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- Title
New Gain Controllable Resistor-less Current-mode First Order Allpass Filter and its Application.
- Authors
Jaikla, Winai; Noppakarn, Aekkarat; Lawanwisut, Supawat
- Abstract
New first order allpass filter (APF) in current mode, constructed from 2 CCCCTAs and grounded capacitor, is presented. The current gain and phase shift can be electronically /orthogonally controlled. Low input and high output impedances are achieved which make the circuit to be easily cascaded to the current-mode circuit without additional current buffers. The operation of the proposed filter has been verified through simulation results which confirm the theoretical analysis. The application example as current-mode quadrature oscillator with non interactive current control for both of oscillation condition and oscillation frequency is included to show the usability of the proposed filter.
- Subjects
BANDPASS filters; ELECTRIC resistors; CAPACITORS; PHASE shifters; ELECTRIC impedance; FREQUENCIES of oscillating systems
- Publication
Radioengineering, 2012, Vol 21, Issue 1, p312
- ISSN
1210-2512
- Publication type
Article