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A Digitally Programmable Differential Integrator with Enlarged Time Constant

By S. K. Debroy, S. K. Sanyal and R. Nandi

Abstract

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

Topics: Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Technology, T, DOAJ:Electrical and Nuclear Engineering, DOAJ:Technology and Engineering
Publisher: Spolecnost pro radioelektronicke inzenyrstvi
Year: 1994
OAI identifier: oai:doaj.org/article:0f188852df48413cb4c11adc87347495
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