Direct current converter

The DC-DC converter has a primary half-bridge which is connected in parallel to a primary terminal (10a) and is provided with a series circuit comprising switching elements (13a,13c). A secondary half-bridge is connected in parallel to a secondary terminal (10b) and is provided with a series circuit comprising switching elements (13b,13d). A throttle (12) is provided for connecting midpoint of primary half-bridge with midpoint of secondary half-bridge. An independent claim is included for circuit device.