Half Wave Fast Rectifier (CB5160E)

This 80's circuit can be made with current comparators. Rectification accuracy is 1% DC up to 100 kHz.

Rectangular Generator with Adjustable Space Mark (CB12079E)
This circuit was found in a 1978 publication. Equivalent operational amplifiers can be used. The...
Variable Gain Differential Amplifier (CB14119E)
This instrumentation circuit was obtained in the National Semiconductor's Linear Applications...
Wien Bridge Oscillator (CB23602E)
This circuit produces a sinusoidal signal whose frequency can be calculated using the formula in...