Wideband LNA Using a Negative gm Cell for Improvement of Linearity and Noise Figure

Yoon, Jun-Sik; Seo, Heesong; Choi, Injun; Kim, B.

doi:10.1163/156939310791036412

Cited by 21 publications

(15 citation statements)

References 21 publications

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“…As in any amplifier [8][9][10], mixer [11][12][13][14][15][16][17], or active antenna with mixing capabilities [18], noise behavior [11,12] and IF signal distortion [13,18] are key factors that must be rigorously analyzed and minimized. In this work, it will be shown that the figures of merit which are traditionally used to analyze the linearity of conventional mixers cannot be directly applied to an autonomous circuit like the HSOM, because of the influence of the input RF signal power on the parameters of the self-oscillating signal.…”

Section: Introductionmentioning

confidence: 99%

New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

Fernández

Hoeye²,

Vázquez³

et al. 2012

PIER

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Abstract-In this work, the linearity of a high gain Harmonic Self Oscillating Mixer (HSOM) is analyzed. In order to obtain high conversion gain, the working point of the HSOM is established close to a Hopf bifurcation point. The traditional figures of merit used to characterize the linearity of conventional mixers cannot be directly applied to characterize the behavior of autonomous circuits, because of the influence of the input RF signal power on the autonomous signal parameters. The 1 dB compression point and the third order distortion will be analyzed as a function of the harmonic content and maximum gain of the circuit. From the collected data, the optimum harmonic content and the maximum conversion gain of the HSOM can be selected, for a particular application, in order to minimize the output IF signal distortion.

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Section: Introductionmentioning

confidence: 99%

New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

Fernández

Hoeye²,

Vázquez³

et al. 2012

PIER

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“…In addition, continuously scaling down of gate length and the consequently increased of operation frequency have made MOSFET devices be the attractive candidate in RFIC application (LNA, mixer, etc.) [1][2][3][4]26], and then much attention has been paid to radio frequency integrated circuit based on CMOS processes. To predict the accurate performance of the circuit at required frequency bands and also reduce the design cycle, device models are very critical in circuit design session [5-7, 27, 28].…”

Section: Introductionmentioning

confidence: 99%

An Ann-Based Small-Signal Equivalent Circuit Model for Mosfet Device

Li¹,

Li²,

Quan³

2012

PIER

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“…Although various kinds of amplifiers have been developed in [3][4][5][6], coupled-line circuit is not applied usually. In addition, impedance matching is a basic and important concept in microwave engineering [7,8].…”

Section: Introductionmentioning

confidence: 99%

A Novel High-Power Amplifier Using a Generalized Coupled-Line Transformer With Inherent Dc-Block Function

Wu¹,

Liu²,

Li³

et al. 2011

PIER

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Abstract-The purpose of this paper is to propose a novel generalized single-band transformer for two arbitrary complex load and source impedances and a novel high-power amplifier using this new transformer. By adding two reactive parts at across terminals, the coupled line with flexible electrical length has practical evenand odd-mode characteristic impedances. Thus, the total circuit layout can be realized on common printed circuit board without any restriction. The synthesis theory of this proposed transformer is complete and analytical. Furthermore, unlike conventional quarterwavelength transformers, this structure exhibits four main features such as effective matching for extremely low-resistive load impedance, effective matching for extremely high-resistive load impedance, tunable characteristic for equivalent electrical length and inherent DC-block function. For theoretical verification, several impedance transformers, which include some fixed operating-frequency cases and a tunable case, for smaller than 7 Ohm or larger than 1500 Ohm, are presented. As a typical experimental example, this analyzed transformer with inherent DC-block function has been applied in a 4-Watt power amplifier as output matching structure.

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Wideband LNA Using a Negative gm Cell for Improvement of Linearity and Noise Figure

Cited by 21 publications

References 21 publications

New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

New Non-Linear Approach for the Evaluation of the Linearity of High Gain Harmonic Self Oscillating Mixers

An Ann-Based Small-Signal Equivalent Circuit Model for Mosfet Device

A Novel High-Power Amplifier Using a Generalized Coupled-Line Transformer With Inherent Dc-Block Function

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