A polyphase filter based on CMOS inverters

Fred Tillman; Henrik Sjöland

doi:10.1109/NORCHP.2005.1596977

A polyphase filter based on CMOS inverters

Fred Tillman, Henrik Sjöland

Department of Electrical and Information Technology

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

11 Citations (SciVal)

Abstract

A new idea for generation of quadrature signals on chip is presented. The topology is based on a passive RC polyphase filter, where the resistive parts are made active by using inverters. The active filter combines quadrature generation, isolation, and gain without losing quadrature performance compared to a regular RC polyphase filter. The filter technique is demonstrated in a 10GHz front-end application where a broadband VCO drives an active polyphase filter to generate quadrature LO signals. By avoiding a quadrature VCO and tuned buffers, significant reductions in chip area are possible

Original language	English
Title of host publication	[Host publication title missing]
Publisher	IEEE - Institute of Electrical and Electronics Engineers Inc.
Pages	12-15
ISBN (Print)	1-4244-0064-3
DOIs	https://doi.org/10.1109/NORCHP.2005.1596977
Publication status	Published - 2005
Event	NORCHIP Conference, 2005 - Oulu, Finland Duration: 2005 Nov 21 → 2005 Nov 22

Conference

Conference	NORCHIP Conference, 2005
Country/Territory	Finland
City	Oulu
Period	2005/11/21 → 2005/11/22

Subject classification (UKÄ)

Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

active filter
quadrature generation
10 GHz
passive RC filter
tuned buffers
quadrature LO signals
voltage controlled oscillator
polyphase filter
CMOS inverters

Access to Document

10.1109/NORCHP.2005.1596977

Cite this

@inproceedings{c1f6bd19695c4553bea213ad4cd990c3,

title = "A polyphase filter based on CMOS inverters",

abstract = "A new idea for generation of quadrature signals on chip is presented. The topology is based on a passive RC polyphase filter, where the resistive parts are made active by using inverters. The active filter combines quadrature generation, isolation, and gain without losing quadrature performance compared to a regular RC polyphase filter. The filter technique is demonstrated in a 10GHz front-end application where a broadband VCO drives an active polyphase filter to generate quadrature LO signals. By avoiding a quadrature VCO and tuned buffers, significant reductions in chip area are possible",

keywords = "active filter, quadrature generation, 10 GHz, passive RC filter, tuned buffers, quadrature LO signals, voltage controlled oscillator, polyphase filter, CMOS inverters",

author = "Fred Tillman and Henrik Sj{\"o}land",

year = "2005",

doi = "10.1109/NORCHP.2005.1596977",

language = "English",

isbn = "1-4244-0064-3",

pages = "12--15",

booktitle = "[Host publication title missing]",

publisher = "IEEE - Institute of Electrical and Electronics Engineers Inc.",

address = "United States",

note = "NORCHIP Conference, 2005 ; Conference date: 21-11-2005 Through 22-11-2005",

}

TY - GEN

T1 - A polyphase filter based on CMOS inverters

AU - Tillman, Fred

AU - Sjöland, Henrik

PY - 2005

Y1 - 2005

N2 - A new idea for generation of quadrature signals on chip is presented. The topology is based on a passive RC polyphase filter, where the resistive parts are made active by using inverters. The active filter combines quadrature generation, isolation, and gain without losing quadrature performance compared to a regular RC polyphase filter. The filter technique is demonstrated in a 10GHz front-end application where a broadband VCO drives an active polyphase filter to generate quadrature LO signals. By avoiding a quadrature VCO and tuned buffers, significant reductions in chip area are possible

AB - A new idea for generation of quadrature signals on chip is presented. The topology is based on a passive RC polyphase filter, where the resistive parts are made active by using inverters. The active filter combines quadrature generation, isolation, and gain without losing quadrature performance compared to a regular RC polyphase filter. The filter technique is demonstrated in a 10GHz front-end application where a broadband VCO drives an active polyphase filter to generate quadrature LO signals. By avoiding a quadrature VCO and tuned buffers, significant reductions in chip area are possible

KW - active filter

KW - quadrature generation

KW - 10 GHz

KW - passive RC filter

KW - tuned buffers

KW - quadrature LO signals

KW - voltage controlled oscillator

KW - polyphase filter

KW - CMOS inverters

U2 - 10.1109/NORCHP.2005.1596977

DO - 10.1109/NORCHP.2005.1596977

M3 - Paper in conference proceeding

SN - 1-4244-0064-3

SP - 12

EP - 15

BT - [Host publication title missing]

PB - IEEE - Institute of Electrical and Electronics Engineers Inc.

T2 - NORCHIP Conference, 2005

Y2 - 21 November 2005 through 22 November 2005

ER -

A polyphase filter based on CMOS inverters

Abstract

Conference

Subject classification (UKÄ)

Keywords

Access to Document

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Cite this