Detection of Defective Sensor Elements Using ΣΔ-Modulation ΣΔ and a Matched Filter (2007)
D. Weiler, O. Machul, D. Hammerschmidt, B. J. Hosticka
We present an integrable solution for detection of defective sensor elements using sigma-delta-(ΣΔ)modulation and a matched filter. The sensor element is stimulated using a pseudo random binary...
Leukemia in donor cells after allogeneic hematopoietic stem cell transplant (2002)
Hirsch, B A, Hammerschmidt, D, McGlennen, R C, Nguyen, P L, Verfaillie, C M
The development of leukemia in donor cells after allogeneic hematopoietic stem cell transplant is an extremely rare event. We report here the case of a patient who developed myelodysplastic...
Weiler, D., Hammerschmidt, D., Hosticka, B.J.
This paper presents a novel technique for detection of defective sensor elements. For this purpose the sensor elementis electrically stimulated using a pseudo random binary sequence (PRBS). The...
Multitag transponder systems (2001)
Christoffers, N., Hammerschmidt, D., Hosticka, B., Bögel, G. Vom, Scherer, K.
In the past one of the main problems of multitag passive transponders was the stack problem. The transponders became detuned if arranged in a stack. Hence they could not receive enough power...
Interrogator for stacked passive inductive transponders (2001)
Christoffers, N., Hammerschmidt, D., Bögel, G. Vom, Hosticka, B.J., Niederholz, J.
In logistics and other applications there is a huge demand for passive inductive transponder systems that are for "tagging" various objects. The capability to read multiple transponders quasi...
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 highly flexible evaluation system for telecommunication analog front-ends (2001)
Bresch, M., Hammerschmidt, D., Hosticka, B.J., Kemmerling, M., Klein, B., Kokozinski, R., ...
As technological progress leads to increasing data transmission rates, use of digital transmission is inevitable. However, since analog waveforms are involved in digital transmission, analog...
Low Power DA- und AD-Umsetzer für DSL-Anwendungen (2000)
Teßmann, D., Bresch, M., Hammerschmidt, D., Hesener, M., Hosticka, B.J., Kemna, A., ...
In diesem Beitrag wird die Realisierung von hochauflösenden und schnellen Digital-Analog- (DAC) und Analog-Digital Umsetzern (ADC) für DSL-Anwendungen beschrieben. Die beiden Umsetzer wurden aus...
Ein 2,5V 0,25µm CMOS ADSL Analog-Front-End IC (2000)
Kokozinski, R., Bresch, M., Hammerschmidt, D., Hesener, M., Hosticka, B.J., Kemna, A., ...
Dieser Beitrag beschreibt die Realisierung eines ADSL Analog-Front-Ends. Der Baustein, der in einer 0,25µm CMOS Technologie gefertigt wurde, integriert sämtliche analogen Funktionalitäten für...
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...
A low-voltage low-power 0.25 µm CMOS ADSL analog front-end IC (2000)
Kokozinski, R., Bresch, M., Hammerschmidt, D., Hesener, M., Hosticka, B.J., Kemna, A., ...
A 0.12 µm 2.5V CMOS analog front-end IC for an ADSL system is presented. The IC contains all analog functions including gain-controlled transmit and receive amplifiers, highly linear continuous-time...
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...
Remote CMOS pressure sensor chip with wireless power and data transmission (2000)
Boom, T. Van Den, Teßmann, D., Lerch, R.G., VomBögel, G., Hammerschmidt, D., Amelung, J., ...
We present a single chip wireless pressure sensor system containing on-chip capacitive pressure arrays, temperature sensor, voltage reference, SC 10bit cyclic ADC, controller, EEPROM and ASK...
A single-chip smart pressure sensor family with 2 dimensional calibration (2000)
Weiler, D., Machul, O., Hammerschmidt, D., Amelung, J., Hosticka, B.J.
We present a single-chip CMOS solution for a pressure transducer reaching an 1% accuracy over the temperature range between -40°C and 125°C after calibration that delivers a ratiometric analog...
Nonlinear function generation using oversampled Sigma-Delta-modulators (2000)
Machul, O., Hammerschmidt, D., Weiler, D., Hosticka, B.J.
In this paper we present a technique for nonlinear function generation which uses a novel sparse look-up table approach. This novel approach can be derived from the simple look-up table concept and...
Detection of defective sensor elements using sigma-delta-modulation and a matched filter (2000)
Weiler, D., Machul, O., Hammerschmidt, D., Hosticka, B.J.
We present an integrable solution for detection of defective sensor elements using sigma-delta-modulation and a matched filter. The sensor element is stimulated using a pseudo random binary sequence...
1% genaue Absolutdrucksensorfamilie mit zweidimensionaler Kalibration (2000)
Weiler, D., Machul, O., Hammerschmidt, D., Amelung, J., Hosticka, B.J., Mokwa, W.
