This Schmitt trigger in current mode for frequencies up to 50 MHz was found in a 1969 Motorola manual. Appropriate switching transistors can be used.
In the figure we have a high stability voltage reference, providing a voltage of 10 V at the...
This circuit is from the National Semiconductor FET Databook. It is possible to shift the phase of a...
This circuit was found in an English magazine from 1978, but it is still current, just change the...