This circuit can generate signals of different frequencies, switched by a DC voltage. The frequencies are determined by the crystals. The circuit is from a 90s American documentation.
By polarizing the reference with the supply voltage we can use these amplifiers in logic circuits....
The circuit we present was found in an English magazine from 1973. The complementary pair of power...
Found in an American documentation from 1969, this circuit operates at a frequency determined by the...