This circuit is from a 60's documentation. The capacitance C1 can be between 20 pF and 0.01 uF depending on the generated frequency. Equivalent transistors may be employed.
This circuit was found in a 1978 publication. Equivalent operational amplifiers can be used. The...
This instrumentation circuit was obtained in the National Semiconductor's Linear Applications...
This circuit produces a sinusoidal signal whose frequency can be calculated using the formula in...