Analysis of a high frequency and wide bandwidth active polyphase filter based on CMOS inverters
Wernehag, Johan LU and Sjöland, Henrik LU
(2009)
In Analog Integrated Circuits and Signal Processing
59(3).
p.243-255
- Abstract
- An active polyphase filter capable of high frequency quadrature signal generation has been analyzed. The resistors of the classical passive polyphase filter have been replaced by transconductors, CMOS inverters [1,2]. A three-stage 0.13 um CMOS active polyphase filter has been designed. Simulations with a differential input signal show a quadrature error less than 1◦ for the full stable input voltage range for frequencies from 6 GHz to 14 GHz. Phase errors in the differential input signal are suppressed at least 3 times at the output. Corner simulations at 10 GHz show a maximum phase error of 3◦ with both n- and pMOS slow, in all other cases the error is less than 0.75◦. The three-stage filter consumes 34 mA from a 1.2 V supply. To... (More)
- An active polyphase filter capable of high frequency quadrature signal generation has been analyzed. The resistors of the classical passive polyphase filter have been replaced by transconductors, CMOS inverters [1,2]. A three-stage 0.13 um CMOS active polyphase filter has been designed. Simulations with a differential input signal show a quadrature error less than 1◦ for the full stable input voltage range for frequencies from 6 GHz to 14 GHz. Phase errors in the differential input signal are suppressed at least 3 times at the output. Corner simulations at 10 GHz show a maximum phase error of 3◦ with both n- and pMOS slow, in all other cases the error is less than 0.75◦. The three-stage filter consumes 34 mA from a 1.2 V supply. To investigate the robustness of the filter to changes in inverter delay, an inverter model was implemented in Verilog-A. Linear cin and gin were used, whereas gm, cout, and gout were non-linear. It was found that the filter could tolerate substantial delays. Up to 40◦ phase shift resulted in less than 1.5◦ quadrature phase error at the output. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1366845
- author
- Wernehag, Johan
LU
and Sjöland, Henrik
LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- RF, Active polyphase filter, Quadrature generation, CMOS
- in
- Analog Integrated Circuits and Signal Processing
- volume
- 59
- issue
- 3
- pages
- 243 - 255
- publisher
- Springer
- external identifiers
-
- wos:000264618400002
- scopus:67650922396
- ISSN
- 0925-1030
- DOI
- 10.1007/s10470-008-9261-y
- language
- English
- LU publication?
- yes
- id
- 2181817b-be37-4ebe-a08e-e7b142e89c7f (old id 1366845)
- date added to LUP
- 2016-04-01 14:37:23
- date last changed
- 2025-04-04 14:19:27
@article{2181817b-be37-4ebe-a08e-e7b142e89c7f,
abstract = {{An active polyphase filter capable of high frequency quadrature signal generation has been analyzed. The resistors of the classical passive polyphase filter have been replaced by transconductors, CMOS inverters [1,2]. A three-stage 0.13 um CMOS active polyphase filter has been designed. Simulations with a differential input signal show a quadrature error less than 1◦ for the full stable input voltage range for frequencies from 6 GHz to 14 GHz. Phase errors in the differential input signal are suppressed at least 3 times at the output. Corner simulations at 10 GHz show a maximum phase error of 3◦ with both n- and pMOS slow, in all other cases the error is less than 0.75◦. The three-stage filter consumes 34 mA from a 1.2 V supply. To investigate the robustness of the filter to changes in inverter delay, an inverter model was implemented in Verilog-A. Linear cin and gin were used, whereas gm, cout, and gout were non-linear. It was found that the filter could tolerate substantial delays. Up to 40◦ phase shift resulted in less than 1.5◦ quadrature phase error at the output.}},
author = {{Wernehag, Johan and Sjöland, Henrik}},
issn = {{0925-1030}},
keywords = {{RF; Active polyphase filter; Quadrature generation; CMOS}},
language = {{eng}},
number = {{3}},
pages = {{243--255}},
publisher = {{Springer}},
series = {{Analog Integrated Circuits and Signal Processing}},
title = {{Analysis of a high frequency and wide bandwidth active polyphase filter based on CMOS inverters}},
url = {{http://dx.doi.org/10.1007/s10470-008-9261-y}},
doi = {{10.1007/s10470-008-9261-y}},
volume = {{59}},
year = {{2009}},
}