Variable gain operational amplifier (CB8068E)

This circuit is from an Electronics Now from the 90s. It applies to almost any operational amplifier. See formulas for component calculation.

| Clique na imagem para ampliar |

Low Noise Phono Amplifier (CB4762E)
This turntable amplifier can be used for media recovery by turning it into digital form, for...
Unijunction Modulated Siren (CB12338E)
This circuit produces a modulated tone set at P1. The modulation depth is set at P1 and the pitch...
Low Noise Instrumentation Amplifier (CB4910E)
We find this circuit in the manual of the used integrated circuits. The manual is from Linear...