@unpublished{VolkGorbeyGruenwaldetal.,
  author    = {Volk, Tobias and Gorbey, Stefan and Gr{\"u}nwald, Waldemar and Bhattacharyya, Mayukh and Reindl, Leonhard Michael and Lemmer, Bj{\"o}rn and Stieglitz, Thomas and Jansen, Dirk},
  title     = {RFID Technology for Continuous Monitoring of Physiological Signals in Small Animals},
  series = {IEEE Transactions on Biomedical Engineering},
  volume    = {62},
  number    = {2/2015},
  issn      = {1558-2531},
  pages     = {618 -- 628},
  language  = {en}
}
@unpublished{VolkGorbeyGruenwaldetal.,
  author    = {Volk, Tobias and Gorbey, Stefan and Gr{\"u}nwald, Waldemar and Bhattacharyya, Mayukh and Reindl, Leonhard Michael and Lemmer, Bj{\"o}rn and Jansen, Dirk},
  title     = {Semi-passive powered biotelemetry for small animals},
  series = {Sensors and Actuators. A: Physical},
  volume    = {221},
  number    = {2015},
  issn      = {0924-4247},
  doi       = {10.1016/j.sna.2014.10.021},
  pages     = {95 -- 103},
  language  = {en}
}
@article{BhattacharyyaGruenwaldJansenetal.,
  author    = {Bhattacharyya, Mayukh and Gr{\"u}nwald, Waldemar and Jansen, Dirk and Reindl, Leonhard Michael and Aghassi-Hagmann, Jasmin},
  title     = {An Ultra-Low-Power RFID/NFC Frontend IC Using 0.18 μm CMOS Technology for Passive Tag Applications},
  series = {Sensors},
  volume    = {18},
  number    = {5},
  publisher = {MDPI AG},
  address   = {Basel},
  issn      = {1424-8220},
  doi       = {10.3390/s18051452},
  pages     = {1452},
  abstract  = {Battery-less passive sensor tags based on RFID or NFC technology have achieved much popularity in recent times. Passive tags are widely used for various applications like inventory control or in biotelemetry. In this paper, we present a new RFID/NFC frontend IC (integrated circuit) for 13.56 MHz passive tag applications. The design of the frontend IC is compatible with the standard ISO 15693/NFC 5. The paper discusses the analog design part in details with a brief overview of the digital interface and some of the critical measured parameters. A novel approach is adopted for the demodulator design, to demodulate the 10\% ASK (amplitude shift keying) signal. The demodulator circuit consists of a comparator designed with a preset offset voltage. The comparator circuit design is discussed in detail. The power consumption of the bandgap reference circuit is used as the load for the envelope detection of the ASK modulated signal. The sub-threshold operation and low-supply-voltage are used extensively in the analog design—to keep the power consumption low. The IC was fabricated using 0.18 μm CMOS technology in a die area of 1.5 mm × 1.5 mm and an effective area of 0.7 mm2. The minimum supply voltage desired is 1.2 V, for which the total power consumption is 107 μW. The analog part of the design consumes only 36 μW, which is low in comparison to other contemporary passive tags ICs. Eventually, a passive tag is developed using the frontend IC, a microcontroller, a temperature and a pressure sensor. A smart NFC device is used to readout the sensor data from the tag employing an Android-based application software. The measurement results demonstrate the full passive operational capability. The IC is suitable for low-power and low-cost industrial or biomedical battery-less sensor applications. A figure-of-merit (FOM) is proposed in this paper which is taken as a reference for comparison with other related state-of-the-art researches.},
  language  = {en}
}
@unpublished{VolkBhattacharyyaGruenwaldetal.,
  author    = {Volk, Tobias and Bhattacharyya, Mayukh and Gr{\"u}nwald, Waldemar and Reindl, Leonhard Michael and Jansen, Dirk},
  title     = {Formal Description of Inductive Air Interfaces Using Th{\´e}venin's Theorem and Numerical Analysis},
  series = {IEEE Transactions on Magnetics},
  volume    = {50},
  number    = {6},
  organization    = {IEEE},
  issn      = {0018-9464},
  doi       = {10.1109/TMAG.2014.2300042},
  pages     = {1 -- 9},
  abstract  = {With the development of new integrated circuits to interface radio frequency identification protocols, inductive air interfaces have become more and more important. Near field communication is not only able to communicate, but also possible to transfer power wirelessly and to build up passive devices for logistical and medical applications. In this way, the power management on the transponder becomes more and more relevant. A designer has to optimize power consumption as well as energy harvesting from the magnetic field. This paper discusses a model with simple equations to improve transponder antenna matching. Furthermore, a new numerical analysis technique is presented to calculate the coupling factors, inductions, and magnetic fields of multiantenna systems.},
