This old common analog telephone circuit was found in 1967 American documentation. The circuit uses only passive components.
The circuit in the figure is a current regulator with adjustment in the range of 0 to 3 amps. The...
For signals up to about 500 kHz modulated in amplitude and transmitted by the power network, the...
Suggested by Philips in 1966 documentation, this limiter can be found elsewhere on this website....