This circuit was found in an American magazine 73 for radio amateurs of the 80s. It is an automatic transmission circuit for telegraphy. The circuit is TTL.
Phase and amplitude can be controlled in this circuit found in the May 1988 Radio Electronics...
This traditional configuration from a simple 12 V source is from a 1977 publication. The...
This circuit is suitable for applications such as a TTL log digital link. Maximum frequency is...