A Low Voltage Tuned Colpitt’s Oscillator Using CDTA
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Abstract
In this paper by using current differencing trans-conductance amplifier (CDTA) as an active building block COLPITT’s oscillator has been proposed. The oscillator is realized by a single block of CDTA, two capacitors and an inductor. The resistor is replaced by a NMOS transistor connected to z terminal of the CDTA. The frequency of the oscillation can be controlled by the tank circuit. The oscillator can produce oscillation of frequency ranging from 10KHz to 100MHz. The operation of the proposed Colpitt’s oscillator has been verified using SPICE. The CDTA was implemented on 350nm CMOS technology
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