An IF Digitizing Receiver for a Combined GPS/GSM Terminal (2007)
K. Boehm, T. Hentschel, T. Mueller, F. Oehler, G. Rohmer
For the purpose of traffic telematics (route guidance, fleet management etc.) one needs terminals on the vehicle for the quasi-simulteanuos reception of cellular phone (GSM) and satellite navigation...
Energy harvesting for mobile communication devices (2007)
Spies, P., Pollak, M., Rohmer, G.
The present paper introduces commercial components, circuit techniques and design considerations for energy harvesting power supplies in mobile communications. Transforming voltage levels is...
SYSTEM ZUR BESTIMMUNG DER POSITION EINES OBJEKTS (2006)
Couronne, S., Koehler, S., Rohmer, G., Grün, T. Von Der, Bretz, I., Gerhaeuser, H.
Spies, P., Rohmer, G., Gerhäuser, H.
WO 2007112868 A1 UPAB: 20080128 NOVELTY - The device has a preparation device designed for producing a decoupling signal in an analog manner and to provide a produced signal, which is a measure for...
Carrera, A., Köhler, S., Rohmer, G.
DE 102006029482 A1 UPAB: 20080118 NOVELTY - The receiver (100) has a band-pass filter device (110) filtering a receiving signal (112), and a mixing device (120) transferring combination signals or...
Signalaufbereiter und Verfahren zum Verarbeiten eines Empfangssignals (2006)
Carrerea, A., Köhler, S., Rohmer, G.
DE 102006029486 A1 UPAB: 20080118 NOVELTY - The processor (100) has a mixer (110) for mixing a received signal (112) with a local oscillator signal (114) whose frequency asymmetrically lies between...
Satellitennavigationsempfaenger (2006)
Urquijo, S., Fiermann, C., Bender, A., Kirchner, M., Rohmer, G.
DE 102006055383 A1 UPAB: 20080620 NOVELTY - The method involves receiving satellite signals for coarse determination of the position and correction data for fine determination of the position via a...
Vorrichtung zur Umwandlung und Speicherung von Energie (2006)
Spies, P., Rohmer, G., Tübke, J., Hebling, C., Boettner, H.
WO 2008064808 A2 UPAB: 20080620 NOVELTY - The device (100) has different energy converters (110, 115) e.g. solar cells, or mechanical energy converters, for converting different forms of energy to...
Einrichtung und Verfahren zum Bestimmen eines Ladezustands einer Batterie (2005)
Spies, P., Overbeck, M., Rohmer, G., Kordas, N., Kappert, H.
WO2004003584 A UPAB: 20040210 NOVELTY - The charge level determination device uses a device (126) for providing a signal representing the operating state of a consumer (118) coupled to the battery...
Ein Modul für das Batterie-Management und -Monitoring (2005)
Lucas, N., Codrea, C., Spies, P., Rohmer, G.
Universelles Entwicklungssystem für Managment & Monitoring aufladbarer Batterien unterschiedlicher Chemie, die Standards Smart Battery Systems (SBS) und System Management Bus (SMBus),...
Entwurf und Charakterisierung schneller GaAs-Abtasthalteglieder hoher Genauigkeit (1995)
A feedforward T/H was developed as part of a 100 MSps / 10 bit successive approximation ADC using a 0.3 mu m AlGaAs-HEMT process. This T/H is able to operate up to a clock frequency of 3 GHz and...
GaAs for ADCs. System needs and device requirements (1994)
Sauerer, J., Oehler, F., Rohmer, G., Schlag, U.
Analog to Digital Converters (ADCs) are the key components at the border between the analog and digital world. They put the most stringent requirements on technology in terms of speed, integration...
An 800 MSps Track and hold using a 0.3 µm AlGaAs-HEMT-technology (1994)
Rohmer, G., Seitzer, D., Nowotny, U., Raynor, B., Schneider, J., Sauerer, J.
A feedforward T/H was developed as part of a 100 MSps / 10 bit successive approximation ADC using a 0.3 µm AlGaAs-HEMT process. This T/H is able to operate up to a clock frequency of 3 GHz and...
Gigasample/second ADCs implemented on GaAs technologies (1993)
Hagelauer, R., Sauerer, J., Oehler, F., Rohmer, G., Seitzer, D.
GaAs Analog-to-Digital Converters (ADCs) published up to now are flash or parallel type converters. The maximum resolution that can be achieved with this architecture is limited to about 5 bit. To...
Galliumarsenid 5 Bit Parallel-AD-Umsetzer mit integriertem Track & Hold für 1 GHz Abtastrate (1993)
Oehler, F., Rohmer, G., Hagelauer, R., Sauerer, J., Seitzer, D.
Um die dynamische Genauigkeit schneller AD-Umsetzer (ADU) zu verbessern, wurde ein 5 Bit Parallel Umsetzer mit integriertem Track & Hold (T & H) entwickelt und mit einem industriellen 1 mu m GaAs...
Differentielles 1 GSps Abtasthalteglied in GaAs-SAGFET-Technologie (1993)
Rohmer, G., Sauerer, J., Seitzer, D., Grave, T., Kellner, W.
In einem 0.5 mu m GaAs E/D SAGFET-Prozeß wurde ein differentielles Abtasthalteglied (A/H) entwickelt. Durch Reduzierung des internen Spannungshubes konnten nicht rückgekoppelte Diodenbrücken als...
System architecture and key components for an 8 bit/1 GHz GaAs MESFET ADC (1992)
Sauerer, J., Hagelauer, R., Oehler, F., Rohmer, G., Schlag, U., Seitzer, D., ...
GaAs Analog to Digital Converters (ADC) published up to now are flash or parallel type converters. The maximum resolution that can be achieved with this approach is limited to 5 bit using today's...
Investigations and measurements of the dynamic performance of high speed ADCs (1992)
Hagelauer, R., Oehler, F., Rohmer, G., Sauerer, J., Seitzer, D., Schmitt, R., ...
The accuracy of ultra-high-speed analog-to-digital converters (ADCs) decreases at higher input frequencies. This is mainly due to timing mismatches, which cause the comparators to sample different...
Investigations and measurements of the dynamic performance of high speed ADCs (1992)
Hagelauer, R., Oehler, F., Rohmer, G., Sauerer, J., Seitzer, D., Schmitt, R., ...
The accuracy of ultra high speed Analog-to-Digital converters (ADCs) decreases at higher input frequencies (beyond 100 MHz) [1, 2, 3]. This is mainly due to timing mismatches, which make the...
Hagelauer, R., Oehler, F., Rohmer, G., Sauerer, J., Seitzer, D.
To enhance the dynamic accuracy of high speed A/D conversion, a 5 bit flash converter with on-chip Track & Hold circuitry (T&H) has been developed. The design is based on TriQuint®s commercial 1 mu...
Hagelauer, R., Oehler, F., Rohmer, G., Sauerer, J., Seitzer, D.
To enhance the dynamic accuracy of high speed A/D conversion, a 5 bit flash converter with on-chip Track & Hold circuitry has been developed. The design is based on TriQuint's commercial 1 mu m GaAs...