@misc{KoeppelUlmannHeimannetal., author = {K{\"o}ppel, Sven and Ulmann, Bernd and Heimann, Lars and Killat, Dirk}, title = {Using analog computers in today's largest computational challenges}, series = {Advances in Radio Science}, volume = {19}, journal = {Advances in Radio Science}, issn = {1684-9973}, doi = {10.5194/ars-19-105-2021}, pages = {105 -- 116}, language = {en} } @misc{KillatUlmannKoeppel, author = {Killat, Dirk and Ulmann, Bernd and K{\"o}ppel, Sven}, title = {Hybrid integrators for analog computers}, series = {Kleinheubach Conference, 27. - 29. September, 2022, Miltenberg, Germany}, journal = {Kleinheubach Conference, 27. - 29. September, 2022, Miltenberg, Germany}, publisher = {IEEE}, isbn = {978-3-948571-07-8}, pages = {1 -- 4}, language = {en} } @phdthesis{Killat, author = {Killat, Dirk}, title = {St{\"o}rgr{\"o}ßeneliminierende Sensorsignalverarbeitung}, publisher = {VDI-Verlag}, address = {D{\"u}sseldorf}, isbn = {3-18-326509-5}, pages = {XV, 136}, language = {de} } @misc{UlmannKoeppelKillat, author = {Ulmann, Bernd and K{\"o}ppel, Sven and Killat, Dirk}, title = {Open Hardware Analog Computer for Education - Design and Application}, series = {2021 Kleinheubach Conference, 28-30 September 2021}, journal = {2021 Kleinheubach Conference, 28-30 September 2021}, organization = {IEEE}, isbn = {978-3-948571-04-7}, doi = {10.23919/IEEECONF54431.2021.9598447}, pages = {2}, language = {en} } @inproceedings{KillatXuLietal., author = {Killat, Dirk and Xu, Weiwei and Li, Ye and Hong, Zhiliang and Schleifer, Horst}, title = {A single-inductor multiple-bipolar-output (SIMBO) converter with fully-adaptive feedback matrix and improved light-load ripple}, series = {2011 proceedings of the ESSCIRC (ESSCIRC 2011), Helsinki, Finland, 12 - 16 September 2011}, booktitle = {2011 proceedings of the ESSCIRC (ESSCIRC 2011), Helsinki, Finland, 12 - 16 September 2011}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-457-70703-2}, pages = {435 -- 438}, language = {en} } @inproceedings{Mezger, author = {Mezger, Florian}, title = {Digitale Regelung von Schaltwandlern - Ein {\"U}berblick}, language = {de} } @misc{PitonakKillat, author = {Pitonak, Pavol and Killat, Dirk}, title = {Time-continuous Delta-Sigma-Modulator with switchable resistors in 65 nm CMOS Technology}, series = {3rd URSI Atlantic and Asia Pacific Radio Science Meeting, 30 May - 04 June 2022, Gran Canaria, Spain}, journal = {3rd URSI Atlantic and Asia Pacific Radio Science Meeting, 30 May - 04 June 2022, Gran Canaria, Spain}, publisher = {IEEE Xplore}, isbn = {978-9-4639-6-8058}, doi = {10.23919/AT-AP-RASC54737.2022.9814345}, pages = {4}, language = {en} } @phdthesis{Heuer, author = {Heuer, Henning}, title = {Auf Tantal-Silizium basierende Diffusionsbarrieren zur Verkapselung funktionaler Bauelemente}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus-10}, language = {de} } @article{KillatSchleifer, author = {Killat, Dirk and Schleifer, Horst}, title = {Modeling of integrator leakage in a continuous time delta-sigma-modulator using Matlab}, language = {en} } @misc{Killat, author = {Killat, Dirk}, title = {Converter with inductor and digital controlled timing}, language = {en} } @misc{BramburgerPitonakKillat, author = {Bramburger, Stefan and Pitonak, Pavol and Killat, Dirk}, title = {A unary coded current steering DAC with sequential stepping of the thermometer coded register in 1 and 2 LSB steps}, series = {41st International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO), 21-25 May 2018, Opatija, Croatia}, journal = {41st International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO), 21-25 May 2018, Opatija, Croatia}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-953-233-095-3}, doi = {10.23919/MIPRO.2018.8400017}, pages = {89 -- 92}, abstract = {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.