This converter uses an SG1524 integrated circuit, which is uncommon nowadays. The circuit is from an 80's documentation.
A girator reverses the impedance of a signal. Thus, a low impedance signal at the input appears as high...
An interesting option is the one that makes use of the MC3373 integrated circuit and which is...
This setting appears other times in this section from other sources. This is from an 80's American...