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CA3280, CA3280A
Data Sheet May 2002 FN1174.
6
Dual, 9MHz, Operational Transconductance Amplifier (OTA)
The CA3280 and CA3280A types consist of two variable operational
amplifiers that are designed to substantially reduce the initial input offset
voltage and the offset
voltage variation with respect to changes in programming current.
This design results in reduced “AGC thump,” an objectionable characteristic of many AGC systems.
Interdigitation, or crosscoupling, of critical portions of the circuit reduces the amplifier dependence upon thermal and processing variables.
The CA3280 has all the generic characteristics of an operational
voltage amplifier except that the forward transfer charac...