This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
The LM117 (217 and 317) provides 1.2 A with output up to 25 V and is manufactured by several...
Found in a 1970 documentation, this circuit makes use of 741 operational amplifiers that are...
In the figure we show an interesting application for integrated circuit 4001. This circuit causes a...