Proceedings ArticleDOI
Simple polar-loop transmitter for dual-mode Bluetooth
Takashi Oshima,Masaru Kokubo +1 more
- pp 3966-3969
TLDR
A dual-mode transmitter for conventional GFSK-modulated Bluetooth and medium-rate /spl pi//4-DQPSK-mods Bluetooth has been realized using a simple polar-loop method without feedback control from the output of the power amplifier.Abstract:
A dual-mode transmitter for conventional GFSK-modulated Bluetooth and medium-rate /spl pi//4-DQPSK-modulated Bluetooth has been realized using a simple polar-loop method without feedback control from the output of the power amplifier. Phase modulation is performed by two-point modulation with extremely wide bandwidth, and fast power-efficient amplitude modulation utilizes a PWM DC-DC converter which controls the supply voltage of a class-E saturated power amplifier. The simulation has confirmed an output power above 10 dBm, a total power efficiency above 30% and RMS DEVM of 0.050. The proposed transmitter enables a low-cost, low-power single-chip RF-IC for the next-generation Bluetooth communication.read more
Citations
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Journal ArticleDOI
A 1 V 5 mA Multimode IEEE 802.15.6/Bluetooth Low-Energy WBAN Transceiver for Biotelemetry Applications
Alan Wong,Mark Dawkins,Gabriele Devita,Nick Kasparidis,A.G. Katsiamis,Oliver King,Franco Lauria,Johannes Schiff,Alison Burdett +8 more
TL;DR: A transceiver chip for both IEEE802.15.6 Narrow-Band (NB) PHY draft [2] and Bluetooth Low Energy (LE) 4.0 standards as well as proprietary protocols is presented, enabling small-form factor non-intrusive body worn applications.
Proceedings ArticleDOI
A 1V 5mA multimode IEEE 802.15.6/bluetooth low-energy WBAN transceiver for biotelemetry applications
Proceedings ArticleDOI
High efficiency power amplifier based on envelope elimination and restoration technique
Miroslav Vasic,O. Garcia,Jesus A. Oliver,Pedro Alou,D. Diaz,J.A. Cobos,A. Gimeno,J. M. Pardo,C. Benavente,F. J. Ortega +9 more
TL;DR: In this article, a power amplifier that performs envelope modulation and class E amplifier that is used as a non linear amplifier is implemented as a multilevel converter in series with linear regulator and can provide up to 100 W of instantaneous power.
Proceedings ArticleDOI
Power supply rejection for common-source linear RF amplifiers: theory and measurements
Jason T. Stauth,Seth R. Sanders +1 more
TL;DR: In this article, an estimation of the distortion products that arise from power supply noise mixing with the RF signal in a common-source amplifier configuration is presented. Butler et al. extended the classical Volterra-series system analysis to use on a multiple-input system and the second order supply ripple sidebands are predicted relative to the magnitudes of the input signal and supply ripple.
Patent
Modulation apparatus capable of correcting non-linearity of voltage controlled oscillator
TL;DR: In this article, a modulation apparatus consists of a monitoring section 207 operable to monitor information about a control voltage applied to a VCO 201 as control voltage information, during any period, when a low-frequency signal having a frequency within a loop band of a PLL circuit is input at least before an LPF.
References
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D.K. Su,W.J. McFarland +1 more
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TL;DR: An EDGE transmitter, using a non-linear GSM type PA, is presented, and a dual feedback loop ensures robust performance even under VSWR variations.
Proceedings ArticleDOI
A Bluetooth radio in 0.18 μm CMOS
P.T.M. van Zeijl,Johannes Wilhelmus Theodorus Eikenbroek,P.-P. Vervoort,S. Setty,J. Tangenberg,G. Shipton,E. Kooistra,I. Keekstra,Didier Belot +8 more
TL;DR: By using an inductor-less LNA and the extensive use of mismatch simulations, the smallest silicon area for a Bluetooth radio implementation so far can be reached: 5.5 mm.
Journal ArticleDOI
A 1-V CMOS power amplifier for Bluetooth applications
Ka-Wai Ho,Howard C. Luong +1 more
TL;DR: A two-stage power amplifier operated at 2.4 GHz is designed and fabricated in a standard 0.35-/spl mu/m CMOS technology for low-supply voltage operation without degrading the power-added efficiency (PAE).
Proceedings ArticleDOI
A 1V CMOS power amplifier for Bluetooth applications
K.W. Ho,Howard C. Luong +1 more
TL;DR: A two-stage power amplifier operated at 2.4GHz has been designed and fabricated in a standard 0.35/spl mu/m CMOS technology and can be integrated for class 1 Bluetooth application.