  language  = {en}
}
@article{JansenBhattacharyyaHummeletal.,
  author    = {Jansen, Dirk and Bhattacharyya, Mayukh and Hummel, Corinna and Riske, Alexander and Volk, Tobias and Gr{\"u}nwald, Waldemar},
  title     = {Projekte aus dem Bereich der Medizintechnik},
  series = {Beitr{\"a}ge aus Forschung \& Technik},
  volume    = {2012},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:ofb1-opus-1467},
  pages     = {25 -- 27},
  abstract  = {Das Institut f{\"u}r Angewandte Forschung arbeitet seit Jahren an RFID-Applikationen unter Verwendung des Protokolls nach ISO15693-Standard. Wir entwickeln in dem Zusammenhang sowohl Frontendelektronik als auch Reader, die es erm{\"o}glichen, diese Tags auszulesen. Projekte der vergangenen Jahre waren sowohl SEAGsens als auch medizintechnische Anwendungen unterschiedlichster Art.},
  language  = {de}
}
@article{JansenBhattacharyyaGruenwaldetal.,
  author    = {Jansen, Dirk and Bhattacharyya, Mayukh and Gr{\"u}nwald, Waldemar and Kreker, Andreas and Twum-Boafo, Addo and Volk, Tobias},
  title     = {Projekte aus dem Bereich der Medizintechnik},
  volume    = {2011},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:ofb1-opus-1037},
  pages     = {26 -- 28},
  abstract  = {Projekte der Hochschule Offenburg aus dem Bereich der Medizintechnik: - Elektronische Pille (ePille®) - MamoCheck - Trans{\"o}sophagealer Stimulator - TeleMed},
  language  = {de}
}
@article{BhattacharyyaGruenwaldJansenetal.,
  author    = {Bhattacharyya, Mayukh and Gr{\"u}nwald, Waldemar and Jansen, Dirk and Reindl, Leonhard Michael and Aghassi-Hagmann, Jasmin},
  title     = {Design of a Programmable Passive SoC for Biomedical Applications Using RFID ISO 15693/NFC5 Interface},
  series = {Journal of Low Power Electronics and Applications},
  volume    = {8},
  number    = {1},
  publisher = {MDPI AG},
  address   = {Basel},
  issn      = {2079-9268},
  doi       = {10.3390/jlpea8010003},
  url       = {http://nbn-resolving.de/urn:nbn:de:swb:90-803462},
  pages     = {3},
  abstract  = {Low power, low cost inductively powered passive biotelemetry system involving fully customized RFID/NFC interface base SoC has gained popularity in the last decades. However, most of the SoCs developed are application specific and lacks either on-chip computational or sensor readout capability. In this paper, we present design details of a programmable passive SoC in compliance with ISO 15693/NFC5 standard for biomedical applications. The integrated system consists of a 32-bit microcontroller, a sensor readout circuit, a 12-bit SAR type ADC, 16 kB RAM, 16 kB ROM and other digital peripherals. The design is implemented in a 0.18 µm CMOS technology and used a die area of 1.52 mm × 3.24 mm. The simulated maximum power consumption of the analog block is 592 µW. The number of external components required by the SoC is limited to an external memory device, sensors, antenna and some passive components. The external memory device contains the application specific firmware. Based on the application, the firmware can be modified accordingly. The SoC design is suitable for medical implants to measure physiological parameters like temperature, pressure or ECG. As an application example, the authors have proposed a bioimplant to measure arterial blood pressure for patients suffering from Peripheral Artery Disease (PAD).},
  language  = {en}
}
@inproceedings{BhattacharyyaDuschJansenetal.,
  author    = {Bhattacharyya, Mayukh and Dusch, Benjamin and Jansen, Dirk and Mackensen, Elke},
  title     = {Design and Verification of a Mixed-Signal SoC for Biomedical Applications},
  series = {Tagungsband zum Workshop der Multiprojekt-Chip-Gruppe Baden-W{\"u}rttemberg, Ulm, Juli 2015},
  volume    = {54},
  address   = {Ulm},
  organization    = {Hochschule Ulm},
  issn      = {1868-9221},
  pages     = {38 -- 43},
  abstract  = {In this paper an RFID/NFC (ISO 15693 standard) based inductively powered passive SoC (system on chip) for biomedical applications is presented. A brief overview of the system design, layout techniques and verification method is dis-cussed here. The SoC includes an integrated 32 bit microcontroller, sensor interface circuit, analog to digital converter, integrated RAM, ROM and some other peripherals required for the complete passive operation. The entire chip is realized in CMOS 0.18 μm technology with a chip area of 1.52mm x 3.24 mm.},
  language  = {en}
}