Programmable attenuator (CB6793E)

This circuit was found in Harris' 90s documentation. The used component is uncommon today.

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5A Regulator (CB2179E)
This circuit was found in an Electronics Now from the 90's. The integrated regulator circuit and...
Power Operational Amplifier LM195 (CB14267E)
This circuit is suggested by National Semiconductor in its Linear Applications Handbook. It makes...
Rectangular Oscillator LM393 (CB4485E)
The circuit shown is from the 1993 Motorola Linear Interface ICs. The power source may be common...