Active and Passive Electronic Components / 2009 / Article / Fig 2

Research Article

Electronically Tunable Dual-Input Integrator Employing a Single CDBA and a Multiplier: Voltage Controlled Quadrature Oscillator Design

Figure 2

Experimental results.
(a) Integrator response with square wave excitation of  V(peak) at 1 MHz using  K.ohm,  K.ohm,  K.ohm,  pF (measured)  pF and  V.d.c.
(b) VCQO-tuning characteristics with  nF
(c) VCQO wave-response with build-up feature tuned for  MHz
(d) Nyquist plot of loop function measured in the vicinity of with above keys. Nominal tuned frequency : A 1 MHz B 0.72 MHz C  0.5 MHz
(e) Frequency spectrum of the loop-function measured at the tuned frequency of 1 MHz

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