Pulse generating circuit
AssigneeU.S. Philips Corporation
InventorDesmond Ross Armstrong
Life of this patent
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Abstract
A pulse is generated in an output transformer and this pulse is used to provide a spark across a spark gap for the purpose of igniting any gas/air mixture present. The circuit operates from a 1.5 volt d.c. source. A blocking oscillator is energized by a two position switch which is operated to a first position, and this charges a capacitor. The capacitor is then discharged through an output transformer to produce the spark when the switch is returned to its original rest position. The winding used to charge the capacitor from the blocking oscillator is also used in the discharge path for the capacitor and this inductive loading provides a slower discharge and a more controlled lower energy spark which is found to be better for gas ignition.
Claims13
A pulse generating circuit comprising a first transformer having a primary winding connected in an oscillator circuit and a secondary winding connected with a diode to a capacitor to provide a charge path for the capacitor, a switch, means connecting the capacitor with the primary winding of a second transformer, and circuit means including at least a part of the secondary winding of the first transformer, the switch and the primary winding of the second transformer for providing a discharge path for the capacitor such that operation of the switch results in a pulse being generated through a secondary winding of the second transformer upon discharge of the capacitor.
A pulse generating circuit comprising a semiconductor amplifier, inductor means coupled to said amplifier, a capacitor, a diode, switching means, a transformer having a primary winding and a secondary winding, first means connecting a part of the inductor means, the diode, and the primary winding of the transformer to the capacitor so as to provide a charge circuit for the capacitor, and second means connecting at least a part of the inductor means, the switching means and said primary winding to the capacitor so as to provide a discharge circuit for the capacitor, operation of said switching means causing the capacitor to discharge and generate an electric pulse in the secondary winding of the transformer.
A pulse generating circuit comprising a semiconductor amplifier, inductor means coupled to said amplifier, a capacitor, a diode, switching means, a transformer having a primary winding and a secondary winding, first means connecting a part of the inductor means, the diode, the primary winding and the capacitor in a first series circuit so as to provide a charge circuit for the capacitor, and second means connecting at least a part of the inductor means, the switching means, the primary winding and the capacitor in a second series circuit so as to provide a discharge circuit for the capacitor, operation of said switching means causing the capacitor the discharge and generate an electric pulse in the secondary winding of the transformer.
A pulse generating circuit comprising a semiconductor amplifier, a capacitor, a diode, switching, means a first transformer having a primary winding and a secondary winding, inductor means comprising a second transformer having a first winding coupled to an output electrode of the semiconductor amplifier and a second winding, first means connecting said second winding, the diode, and the primary winding of the first transformer to the capacitor so as to provide a charge circuit for the capacitor, and second means connecting at least a part of the second winding, the switching means and said primary winding to the capacitor so as to provide a discharge circuit for the capacitor, operation of said switching means causing the capacitor to discharge and generate an electric pulse in the secondary winding of the first transformer.
Dependencies are inferred from the claim text.