}, language = {en} } @misc{HongKillatXu, author = {Hong, Zhiliang and Killat, Dirk and Xu, Weiwei}, title = {Switching converter and method for controlling a switching converter}, language = {en} } @misc{MendoncaMartinsRadeckeretal., author = {Mendonca, Lucas Sangoi and Martins, Leandro Tom{\´e} and Radecker, Matthias and Bisogno, F{\´a}bio Ecke and Killat, Dirk}, title = {Normalized Modeling of Piezoelectric Energy Harvester Based on Equivalence Transformation and Unit-Less Parameters}, series = {Journal of Microelectromechanical Systems}, volume = {28}, journal = {Journal of Microelectromechanical Systems}, number = {4}, issn = {1941-0158}, doi = {10.1109/JMEMS.2019.2921649}, pages = {666 -- 677}, abstract = {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].}, language = {en} } @misc{UlmannKillat, author = {Ulmann, Bernd and Killat, Dirk}, title = {Solving systems of linear equations on analog computers}, series = {2019 Kleinheubach Conference, September 23-25, 2019, Miltenberg, Germany}, journal = {2019 Kleinheubach Conference, September 23-25, 2019, Miltenberg, Germany}, isbn = {978-3-948571-00-9}, pages = {4}, abstract = {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.}, language = {en} } @misc{KillatLangenheinrich, author = {Killat, Dirk and Langenheinrich, Werner A.}, title = {Signal processing for magnetic micro torque sensors}, series = {Sensors and Actuators A: Physical}, volume = {46}, journal = {Sensors and Actuators A: Physical}, number = {1-3}, issn = {0924-4247}, doi = {10.1016/0924-4247(94)00913-3}, pages = {315 -- 319}, abstract = {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.}, language = {en} } @misc{KillatSchmitz, author = {Killat, Dirk and Schmitz, Richard}, title = {A reflected-light receiver with 2 nA sensitivity using CDS and separate low-pass filtering of the input signal at each clock-phase}, series = {Sensors and Actuators}, volume = {52}, journal = {Sensors and Actuators}, number = {1-3}, issn = {0924-4247}, doi = {10.1016/0924-4247(96)80145-2}, pages = {175 -- 178}, abstract = {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.}, language = {en} } @misc{PitonakKillat, author = {Pitonak, Pavol and Killat, Dirk}, title = {Dynamic delta sigma ADC with variable clock on 65 nm CMOS}, series = {2023 Kleinheubach Conference, September 26-28, 2023, Miltenberg, Germany}, journal = {2023 Kleinheubach Conference, September 26-28, 2023, Miltenberg, Germany}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-3-948571-08-5}, pages = {1 -- 3}, language = {en} } @misc{VenkateshaKillat, author = {Venkatesha, Shishira S. and Killat, Dirk}, title = {A fully differential 3-stage CMOS op-amp for high-speed sampling applications}, series = {2023 Kleinheubach Conference, September 26 - 28, 2023, Miltenberg, Germany}, journal = {2023 Kleinheubach Conference, September 26 - 28, 2023, Miltenberg, Germany}, publisher = {IEEE}, address = {Piscataway}, isbn = {978-3-948571-08-5}, pages = {1 -- 4}, language = {en} } @misc{KillatUlmannKoeppel, author = {Killat, Dirk and Ulmann, Bernd and K{\"o}ppel, Sven}, title = {Hybrid integrators with predictive overload estimation for analog computers and continuous-time ΔΣ modulators}, series = {Advances in Radio Science}, volume = {21}, journal = {Advances in Radio Science}, issn = {1684-9973}, doi = {10.5194/ars-21-89-2023}, pages = {89 -- 100}, language = {en} } @misc{KillatKoeppelUlmannetal., author = {Killat, Dirk and K{\"o}ppel, Sven and Ulmann, Bernd and Wetzel, Lucas}, title = {Solving Partial Differential Equations with Monte Carlo / Random Walk on an Analog-Digital Hybrid Computer}, series = {Tagungsband MikroSystemTechnik Kongress 2023, Dresden, 23. - 25. Oktober 2023}, journal = {Tagungsband MikroSystemTechnik Kongress 2023, Dresden, 23. - 25. Oktober 2023}, publisher = {VDE Verlag}, address = {Berlin}, isbn = {978-3-8007-6203-3}, pages = {556 -- 564}, language = {en} }