A Novel First-Order Current-Mode All-Pass Filter Using CDTA
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This paper presents a new realization of a firstorder current-mode (CM) all-pass filter (APF) using the recently proposed modern active building block (ABB), namely the current differencing transconductance amplifier (CDTA). The CM APF is made using minimum number of components, namely a single CDTA and one grounded capacitor. The circuit does not use any external resistors and offers the advantages of current-tunable pole frequency, low input impedance and high output impedance. Non-ideal analysis and sensitivity analysis are provided and PSPICE simulation results are included to verify the workability of the circuit.
KeywordsCurrent-mode (CM), active building block (ABB), all-pass filter (APF), Current Differencing Transconductance Amplifier (CDTA)
Document typePeer reviewed
Document versionFinal PDF
SourceRadioengineering. 2009, vol. 18, č. 3, s. 300-305. ISSN 1210-2512
- 2009/3