We found this circuit in the Linear Applications Handbook of the 1994 National Semiconductor. The transistor must be a high voltage type and the LM3900 power supply must be symmetrical.
The presented circuit is a sinusoidal oscillator for 1 kHz that makes use of the four amplifiers...
This headphone amplifier has good gain and high input impedance. The circuit is from Electronics Now and...
Based on the 4006 this circuit generates random signals in a frequency range that depends on L1...