A Digitally Programmable Differential Integrator with Enlarged Time Constant
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A new Operational Amplifier (OA)-RC integrator network is described. The novelties of the design are used of single grounded capacitor, ideal integration function realization with dual-input capability and design flexibility for extremely large time constant involving an enlargement factor (K) using product of resistor ratios. The aspect of the digital control of K through a programmable resistor array (PRA) controlled by a microprocessor has also been implemented. The effect of the OA-poles has been analyzed which indicates degradation of the integrator-Q at higher frequencies. An appropriate Q-compensation design scheme exhibiting 1 : |A|2 order of Q-improvement has been proposed with supporting experimental observations.
Document typePeer reviewed
Document versionFinal PDF
SourceRadioengineering. 1994, vol. 3, č. 4, s. 11-17. ISSN 1210-2512
- 1994/4