In diesem Beitrag wird eine monolithisch integrierte Absolutdrucksensorfamilie mit "on-chip" oberflächenmikromechanischem kapazitivem Drucksensorelement, Sensorauslese, Linearisierung und...
Sensor systems: interface between environment and application (1999)
The rapidly growing market for sensor systems on the one hand boosts the development of new sensor principles and technologies, on the other hand the increasing fields of use require an integration...
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...
Boom, T. Van Den, Stevanovic, N., Driesen, J., Hammerschmidt, D., Hosticka, B.J.
The design techniques for analog-to-digital converters (ADCs) require careful optimization in order to minimize the amount of hardware required and enable economical monolithic integration. A basic...
Boom, T. Van Den, Stevanovic, N., Driesen, J., Hammerschmidt, D., Hosticka, B.J.
The design techniques for analog-to-digital converters (ADCs) require careful optimization in order to minimize the amount of hardware required and enable economical monolithic integration. A basic...
An absolute air pressure smart sensor family with 2 dimensional calibration (1999)
Weiler, D., Machul, O., Amelung, J., Hammerschmidt, D., Hosticka, B.J.
We present a monolithic pressure transducer family with on-chip pressure sensor, readout, linearization, and temperature compensation, reaching an 1% accuracy after calibration. Temperature...
Sigma-Delta-Modulator 3. Ordnung mit gechoppten Differenzpfad-SC-Integratoren (1998)
Hammerschmidt, D., Kokozinski, R., Wieland, F., Andersch, M., Dathe, L., ...
Für eine hochgenaue Streckenmessung wurde ein Sigma-Delta-Modulator 3. Ordnung realisiert, der bei einer Basisbandfrequenz von 10kHz und einer Überabtastrate (OSR) von 125 ein...
Effiziente Kalibration für resistive Sensorsysteme (1998)
Kemna, A., Machul, O., Hammerschmidt, D., Hosticka, B.J.
Heutzutage entfällt - abhängig von den Genauigkeitsanforderungen - ein erheblicher Teil der Herstellungskosten präziser Sensorsysteme auf die Kalibrationskosten. Die Entwicklung einer effizienten...
1 Bit Sigma-Delta Modulator mit nichtlinearer Quantisierung für My-law Kodierung (1998)
Weiler, D., Nielsen, P.A., Hammerschmidt, D., Machul, O., Hosticka, B.J.
Es wird ein Sigma-Delta-Modulator erster Ordnung mit "My-law" Kodierung für die dynamische Kompression von Sprachsignalen vorgestellt. Die "My-law"-Kennlinie wird durch Rückkopplung 15 exponentiell...
Machul, O., Hammerschmidt, D., Brockherde, W., Hosticka, B.J., Obermeier, E., Krause, P.
A smart pressure transducer with a piezo resistive sensor microbridge, digitally controlled readout electronics, and a nonlinear temperature compensation based on spline functions, is integrated on a...
Single bit sigma-delta modulator with nonlinear quantization for mu m-law coding (1997)
Weiler, D., Nielsen, P.A., Hammerschmidt, D., Machul, O., Hosticka, B.J.
This paper presents a 1st order sigma-delta-modulator with µ-law coding for dynamic compression of audio signals. The nonlinearity is located in the feedback loop of the modulator and does not...
Hosticka, B.J., Brockherde, W., Hammerschmidt, D.
Silicon sensor systems are based on capability of silicon to serve as a basic material for monolithic cointegration of sensors and electronics. Implementation of this cointegration, its advantages...
Machul, O., Hammerschmidt, D., Brockherde, W., Hosticka, B.J.
Der Gesamtpreis präziser Sensorsysteme wird heutzutage neben den sinkenden Herstellungskosten massiv von den Kosten für das Testen und der zumeist zeitintensiven Kalibration mitbestimmt. Die Test-...
Readout electronics with calibration and on-line test for resistive sensor bridges (1996)
Machul, O., Hammerschmidt, D., Brockherde, W., Hosticka, B.J.
In this paper a digitally programmable readout electronics for resistive sensor bridges is presented together with an efficient method for calibration based on the principle of piecewise linear...
Kombinierte RAM/PROM Speicherzellen in kalibrierbaren Sensorschaltungen (1996)
Boom, T. Van Den, Hammerschmidt, D., Machul, O., Brockherde, W., Hosticka, B.J.
Für den Einsatz in Sensorsystemen werden Speicherzellen vorgestellt, die zunächst während der Ermittlung der benötigten Einstellungen als RAM betrieben werden und nach Abschluß der Kalibration...
Integrierte Gleichrichterschaltung: Gleichrichterschaltung (A1) (1996)
Hammerschmidt, D., Hosticka, B.
A rectifier circuit has two input terminals for an AC voltage, two output terminals for a DC voltage, a series regulating transistor connected between an input terminal and an output terminal and a...
Analog Low-Voltage-CMOS-Schaltungen (1996)
Kokozinski, R., Brockherde, W., Hammerschmidt, D., Hosticka, B.J.
