Active-R tunable integrators using a current differencing buffered amplifier
Abstract
Some new active-R integrator realisation schemes using the transadmittance pole of a current differencing buffered amplifier (CDBA) element are presented. The time constant (τ) is tunable by a single resistor whereas the integrator quality factor (Q) can be made very large with suitable realisability design. The active sensitivities of τ and Q are extremely low. As an application, a variable frequency sinusoid oscillator utilising the integrators in a loop has also been designed. Practical results using the hardware implementation and by PSPICE macromodel simulation are included for a frequency range of 1 MHz < f < 24 MHz.
- Publication:
-
International Journal of Electronics, Volume 97, Issue 2, 2010, pp.129-137
- Pub Date:
- February 2010
- DOI:
- 10.1080/00207210903168835
- Bibcode:
- Keywords:
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- integrator;
- active-R circuit;
- CDBA
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