This is the factory setting (National Semiconductor) of the TDA2006 as an audio amplifier. The circuit works with 24 V and the diodes can be 1N4148.
The original frequency of the Pierce Oscillator with bipolar transistor is given by the crystal, which...
Used in radio reception, this circuit was found in the February 1983 Radio Electronics magazine. The...
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....