SAWTOOTH GENERATOR HAVING STORING ACTION

摘要

A gas discharge tube isolates the storage condenser of a sawtooth wave generator of an electronic tuning device from the pulses that charge it up and, more rapidly, discharge it in a scanning cycle. A first electronic switch grounds a clamping diode to reverse the polarity of the pulses and thus discharge the storage condenser. A second electronic switch provides a hold function by reducing the amplitude of the charging pulses (taken from a TV line scanning flyback circuit) so that they cannot fire the gas discharge tube.