Voltage rectification: The energy-bottleneck for passive RFID systems (2009)
Feldengut, T., Kolnsberg, S., Kokozinski, R.
Efficient voltage rectification is one the main challenges in passive UHF RFID. When the tag is located several meters from the base station, the amplitude of the UHF signal is critically low. The...
Schmidt, A., Feldengut, T., Kolnsberg, S., Kokozinski, R.
CMOS (Complementary Metal Oxide Semiconductor) analog circuit design for passive RFID transponder systems requires significant decrement of power consumption for almost every system component. The...
A UHF voltage multiplier circuit using a threshold-voltage cancellation technique (2009)
Feldengut, T., Kokozinski, R., Kolnsberg, S.
The operating range of passive UHF transponder systems is largely determined by the tag current consumption and the rectifier efficiency. Reading ranges of several meters have been reported for many...
A passive long-range UHF transponder with integrated temperature sensor (2008)
Feldengut, T., Wang, J., Kolnsberg, S., Kokozinski, R.
Recent development in UHF RFID Tags has been focused on the optimization of the powering and communication range of the reader/tag system. The use of low threshold Shottky-diode rectifiers and the...
A concept for the analysis of cross sensitivities in modern RFID systems (2008)
Wang, J., Feldengut, T., Kolnsberg, S., Kokozinski, R.
In this paper, a concept for the analysis of various cross sensitivities in RFID systems is described. A modern RFID transponder system consists of several analog blocks, a digital section, and...
An analog front end for a passive UHF transponder with temperature sensors (2008)
Feldengut, T., Wang, J., Kolnsberg, S., Kokozinski, R.
We present the analog front-end for a passively powered UHF transponder with integrated temperature sensor that was designed for a 0.35 µm CMOS process with EEPROM, Schottky diodes, and double poly...
Wireless power transmission in sensor transponder systems (2008)
Feldengut, T., Kolnsberg, S., Kokozinski, R.
Wireless power transmission is becoming widespread in different RFID applications such as inventory management, supply chain monitoring, or access control to buildings. These passive transponder...
Technology-caused performance limitation of the common-gate LNA (2007)
Stücke, T., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
In this paper, the performance limitation of common-gate LNAs (CG-LNAs) caused by short channel effects is presented. The analysis is based on equations, which describes the behavior of the MOSFET...
Mehrwert für Applikationen durch Kombination von RFID+S-Systemen und WPANs (2007)
Kolnsberg, S., Coers, A., Feldengut, T., Kokozinski, R., Lörcks, M.
Aktuell ist ein wachsender Bedarf an drahtlosen Kommunikationssystemen mit kurzer Reichweite in Verbindung mit RFID (Radio Frequency IDentification ) Systemen zu beobachten. Verschiedene Transponder...
T. Fedtschenko, R. Kokozinski, S. Kolnsberg
In modernen drahtlosen Systemen sind niedriger Stromverbrauch und das Betreiben bei niedriger Spannung (Low Voltage Operation) von entscheidender Bedeutung. Dabei ist für viele elektronische...
LNA for Low-Power, Low Data Rate PAN Applications (2006)
T. Stücke, N. Christoffers, R. Kokozinski, S. Kolnsberg, B. J. Hosticka
In this paper a common-gate LNA is presented, which is used in a low-power IEEE 802.15.4 receiver with severer requirements on the current consumption. The LNA is designed in a 0.25 μm CMOS...
LNA for low-power, low data rate PAN applications (2006)
Stücke, T., Christoffers, N., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
In this paper a common-gate LNA is presented, which is used in a low-power IEEE 802.15.4 receiver with severer requirements on the current consumption. The LNA is designed in a 0.25 µm CMOS...
Graphical optimization of common-gate LNA (2006)
Stücke, T., Christoffers, N., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
In this paper a novel optimization strategy for common gate LNAs (CG-LNAs) is presented. It based on the modeling of the MOSFET behavior with its intrinsic and extrinsic parasitics in all possible...
Fedtschenko, T., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
In modernen drahtlosen Systemen sind niedriger Stromverbrauch und das Betreiben bei niedriger Spannung (Low Voltage Operation) von entscheidender Bedeutung. Dabei ist für viele elektronische...
The impact of technology parameters on the performance of common-Gate LNAs (2006)
Stücke, T., Christoffers, N., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
In this paper the impact of short channel effects on the performance of common-gate LNAs (CG-LNAs) is presented. It based on the modeling the MOSFET behavior including its intrinsic and extrinsic...
A low power, variable gain common-gate LNA (2006)
Stücke, T., Christoffers, N., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
In this paper a novel variable gain common-gate LNA is presented, which features adaptive gain dependent bias current. The CG-LNA is designed in a 0.25 µm CMOS technology and consumes only 831 µA...
BER optimization for micro power receivers using quick and accurate system simulation (2005)
Stücke, T., Christoffers, N., Kokozinski, R., Kolnsberg, S.
The designer of practical receivers must deal with several problems in the analog as well as in the digital part. All these undesired effects have a large impact on the system performance, which is...
Christoffers, N., Lerch, R.G., Hosticka, B.J., Kolnsberg, S., Kokozinski, R.
Current-mode-logic circuits play an important role in the design of CMOS frequency synthesizers for modern wireless digital communication systems. They provide the building blocks for frequency...
