90Db, 90MHz, 30m W OTA with the Gain-Enhancement Implemented by One and Two Stage Amplifiers. - Markus Helfenstein; Qiuting Huang; George S. Moschytz (ISCAS, 1995)

Direct Analysis of Multiphase Switched-Current Networks Using Signal-Flow Graphs. - Markus Helfenstein; Arnold Muralt; George S. Moschytz (ISCAS, 1995)

Exact design of multirate switched-current FIR filters with improved phase linearity. - Markus Helfenstein; José E. Franca; George S. Moschytz (ICECS, 1998)

Direct analysis and synthesis of multiphase switched-current networks using signal-flow graphs. - Markus Helfenstein; Arnold Muralt; George S. Moschytz (Int. J. Circuit Theory Appl., 1998)

High-speed interfaces for analog, iterative VLSI decoders. - Markus Helfenstein; Felix Lustenberger; Andrea Loeliger; Felix Tarköy; George S. Moschytz (ISCAS (2), 1999)

An analog VLSI decoding technique for digital codes. - Felix Lustenberger; Markus Helfenstein; Hans-Andrea Loeliger; Felix Tarköy; George S. Moschytz (ISCAS (2), 1999)

Decoding in analog VLSI. - Hans-Andrea Loeliger; Felix Tarköy; Felix Lustenberger; Markus Helfenstein (IEEE Commun. Mag., 1999)

90 dB, 90 MHz, 30 mW CMOS OTA for a high capacitive load. - Markus Helfenstein; Qiuting Huang; George S. Moschytz (Int. J. Circuit Theory Appl., 1999)

Switched-current biquad using differential, double-sampling, forward/backward difference integrators. - Markus Helfenstein; Jari P. Curty; George S. Moschytz (ISCAS, 2000)

Probability propagation and decoding in analog VLSI. - Hans-Andrea Loeliger; Felix Lustenberger; Markus Helfenstein; Felix Tarköy (IEEE Trans. Inf. Theory, 2001)

Combined GMSK and 8PSK modulator for GSM and EDGE. - Peter Bode; Alexander Lampe; Markus Helfenstein (ISCAS (3), 2003)

Improved method for measuring frequency ratios in GSM mobile phones. - Peter Bode; Alexander Lampe; Markus Helfenstein; Michael Gollnick (CICC, 2004)

Error vector magnitude (EVM) measurements for GSM/EDGE applications revised under production conditions. - Markus Helfenstein; Ertan Baykal; Kurt Müller; Alexander Lampe (ISCAS (5), 2005)

Baseband and audio mixed-signal front-end IC for GSM/EDGE applications. - Barbara Baggini; Philipp Basedau; Rolf Becker; Peter Bode; Ralf Burdenski; Farzad Esfahani; Willem H. Groeneweg; Markus Helfenstein; Alexander Lampe; Roland Ryter; Ralph Stephan (IEEE J. Solid State Circuits, 2006)

Correction to "Baseband and Audio Mixed-Signal Front-End IC for GSM/EDGE Applications" [Jun 06 1364-1379]. - Barbara Baggini; Philipp Basedau; Rolf Becker; Peter Bode; Farzad Esfahani; Willem H. Groeneweg; Markus Helfenstein; Alexander Lampe; Roland Ryter; Ralph Stephan (IEEE J. Solid State Circuits, 2010)

A Class-AB/D Audio Power Amplifier for Mobile Applications Integrated Into a 2.5G/3G Baseband Processor. - Willem H. Groeneweg; Bernard Pilloud; Filippo Neri; Guido Notermans; Marco Balucani; Markus Helfenstein (IEEE Trans. Circuits Syst. I Regul. Pap., 2010)

SOI vs. bulk for wireless application. - A. Owzar; Ertan Baykal; P. Felicio; T. Zheng; Ralph Stephan; Markus Helfenstein; Rolf Becker (APCCAS, 2012)

A Frequency-Based Model for Limit Cycle and Spur Predictions in Bang-Bang All Digital PLL. - Dan Liu; Philipp Basedau; Markus Helfenstein; James Wei; Thomas Burger; Yangjian Chen (IEEE Trans. Circuits Syst. I Regul. Pap., 2012)