Tzanov, Mihail Hristov; Manolov, Emil Dimitrov; Koparanov, Filip Todorov
Sigma-delta modulator prototyping using FPAA
Proceedings of the Technical University – Sofia, 56(1), 2006, pp. 35-40
TU - Sofia
sigma-delta modulator; field programmable analog array (FPAA); time-domain analysis; A/D and D/A converters; switched capacitor; SC circuits
The paper presents the results from sigma-delta modulator prototyping. It briefly describes the classic structure of first and second order sigma-delta modulators. Three circuits of first order sigma-delta modulators and one circuit of a second order sigma-delta modulator were designed using Field Programmable Analog Array (FPAA). Their operation was examined in time domain at different constant input voltages and at sinewave input signal. The circuits were practically implemented and experimented by means of Evalution Board AN221E04 – a product of Anadigm Inc. The obtained results confirm the effectiveness of the designed prototypes. The proposed sigma-delta modulators can be applied in research and educational practice for designing programmable SC circuits and FPAA based systems.
Reviewer prof. Tanya Vassileva. - Formulas, schemes, diagr. - References, pp. 40