Frequenzgenerator mit einer Phasenregelschleife (2004)
Christoffers, N., Kokozinski, R., Hosticka, B., Kolnsberg, S.
WO2004086210 A UPAB: 20041104 NOVELTY - A camera (24) detects the point of impingement (20,22,56) of electromagnetic radiation beams (42,44,45) on surface (18), from a hand-held radiation unit (12)....
System simulation of IEEE 802.15.4 wireless sensor netwoks (2004)
Stücke, T., Christoffers, N., Kokozinski, R., Kolnsberg, S.
IEEE 802.15.4 and ZigBee are new upcoming standards for low power wireless communications systems. A key feature is a possible a battery durability of several years. They address diverse applications...
Ochsenbrücher, R., Holzapfel, M., Kokozinski, R., Kolnsberg, S., Bögel, G. Vom
For a better treatment and analysis of the eye disease "Glaucoma", a continuous measurement and knowledge of the eye's internal (intraocular) pressure is of particular importance. The transponder...
Design methodology for CMOS frequency-synthesizers for low-power low-cost FSK-transceivers (2004)
Christoffers, N., Kolnsberg, S., Kokozinski, R., Stücke, T., Hosticka, B.J.
CMOS wireless digital transceivers using frequency-shift-keying (FSK) can operate at low power consumption and chip area for several reasons: relaxed linearity requirement of the power amplifier due...
Characterizing wireless transmission channels for passive transponder systems (2004)
Bresch, M., Klein, B., Kokozinski, R., Kolnsberg, S.
This contribution contains a combined characterization of the energy transmission channel and the transponder ASIC of passive transponder systems. This characterization takes the reader antenna as...
Christoffers, N., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
Frequency-hopping-spread-sprectrum wireless digital communication-systems impose stringent requirements on both phase noise and settling time of PLL based frequency synthesizers employed in receivers...
Christoffers, N., Kokozinski, R., Kolnsberg, S., Hosticka, B.J.
PLL-basierte Frequenzgeneratoren erzeugen die in heutigen digitalen drahtlosen Kommunikationssystemen benötigten Trägersignale. Sogenannte Sigma-Delta Fractional-N Frequenzgeneratoren können mit...
The wireless data communication and power transmission between a sensor system and a base station are examined in this Ph.D. thesis. The total system is called a RFIDS-system (Radio Frequency...
A programmable intraocular CMOS pressure sensor system implant (2001)
Stangel, K., Kolnsberg, S., Hammerschmidt, D., Hosticka, B.J., Mokwa, W.
In this paper we present a programmable intraocular pressure sensor system implant integrated on a single CMOS chip. It contains on-chip micromechanical pressure sensor array, a temperature sensor,...
A programmable intraocular CMOS pressure sensor system implant (2000)
Stangel, K., Kolnsberg, S., Hammerschmidt, D., Hosticka, B.J., Mokwa, W.
In this contribution we present a programmable intraocular pressure sensor system implant integrated on a single CMOS chip. It contains on-chip micromechanical pressure sensor array, a temperature...
Micro implantable visual prostheses (2000)
Schwarz, M., Ewe, L., Hijazi, N., Hosticka, B.J., Huppertz, J., Kolnsberg, S., ...
Two micro implantable visual prosthesis systems for blind patients will be described. The first system is a retina implant which is based on an implantable microelectrostimulator applicable for...
CMOS microtransceivers in ophthalmology (2000)
Kolnsberg, S., Stangel, K., Hammerschmidt, D., Schwarz, M., Hosticka, B.J., Ewe, L., ...
Transceivers serve to receive and transmit various transponder data, such as identification or sensory information, using mainly RF links. An interesting category are transponders that extract their...
Single chip CMOS imagers and flexible microelectronic stimulators for a retina implant system (2000)
Schwarz, M., Ewe, L., Hauschild, R., Hosticka, B.J., Huppertz, J., Kolnsberg, S., ...
We are presenting CMOS image sensors and a microelectronic stimulator for realization of a retina implant system that will provide visual sensations using electrostimulation to patients suffering...
Single chip CMOS imagers and flexible microelectronic stimulators for a retina implant system (1999)
Schwarz, M., Hauschild, R., Hosticka, B.J., Huppertz, J., Kneip, T., Kolnsberg, S., ...
In this contribution we present the architecture and realization of microelectronic image sensors and flexible active microstimulators for a retina implant system that will provide visual sensations...
Single chip CMOS image sensors for a retina implant system (1999)
Schwarz, M., Hauschild, R., Hosticka, B.J., Huppertz, J., Kneip, T., Kolnsberg, S., ...
This work describes the architecture and realization of microelectronic components for a retina implant system that will provide visual sensations to patients suffering from photoreceptor...
Microelectronic components for a retina implant system (1999)
Kolnsberg, S., Kneip, T., Lü, X., Huppertz, J., Hauschild, R., Schwarz, M., ...
This work describes the architecture and realisation of microelectronic components for a retina implant system that will provide visual sensations to patients suffering from photoreceptor...
Schwarz, M., Ewe, L., Hauschild, R., Hosticka, B.J., Huppertz, J., Kneip, T., ...
This contribution describes the realization of microelectronic components for a retina implant system that will provide visual sensations to patients with photoreceptor degeneration by applying...