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- [3] SYNTHESIS OF ACTIVE RC NETWORKS EMPLOYING A DIFFERENCE AMPLIFIER ARCHIV DER ELEKTRISCHEN UND UBERTRAGUNG, 1969, 23 (09): : 445 - +
- [6] ON ACTIVE RC SYNTHESIS USING AN OPERATIONAL AMPLIFIER PROCEEDINGS OF THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, 1965, 53 (10): : 1648 - &