Circuit architectures for high linearity monolithic continuous-time filtering

Circuit architectures for high-linearity monolithic continuous-time filters are described based on the use of integrated passive components in active RC structures. Tunability of the frequency response is achieved by arranging either resistive or capacitive elements in programmable arrays. The array...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 1992-09, Vol.39 (9), p.651-657
Main Authors: Durham, A.M., Hughes, J.B., Redman-White, W.
Format: Article
Language:English
Subjects:
Active filters
Applied sciences
Circuit optimization
Circuit properties
Councils
Digital signal processing
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filtering
Frequency
Frequency filters
Linearity
Passive filters
Tuning
Voltage
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Summary:Circuit architectures for high-linearity monolithic continuous-time filters are described based on the use of integrated passive components in active RC structures. Tunability of the frequency response is achieved by arranging either resistive or capacitive elements in programmable arrays. The array value is then set using a digital code produced by an on-chip calibration circuit. The advantages and disadvantages of possible configurations are analyzed, indicating the limits of usefulness. Different filter architectures are considered, and design equations for determining basic cell specifications are given. The analyses are compared with results of experimental integrated filter designs, confirming that both very high linearity (-90 dB) and reasonable tuning accuracy (around +or-5%) are achievable.< >
ISSN:1057-7130
1558-125X
DOI:10.1109/82.193320