Silicon microsystems for mechatronic applications (1995)
Brockherde, W., Hammerschmidt, D., Hosticka, B.J.
While modern microelectronic fabrication processes allow monolithic integration of millions and millions of electronic devices on tiny silicon chips and thus form a technological base for...
Low-voltage CMOS analog circuits (1995)
Hosticka, B.J., Brockherde, W., Hammerschmidt, D., Kokozinski, R.
This contribution addresses the issue of low-voltage analog circuit design in CMOS technology. In particular, three areas of design will be discussed: switched-capacitor circuits, continuous-time...
Ein CMOS Interface zur Energie- und Datenübertragung für kontaktlose Chipkarten (1995)
Hammerschmidt, D., Volkwein, B., Brockherde, W., Scherer, K., Hosticka, B.J.
Zum Aufbau kontaktloser Chipkarten mit Standard-Mikroprozessoren und planaren Spulen wird ein CMOS Interface IC vorgestellt, in dessen Empfänger-Schaltung die Gleichrichtung und die...
Antialiasing and smoothing filters for sampled data signals using distributed RC-elements (1995)
Hammerschmidt, D., Machul, O., Brockherde, W., Hosticka, B.J.
An 3rd order active smoothing or antialiasing lowpass filter based on distributed RC-elements is presented together with a procedure for optimum design of this type of filter. When compared to...
An 1.5 V cyclic A/D converter CMOS technology (1995)
Hammerschmidt, D., Brockherde, W., Hosticka, B.J., Kokozinski, R.
A low-cost 1.5 V A/D converter has been realized in standard CMOS technology. It combines low-voltage switched-capacitor technique with a differential signal path. The conversion is programmable and...
Temperaturkompensation von Sensorsystemen durch CMOS-Schaltungen (1994)
Hammerschmidt, D., Sprotte, A., Schnatz, F.V., Brockherde, W., Hosticka, B.J., ...
Es werden am Beispiel unterschiedlicher Sensorsysteme (Druck-, Magnetfeld-, Gas-Sensoren) verschiedene, an die Sensoren angepaßte Vorgehensweisen zur Temperaturkompensation erläutert. Die...
Hammerschmidt, D., Schnatz, F.V., Brockherde, W., Hosticka, B.J., Schlichting, V., Obermeier, E.
Es wird ein monolithisch integriertes CMOS-Drucksensorsystem vorgestellt. Die mit dem piezoresistiven Sensor integrierten Schaltungen ermöglichen neben der lastfreien Auslese der Brücke die...
Schlichting, V., Lossy, R., Graf, N., Obermeier, E., Hammerschmidt, D., Schnatz, F.V., ...
In diesem Beitrag wird ein integrierter piezoresistiver Silizium-Drucksensor vorgestellt, bei dem alle für die Kalibrierung relevanten Parameter (Offsetspannung, Ausgangssignal,...
Analoge CMOS-Schaltungen für niedrige Versorgungsspannungen. (1994)
Brockherde, W., Hammerschmidt, D., Hosticka, B.J., Schnatz, F.V.
Analoge Schaltungen, die in Standard-CMOS-Technologien mit linearen Kondensatoren gefertigt werden, können ohne weiteres auch bei sehr niedrigen Versorgungsspannungen betrieben werden. Die im...
Digital programmable pressure sensor with on-chip CMOS signal processing and data storage (1993)
Schlichting, V., Hammerschmidt, D., Hosticka, B.J., Obermeier, E., Pollak-Diener, G., Schnatz, F.V.
Monolithic sensors can greatly benefit from on-chip electronics since modern signal processsing has a potential to contribute significantly to improving overall sensor performance. This is important...
A CMOS piezoresistive pressure sensor with on-chip programming and calibration (1993)
Brockherde, W., Hammerschmidt, D., Hosticka, B.J., Obermeier, E., Schnatz, F.V.
A pressure sensor with on-chip programmable readout and calibration electronics is presented. It features a 30 bit programming capability of sensitivity, offset, stabilized bias, as well as first and...
A CMOS bandgap reference for low voltage applications (1993)
Hammerschmidt, D., Nielsen, P.A., Schnatz, F.V., Brockherde, W., Hosticka, B.J.
A bandgap reference circuit which operates at supply voltages down to 1.2V is presented. It offers a reference voltage of 82mV and a reference current of 2myA with a temperature dependence of less...
Craddock, P R, Hammerschmidt, D, White, J G, Dalmosso, A P, Jacob, H S
Activated plasma complement will induce biphasic aggregation of human granulocytes dectable by standard nephelometric techniques. The responsible active component was suggested to be C5a by molecular...
Craddock, P R, Hammerschmidt, D, White, J G, Dalmosso, A P, Jacob, H S
Activated plasma complement will induce biphasic aggregation of human granulocytes dectable by standard nephelometric techniques. The responsible active component was suggested to be C5a by molecular...