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Allpass filter employing one grounded capacitor and one active element

Allpass filter employing one grounded capacitor and one active element

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A simple first-order current-mode allpass filter employing a Z-copy current inverter transconductance amplifier (ZC-CITA) and one grounded capacitor is presented. The natural frequency of the filter can be simply controlled by the transconductance of the CITA. On-chip experiments confirm the design assumptions.

References

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