A CMOS Ultra-wideband LNA Utilizing a Frequency-Controlled Feedback Technique

Soliman, Yasser; MacEachern, L.; Roy, Langis

doi:10.1109/icu.2005.1570044

Cited by 13 publications

(4 citation statements)

References 12 publications

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“…The consistency between the measured and calculated ones verifies our noise analysis in Section III. Since the input matching bandwidth in this study (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) is wider than the specification (3.1-10.6 GHz), the NF frequency response can be flattened by reducing the capacitance term [see (22)] at the expense of the input matching bandwidth.…”

Section: Measurement Results and Discussionmentioning

confidence: 99%

“…Note that will be very close to the origin if is very large. From the coefficients of the second-order and constant terms of (12), we can obtain the following equations: Equation (13) implies that if a very large is added to the open loop amplifier, both and will be created simultaneously around the origin since and . This is consistent with the calculated root-locus diagram shown in Fig.…”

Section: B Uwb Gain Flattening Techniquementioning

confidence: 99%

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3–10-GHz Ultra-Wideband Low-Noise Amplifier Utilizing Miller Effect and Inductive Shunt–Shunt Feedback Technique

Lin

Chen

Wang

et al. 2007

IEEE Trans. Microwave Theory Techn.

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In this paper, we demonstrate an SiGe HBT ultra-wideband (UWB) low-noise amplifier (LNA), achieved by a newly proposed methodology, which takes advantage of the Miller effect for UWB input impedance matching and the inductive shunt-shunt feedback technique for bandwidth extension by pole-zero cancellation. The SiGe UWB LNA dissipates 25.8-mW power and achieves 11 below 10 dB for frequencies from 3 to 14 GHz (except for a small range from 10 to 11 GHz, which is below 9 dB), flat 21 of 24.6 1.5 dB for frequencies from 3 to 11.6 GHz, noise figure of 2.5 and 5.8 dB at 3 and 10 GHz, respectively, and good phase linearity property (group-delay variation is only 28 ps across the entire band). The measured 1-dB compression point ( 1 dB ) and input third-order intermodulation point are 25.5 and 17 dBm, respectively, at 5.4 GHz.

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Section: Measurement Results and Discussionmentioning

confidence: 99%

Section: B Uwb Gain Flattening Techniquementioning

confidence: 99%

3–10-GHz Ultra-Wideband Low-Noise Amplifier Utilizing Miller Effect and Inductive Shunt–Shunt Feedback Technique

Lin

Chen

Wang

et al. 2007

IEEE Trans. Microwave Theory Techn.

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“…We decided to substitute the behavioral architecture of one of the fundamental blocks with a layout back-annotated Spice-level netlist including parasitics. We used the low-noise amplifier presented in [33], fabricated in a 0.18-m CMOS technology, for which the post-layout netlist was made available. Its main features are the use of a frequency-controlled feedback, a high linearity ( 2.48 dBm, 1-dB compression point), an average noise figure of 4.4 dB, 8 dB and a bandwidth that extends over the entire UWB spectrum.…”

Section: Phase III Resultsmentioning

confidence: 99%

A VHDL-AMS Simulation Environment for an UWB Impulse Radio Transceiver

Casu

Crepaldi

Graziano

2008

IEEE Trans. Circuits Syst. I

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Ultra-wide-band (UWB) communication based on the impulse radio paradigm is becoming increasingly popular. According to the IEEE 802.15 WPAN Low Rate Alternative PHY Task Group 4a, UWB will play a major role in localization applications, due to the high time resolution of UWB signals which allow accurate indirect measurements of distance between transceivers. Key for the successful implementation of UWB transceivers is the level of integration that will be reached, for which a simulation environment that helps take appropriate design decisions is crucial. Owing to this motivation, in this paper we propose a multiresolution UWB simulation environment based on the VHDL-AMS hardware description language, along with a proper methodology which helps tackle the complexity of designing a mixed-signal UWB system-on-chip. We applied the methodology and used the simulation environment for the specification and design of an UWB transceiver based on the energy detection principle. As a by-product, simulation results show the effectiveness of UWB in the so-called ranging application, that is the accurate evaluation of the distance between a couple of transceivers using the two-way-ranging method. Index Terms-Mixed-signal integrated circuits, ultra-wide-band (UWB) communications, VHDL-AMS. I. INTRODUCTION A CCORDING to the definition of the Federal Communications Commission (FCC) an ultra-wide-band (UWB) signal is characterized by a bandwidth of minimum 500 MHz or by a fractional bandwidth of at least 20%, regardless of the type of modulation or system of transmission [1]. In 2002, FCC released the spectrum between 3.1 and 10.6 GHz for unlicensed use with UWB signals, provided that severe average and peak power constraints are respected. The broad UWB definition and the large free spectrum led to many different proposals of more or less conventional modulation strategies [like wide-band orthogonal frequency-division multiplexing (OFDM) and code-division multiple access (CDMA)], which are envisaged for applications like wireless personal area networks (WPANs), (see, for example, the former work of the IEEE 802.15 WPAN High Rate Alternative PHY Task Group 3a [2] and of the current WiMedia Alliance [3]). However, UWB is more commonly referred to as a "baseband" or "impulse-based" communication technology, because one of the possibility to exploit such a large bandwidth is to directly send fast rise-time and short duration carrier-free pulses to a wide-band antenna. This is certainly not new because the origins root back to the

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“…Previous techniques for designing wideband LNAs utilize analytical expressions for the LNA design parameters, such as device width and passive component values, that optimize certain figures of merit [1,[4][5][6][7][8][9][10]. Due to the simplifying assumptions necessary to create the explicit expressions, these techniques may not account for the inductor or device parasitics and typically lack the flexibility to constrain component values to ensure that the circuit can be fully integrated on-chip.…”

Section: Introductionmentioning

confidence: 99%

Expression of Concern: Hierarchical Optimization Methodology for Wideband Low Noise Amplifiers

Nieuwoudt

Ragheb

Massoud

2007

2007 Asia and South Pacific Design Automation Conference

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In this paper, we present a systematic synthesis methodology for fully integrated wideband low noise amplifiers that simultaneously optimizes impedance matching, noise figure, and other performance parameters. Leveraging an accurate analytical model, we hierarchically couple global optimization techniques with local convex optimization methods to efficiently locate optimal wideband LNA circuits. The results indicate that the methodology yields significant improvement in key LNA design constraints over existing methodologies while achieving up to one order of magnitude speedup in computational performance.

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A CMOS Ultra-wideband LNA Utilizing a Frequency-Controlled Feedback Technique

Cited by 13 publications

References 12 publications

3–10-GHz Ultra-Wideband Low-Noise Amplifier Utilizing Miller Effect and Inductive Shunt–Shunt Feedback Technique

3–10-GHz Ultra-Wideband Low-Noise Amplifier Utilizing Miller Effect and Inductive Shunt–Shunt Feedback Technique

A VHDL-AMS Simulation Environment for an UWB Impulse Radio Transceiver

Expression of Concern: Hierarchical Optimization Methodology for Wideband Low Noise Amplifiers

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