We find this circuit in a 1980s Linear Technology documentation. The circuit can be implemented on the basis of more modern equivalent components.
Toshiba MOSV MOSFETs These and others from the same line of Toshiba power MOSFETs are available from...
June 2017 - Mouser Electronics has a broad line of Cree products for use in horticulture, such as...
August 2017 - Mouser Electronics is stocking the new Molex optical EMI shielding adapters. These...