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A minimal integrated filter containing four MOS transistors as the only circuit elements is presented. Voltage tuning is used to set the cutoff frequency and band-edge peaking. A filter test chip occupies an active area of 0006mm2, has acutoff frequency of 40 MHz and dissipates 580W.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_19870551
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content/journals/10.1049/el_19870551
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