Abstract: A direct current (dc) overvoltage, pre-regulation circuit regulates dc voltage supplied to a cable television line amplifier. The circuit provides overvoltage protection while permitting continuous operation of the line amplifier. The circuit opens the input to the downstream continuous voltage regulation circuit and cyclically charges a filter storage capacitor by periodic applications of the un-clipped voltage. The repeated switching regulates the dc voltage such that operation is sustained during periods of overvoltage that would normally shut down conventional circuits. No overall feedback is required to control the active device.