Generation of programmable Composite Operational Amplifiers with a CMOS integrated circuit
Kollmorgen, Gary Steffen
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A general approach for extending the useful operating frequencies of linear active networks is the Composite Operational Amplifier. The Composite Operational Amplifier is generated by replacing single operational amplifiers with a network of N operational amplifiers (C2OA). This novel approach is extended to the integrated circuit. Three, 2 operational amplifier (C20A ), composite forms are integrated on to a single chip. Additionally, the resistor network of the composite is constructed to be digitally programmable making the composite operational amplifiers capable of different Q factors. The chip is constructed with 200 transistors, four capacitors, and 10 resistors as major components. The overall size of the chip is 136 by 185 mils and is packaged in a 24 pin dual in-line package (DIP).
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