Ripple Filter (CB6724E)

This circuit was found in a Delco 1965 publication. Transistors may be current equivalents according to the desired output voltage and current.

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Monostable Using the 4027 (CB131E)
A configuration like the one used with the 4013 is also suitable for the 4027. The amount of time...
Phonocaptor Preamplifier with Tone Control (CB13925E)
We found this circuit in the Audio Handbook of the National Semiconductor of 1977. The circuit is used...
Exponential Amplifier (CB19489E)
We found this configuration in an integrated circuits manual. The transistor, which can be of any...