This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with modern equivalents. Output transistors may be BD135 and 136 with heatsinks.
We found this touch control on a Popular Electronics from 1970. The circuit makes use of an...
In the figure we have an interesting circuit for those with a project that requires a sub-multiple...
This circuit was found in an application note of the Linear Technology LTC1145. The circuit can be used...