This circuit generates sinusoidal signals from 15 Hz to 15 kHz. The circuit is from Electronics Now magazine from December 1995. The power supply must be dual.
Using a voltage comparator, we find this AND gate on a Popular Electronics from the 90s. The...
This crystal oscillator circuit is indicated for use as a frequency reference in the calibration...
Any operational amplifier can be used in this circuit. The 741 is the most common. Power supply must...