Found in General Electric's 1969 documentation, this circuit uses two Foto Darlingtons to control the SCRs driving phases. SCRs can be equivalent current types.
This configuration can be found at several points in this section and on this website. With the...
The circuit in the figure indicates when the input voltage exceeds a certain value adjusted by the...
This receiver was obtained in a documentation from the 90's and is of the super-regenerative type....