vectors for a classic iterative algorithm running on the digital computer to further enhance the precision of the solution obtained. Y1 - 2019 UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8890096 SN - 978-3-948571-00-9 ER - TY - GEN A1 - Killat, Dirk A1 - Langenheinrich, Werner A. T1 - Signal processing for magnetic micro torque sensors T2 - Sensors and Actuators A: Physical N2 - A novel type of signal processing for a magnetic micro torque sensor is described and simulated. The sensor principles are based on a soft magnetic core shaped as a yoke, two current-carrying coils, a soft magnetic amorphous ribbon with strong magnetostrictive properties that is fixed on a shaft, and at least two magnetic flux-density sensors. The sensor determines directly the change of permeability of the amorphous ribbon on the shaft. Nevertheless, the variation of the air gap between the sensor and the rotating shaft affects the measurement principle. Therefore, the magnetic flux density is measured at two positions, one at the face of the soft magnetic core and the other beside the face of the core in the area of the stray flux. The evaluation of these two flux densities yields the distance between the sensor and the shaft as well as the permeability of the amorphous ribbon. The problem arising with this practice is the determination of the sensitivity of the flux-density sensors. As the current-carrying coils are alternately operated in a common and a push-pull mode, the unknown sensitivities of the flux-density sensors do not affect the evaluation of the permeability of the amorphous ribbon on the shaft. Y1 - 1995 U6 - https://doi.org/10.1016/0924-4247(94)00913-3 SN - 0924-4247 VL - 46 IS - 1-3 SP - 315 EP - 319 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 - Pitonak, Pavol A1 - Killat, Dirk T1 - Dynamic delta sigma ADC with variable clock on 65 nm CMOS T2 - 2023 Kleinheubach Conference, September 26-28, 2023, Miltenberg, Germany Y1 - 2023 UR - https://ieeexplore.ieee.org/document/10296769 SN - 978-3-948571-08-5 SP - 1 EP - 3 PB - IEEE CY - Piscataway ER - TY - GEN A1 - Venkatesha, Shishira S. A1 - Killat, Dirk T1 - A fully differential 3-stage CMOS op-amp for high-speed sampling applications T2 - 2023 Kleinheubach Conference, September 26 - 28, 2023, Miltenberg, Germany Y1 - 2023 UR - https://ieeexplore.ieee.org/document/10296724 SN - 978-3-948571-08-5 SP - 1 EP - 4 PB - IEEE CY - Piscataway 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 - TY - GEN A1 - Killat, Dirk A1 - Köppel, Sven A1 - Ulmann, Bernd A1 - Wetzel, Lucas T1 - Solving Partial Differential Equations with Monte Carlo / Random Walk on an Analog-Digital Hybrid Computer T2 - Tagungsband MikroSystemTechnik Kongress 2023, Dresden, 23. - 25. Oktober 2023 Y1 - 2023 SN - 978-3-8007-6203-3 SN - 978-3-8007-6204-0 SP - 556 EP - 564 PB - VDE Verlag CY - Berlin ER -