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Christian Enz

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Related publications (213)

A 2.4-GHz low power polar transmitter for wireless body area network applications

Christian Enz, Vladimir Kopta, Franz Xaver Pengg

A 2.4 GHz low power polar transmitter is proposed in this paper. A dynamic biasing circuit, controlled by a digital envelope signal, is used as a direct digital-to-RF envelope converter. It effectively linearizes the input-output characteristic of the over ...

Springer Verlag2014

Comparison of two optimized readout chains for low light CIS

Christian Enz, Assim Boukhayma

We compare the noise performance of two optimized readout chains that are based on 4T pixels and featuring the same bandwidth of 265kHz (enough to read 1Megapixel with 50frame/s). Both chains contain a 4T pixel, a column amplifier and a single slope analog ...

2014

Modeling the Channel Charge and Potential in Quasi-Ballistic Nanoscale Double-Gate MOSFETs

Christian Enz, Jean-Michel Sallese, Anurag Mangla

In this paper, we present an analytical semiempirical model of the profile of the channel charge and potential in quasi-ballistic double-gate (DG) MOSFETs. The charge model is based on the premise of separating the charge density in the quasi-ballistic cha ...

Ieee-Inst Electrical Electronics Engineers Inc2014

A 533pW NEP 31×31 pixel THz image sensor based on in-pixel demodulation

Christian Enz, Assim Boukhayma

A THz 31×31 pixel, 100 fps image sensor integrated in a 130 nm CMOS process is presented. Taking advantage of the possibility to modulate the active source that lights the scene, a significant improvement in sensitivity and NEP is achieved by shifting the ...

2014

A 0.18 mu m Biosensor Front-End Based on 1/f Noise, Distortion Cancelation and Chopper Stabilization Techniques

Christian Enz, Yüksel Temiz, Carlotta Guiducci, Anna Ferretti

This paper presents a novel sensor front-end circuit that addresses the issues of 1/f noise and distortion in a unique way by using canceling techniques. The proposed front-end is a fully differential transimpedance amplifier (TIA) targeted for current mod ...

Ieee-Inst Electrical Electronics Engineers Inc2013

A 2.4-GHz low power polar transmitter for wireless body area network applications

Christian Enz, Vladimir Kopta, Franz Xaver Pengg

A 2.4-GHz low power polar transmitter architecture is proposed in this paper. A dynamic biasing circuit, controlled by a digital envelope signal, is used to linearize the input-output characteristic of the overdriven class-C power amplifier. A model of the ...

2013

Low-power RF modeling of a 40nm CMOS technology using BSIM6

Christian Enz, Maria-Anna Chalkiadaki

The state-of-the-art scaled down CMOS processes have led to devices with extremely high Ft reaching several hundreds of GHz. This high F t can be traded with power consumption by moving the operating point towards weak inversion with Ft reaching tens of GH ...

2013

Design and modeling of self-aligned nano-imprinted sub-micrometer pentacene-based organic thin-film transistors

Christian Enz, Jean-Michel Sallese, Randoald Müller, Rolando Ferrini, Frédéric Zanella, Nenad Marjanovic

Sub-micrometer channel length (0.5 mu m) organic thin-film transistors (OTFTs) are demonstrated using a process flow combining nano-imprint lithography (NIL) and self-alignment (SA). A dedicated test structure was designed and samples were fabricated on 4- ...

Elsevier2013

Design methodology for ultra low-power analog circuits using next generation BSIM6 MOSFET compact model

Christian Enz, Anurag Mangla, Maria-Anna Chalkiadaki

The recently proposed BSIM6 bulk MOSFET compact model is set to replace the hitherto widely used BSIM3 and BSIM4 models as the de-facto industrial standard. Unlike its predecessors which were threshold voltage based, the BSIM6 core is charge based and thus ...

Elsevier2013

Evaluation of the BSIM6 compact MOSFET model's scalability in 40nm CMOS technology

Christian Enz, Yogesh Singh Chauhan, Anurag Mangla, Maria-Anna Chalkiadaki

IEEE2012

Detailed Analysis of a Phase ADC

Christian Enz

2010

Analysis of Ultralow-Power Asynchronous ADCs

Christian Enz, Aravind Prasad Heragu Singaiyengar

In this paper, analysis of a novel class of A/D converters based on asynchronous delta modulation (DM) is presented and a high level model is realized for the same. Using the high level model, analytical expressions are derived for the calculation of the i ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

A Multiband Concurrent Sampling based RF Front End for Biotelemetry Applications

Christian Enz, Aravind Prasad Heragu Singaiyengar

A sub-sampling based multiband RF front end suitable for medical telemetry applications is presented. Using a single inductor and a single sampling frequency it is shown how to downconvert concurrently Bluetooth LE and MICS band signals to baseband with re ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

WiseNET: An Ultra Low-Power Concept for Wireless Sensor Networks

Christian Enz

2010

A 5.4dBm 42mW 2.4GHz CMOS BAW-based Quasi-Direct Conversion Transmitter

Christian Enz

2010

A Concurrent Quadrature Sub-Sampling Mixer for Multiband Receivers

Christian Enz, Aravind Prasad Heragu Singaiyengar

A quadrature sub-sampling direct conversion mixer capable of sampling two or more bands concurrently using a single sampling frequency is presented. The implementation of the mixer to sample a band in quadrature and downconvert it to baseband is discussed ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

Analysis of a Novel BAW-based Power Amplifier

Christian Enz

A novel MEMS-based co-designed power amplifier is presented. To introduce the analysis and evaluate the impact of realistic on-chip losses, two design approaches are discussed and compared. Then the study of the novel circuit, based on the integration of h ...

2009

A Novel Complex Gm-C IF Sub-Sampling Mixer

Christian Enz, Aravind Prasad Heragu Singaiyengar

In this paper, a novel circuit referred to as complex Gm-C sampler that can be used for sub-sampling IF signals is presented. The circuit employs a conventional cross-coupled Gm-C filter structure with a built-in sampler to combine th ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009

A Narrowband Multi-Channel 2.4 GHz MEMS-Based Transceiver

Christian Enz

This paper presents a new radio architecture targeting RF transceivers for WSN, WBAN, and biomedical applications. The high miniaturization required by such applications is achieved thanks to the combination of high-Q MEMS devices, such as RF BAW re ...

2009

Ultra Low-Power MEMS-based Radio for Wireless Sensor Networks

Christian Enz

2008

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