Cart (Loading....) | Create Account
Close category search window
 

Current-Reused 2.4-GHz Direct-Modulation Transmitter With On-Chip Automatic Tuning

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Amir-Aslanzadeh, H. ; Department of Design Engineering, Xilinx Inc., San Jose, CA, USA ; Pankratz, E.J. ; Mishra, C. ; Sanchez-Sinencio, E.

This paper presents the design, analysis, and experimental verification of a self-calibrating current-reused 2.4-GHz direct-modulation transmitter for short-range wireless applications. The key contributions are the design/analysis of a stacked power amplifier (PA)/voltage-controlled oscillator (VCO) architecture, the nonlinear frequency-dependent analysis of a Gilbert-cell-based root-mean-square detector, and an on-chip $LC$-tank calibration circuit that needs no analog-to-digital convertor (ADC)/digital signal processor. The stacked architecture reduces the number of required regulators, utilizes supply headroom effectively, and allows for an “ADC-less” calibration loop that can dynamically tune the PA center frequency by sensing the transmitted signal. The very nature of direct-modulation architecture obviates additional high-purity signal generators, reducing complexity and allowing online calibration. The system was implemented in TSMC 0.18 $mu{rm m}$ CMOS, occupies 0.7 ${rm mm}^{2}~({rm TX})+0.1~{rm mm}^{2}$ (self-tuning), and was measured in a QFN48 package on an FR4 PCB. Automatically correcting PA/VCO tank misalignment in this case yielded ${>}{rm 4}~{rm dB}$ increase in output power. With the automatic tuning active, the transmitter delivers a measured output power ${>}{rm 0}~{rm dBm}$ to a 100-$Omega$ differential load, and the system consumes 22.9 mA from a 1.8-V core-circuit supply.

Published in:

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:21 ,  Issue: 4 )

Date of Publication:

April 2013

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.