@misc{BramburgerKillat, author = {Bramburger, Stefan and Killat, Dirk}, title = {10-bit tracking ADC with a multi-bit quantizer, variable step size and segmented current-steering DAC}, series = {Advances in Radio Science}, volume = {Vol. 17}, journal = {Advances in Radio Science}, issn = {1684-9973}, doi = {10.5194/ars-17-161-2019}, pages = {161 -- 167}, abstract = {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.}, language = {en} } @misc{KillatPitonak, author = {Killat, Dirk and Pitonak, Pavol}, title = {Verfahren und Schaltungsanordnung zur reduzierung eines Einflusses eines Taktjitters in einem Delta-Sigma-Modulator}, language = {de} } @misc{KillatPitonak, author = {Killat, Dirk and Pitonak, Pavol}, title = {Analog-Digital-Umsetzer und Verfahren zur Umwandlung eines urspr{\"u}nglich analogen Signals in ein konvertiertes Digitalsignal}, language = {de} } @misc{KillatRombach, author = {Killat, Dirk and Rombach, Pirmin}, title = {Vorrichtung und Verfahren zur ber{\"u}hrungslosen Messung von Drehmomenten an Wellen}, 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} } @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{VenkateshaPitonakKillat, author = {Venkatesha, Shishira S. and Pitonak, Pavol and Killat, Dirk}, title = {Active and continuous compensation of clock jitter in CT Delta-Sigma ADCs}, 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 Explore}, isbn = {978-9-4639-6-8058}, doi = {10.23919/AT-AP-RASC54737.2022.9814404}, pages = {4}, language = {en} } @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} } @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} } @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{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{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} } @misc{VijayakumarPitonakKillat, author = {Vijayakumar, Shreyas Subramanya and Pitonak, Pavol and Killat, Dirk}, title = {A Function Generator on TSMC 65nm CMOS for Analog Computing}, series = {2024 Kleinheubach Conference, September 24-26, 2024, Miltenberg, Germany}, journal = {2024 Kleinheubach Conference, September 24-26, 2024, Miltenberg, Germany}, publisher = {IEEE}, doi = {10.23919/IEEECONF64570.2024.10739166}, pages = {4}, abstract = {This paper presents a detailed analysis of a function generator that utilizes a fully differential analog input processed through a current subtractor, offset comparators, thermometercoded current steering X-iDAC, programmable ROM, 11-to-32 decoder and Y-iDAC. This configuration enables precise and customizable waveform generation, crucial for various applications in analog computing and signal processing.}, language = {en} } @misc{VenkateshaKillat, author = {Venkatesha, Shishira S and Killat, Dirk}, title = {Design of a fully differential track-and-hold amplifier}, series = {2025 Kleinheubach Conference}, journal = {2025 Kleinheubach Conference}, publisher = {IEEE}, address = {Piscataway, NJ}, doi = {10.23919/IEEECONF67516.2025.11225213}, pages = {1 -- 4}, abstract = {This paper presents a fully differential track-and-hold amplifier (THA) architecture for high-speed applications. The proposed design employs a distinctive switching arrangement that converts non-linear errors into a constant offset and provides an initialization sub-phase before tracking. The circuit utilizes two capacitors in the signal path to enable gain flexibility, providing an accurate output during hold mode. The THA was implemented in 65-nm CMOS technology with a 1.2 V supply voltage. The results of the simulation after layout demonstrate a droop rate of 2.5mV/μS, a hold-mode settling time of 2ns for a 1pF hold capacitor.}, language = {en} } @misc{KillatPitonakUlmann, author = {Killat, Dirk and Pitonak, Pavol and Ulmann, Bernd}, title = {High-precision CMOS multiplier with wide dynamic range}, series = {2025 32nd IEEE International Conference on Electronics, Circuits and Systems (ICECS)}, journal = {2025 32nd IEEE International Conference on Electronics, Circuits and Systems (ICECS)}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {979-8-3315-9585-2}, issn = {2995-0589}, doi = {10.1109/ICECS66544.2025.11270705}, pages = {1 -- 4}, abstract = {Multipliers are an important general-purpose analog function. Precision multipliers are still mostly based on bipolar transistors. In CMOS, small-signal based multipliers are often used as mixers. There are many approaches in CMOS that use the squaring characteristics of the MOSFET, but they do not come close to the accuracy and linearity of bipolar multipliers. This paper presents a new principle and verifies it on a four-quadrant multiplier on a test chip in 65 nm CMOS technology. A new type of input predistortion is used to drive the cascaded differential stage. With a supply voltage of 1.2 V and differential input signals of up to ±700 mV, a linearity of better than 0.5 \% of the measurement range is achieved over a wide temperature and frequency range.}, language = {en} }