OTA Based Current-Mode Sinusoidal Quadrature Oscillator Circuits
Abstract
This paper discusses the circuit realization, analysis
and design of OTA based current-mode quadrature oscillators.
The active building blocks used in the oscillator design are SOOTA,
DO-OTAand/ or MO-OTA. The proposed current-mode
oscillator circuitsare derived from integrator based continuoustime
filter structures. The proposed oscillator circuits provide
sinusoidal output currents with 90º phase difference and other
advantages include simplicity, good sensitivity and use of
grounded capacitors.The workability of the proposed oscillators
is verified with SPICE simulations.
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