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A voltage-translinear based CMOS signal component separator chip for linear LINC transmitters

Shi, B and Sundström, Lars LU (2002) In Analog Integrated Circuits and Signal Processing 30(1). p.31-39
Abstract
The LINC transmitter is an architecture that provides linear amplification using nonlinear but power efficient amplifiers. One crucial signal processing function of LINC is the signal component separator (SCS) which forms two constant-amplitude phase-modulated signals from the source signal. This paper presents an analog SCS chip implemented in a 0.35 mum CMOS process using a novel design based on the so-called voltage-translinear circuit principle. An experimental LINC transmitter was built with the SCS chip, nonlinear amplifiers and a power combiner. Test results showed that all output spurious levels some -55 dBc and -48 dBc could be obtained with a North American Digital Cellular (NADC) signal and an IS-95 signal, respectively. This... (More)
The LINC transmitter is an architecture that provides linear amplification using nonlinear but power efficient amplifiers. One crucial signal processing function of LINC is the signal component separator (SCS) which forms two constant-amplitude phase-modulated signals from the source signal. This paper presents an analog SCS chip implemented in a 0.35 mum CMOS process using a novel design based on the so-called voltage-translinear circuit principle. An experimental LINC transmitter was built with the SCS chip, nonlinear amplifiers and a power combiner. Test results showed that all output spurious levels some -55 dBc and -48 dBc could be obtained with a North American Digital Cellular (NADC) signal and an IS-95 signal, respectively. This implies a high degree of linearity. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
LINC, power amplifiers, RF, translinear circuits, linear transmitters, analog CMOS circuits
in
Analog Integrated Circuits and Signal Processing
volume
30
issue
1
pages
31 - 39
publisher
Springer
external identifiers
  • wos:000171485800004
  • scopus:0036174057
ISSN
0925-1030
DOI
10.1023/A:1012496620216
language
English
LU publication?
yes
id
1b3861d9-0bce-47b7-b3de-f800c8962164 (old id 352083)
date added to LUP
2007-11-13 14:59:31
date last changed
2017-01-01 07:21:52
@article{1b3861d9-0bce-47b7-b3de-f800c8962164,
  abstract     = {The LINC transmitter is an architecture that provides linear amplification using nonlinear but power efficient amplifiers. One crucial signal processing function of LINC is the signal component separator (SCS) which forms two constant-amplitude phase-modulated signals from the source signal. This paper presents an analog SCS chip implemented in a 0.35 mum CMOS process using a novel design based on the so-called voltage-translinear circuit principle. An experimental LINC transmitter was built with the SCS chip, nonlinear amplifiers and a power combiner. Test results showed that all output spurious levels some -55 dBc and -48 dBc could be obtained with a North American Digital Cellular (NADC) signal and an IS-95 signal, respectively. This implies a high degree of linearity.},
  author       = {Shi, B and Sundström, Lars},
  issn         = {0925-1030},
  keyword      = {LINC,power amplifiers,RF,translinear circuits,linear transmitters,analog CMOS circuits},
  language     = {eng},
  number       = {1},
  pages        = {31--39},
  publisher    = {Springer},
  series       = {Analog Integrated Circuits and Signal Processing},
  title        = {A voltage-translinear based CMOS signal component separator chip for linear LINC transmitters},
  url          = {http://dx.doi.org/10.1023/A:1012496620216},
  volume       = {30},
  year         = {2002},
}