Obtained in a 1969 Ferranti documentation, this circuit dissipates only 2.2 mW with 4.5 V. The circuit can be designed based on modern equivalent transistors.
This circuit is used to test an inductor (coil) allowing the observation of its opration in an R-L...
The LM11 operational amplifier is not common today. The circuit was obtained in the Linear...
The transistor in this circuit can be the BC558 and the capacitors must be ceramic. Crystals from...