This circuit generates a sinusoidal signal with only -80 dB THD. The circuit was found in a 90's EDN. The frequency is 25 kHz and the components used are from that time.
I found This circuit is in a documentation of transistors from 1958. It uses germanium PNP...
The consumption of this circuit is only 50 uA in the standby condition and 4.5 mA when supplying a pulse...
This circuit, obtained from a 1989 publication, can control motors up to 1.5 A. With the LM350 this...