An Analog Gabor Transform Using Sub-Threshold 180-nm CMOS Devices

An Analog Gabor Transform Using Sub-Threshold 180-nm CMOS Devices

The Gabor transform can be used to represent a signal in terms of a set of pseudo basis functions, allowing a signal to be split into parallel paths of a lower bandwidth. An analog Gabor transform using sub-threshold CMOS continuous time filters designed from time domain impulse responses is describ...

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Veröffentlicht in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2009-12, Vol.56 (12), p.2597-2608
Hauptverfasser: Tuckwell, M., Papavassiliou, C.
Format: Artikel
Sprache:eng
Schlagworte:
Analog circuits
Bandwidth
Circuits
CMOS
Consumption
continuous time filters
Continuous wavelet transforms
Design methodology
Devices
Discrete transforms
Discrete wavelet transforms
Frequency
Gabor filters
Gabor transform
integrated circuits
Mathematical models
Power consumption
Power system modeling
Semiconductor devices
Signal analysis
sub-threshold CMOS
Transforms
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Zusammenfassung:The Gabor transform can be used to represent a signal in terms of a set of pseudo basis functions, allowing a signal to be split into parallel paths of a lower bandwidth. An analog Gabor transform using sub-threshold CMOS continuous time filters designed from time domain impulse responses is described. A novel method for designing low power gm-C filters using simple models of identical transconductors is used to specify the transistor sizes. Measured results show that the transform consumes 7 ¿W for an input signal bandwidth of 4 kHz, making it suitable for ultra low power systems.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2009.2023837