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...
Noise-power trade-off in CMOS-GM-C channel select filters (2006)
Christoffers, N., Fedtschenko, T., Stücke, T.
The channel selection in direct-downconversion receivers can be performed using analog or digital filters or a combination of both. For an appropriate partitioning in an early design phase knowledge...
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...
Phasenregelkreis- (oder PLL-) basierte Frequenzgeneratoren erzeugen die in heutigen momolithischen drahtlosen Transceivern benötigten Referenzschwingungen, mit deren Hilfe Signale im Frequenzbereich...
Weber, R., Jordan, M., Christoffers, N., Hosticka, B.J.
Direct-conversion receivers have attracted increased attention recently as they represent an interesting receiver topology in portable wireless environments, where power, cost, and size are critical...
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...
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...
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...
Weiler, D., Christoffers, N., Boom, T. Van Den, Hosticka, B.J.
In diesem Beitrag wird eine neuartige Fehlererkennungsmethode basierend auf Sigma-Delta-Modulation und Matched-Filterung vorgestellt, die speziell für integrierte Sensorelemente geeignet ist. Dazu...
Accurate CMOS current-mode-filters for high frequencies and low power consumption (2002)
Christoffers, N., Hosticka, B.J., Kokozinski, R.
Analog signal processing in many applications requires low-noise, low-power filters that are little sensitive to element value variations. To meet such requirements the leapfrog approach can be...
Current-mode filters for high frequencies realized in CMOS technologies (2002)
Christoffers, N., Hosticka, B.J., Kokozinski, R.
Analog signal processing in many applications requires low-noise, loe-power filters that are little sensitive to element value variations. To meet such requirements the leapfrog approach can be...
A survey of oscillator phase-noise: Analysis and simulation (2002)
Zhang, Z., Christoffers, N., Hosticka, B.J., Kaiser, T., Kokozinski, R., Lin, J.
Oscillator phase noise is of major concern in the design of transceivers used in modern wirelss digital communication devices. It dcreases the selectivity of the recievers and increases the bandwidth...
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...