Programmable OTA-Based Multifunction Active Filter
A fully programmable multifunction filter is presented. The filter uses four operational transconductance amplifiers and two capacitors. Analog switches are used to control the filter transfer function through a microcontroller. The user is provided control over the cutoff (or centre) frequency of t...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1994-01-01
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| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/1994/10413 |
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| Summary: | A fully programmable multifunction filter is presented. The filter uses four operational transconductance
amplifiers and two capacitors. Analog switches are used to control the filter transfer function through
a microcontroller. The user is provided control over the cutoff (or centre) frequency of the filter by
controlling the auxiliary bias currents of the operational transconductance amplifiers via digital-to-analog
converters. The circuit can simultaneously provide three programmable transfer functions in a
single structure and can realize all the standard second-order filters. The circuit is attractive for VLSI
implementation. |
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| ISSN: | 0882-7516 1563-5031 |