CMOS capacitive charging circuit for electrical detonators

Details CMOS capacitive charging circuit for electrical detonators CMOS capacitive charging circuit for electrical detonators

1991-12-09

1992-07-07

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

Ignition or detonation circuit

102206, F42C 1106

Patent

active

H00010685

ABSTRACT:
In an electrical detonator, an electrical circuit includes a network for rging the fire pulse capacitor. After battery activation and gun launch, but before arming, the circuit (via an n channel MOS transistor within the CMOS) operates to ground the fire pulse capacitor. At "arm minus 50 msec", the n channel is turned OFF and the p channel transistor is turned ON. This charges the fire pulse capacitor to the battery voltage within 50 msec. The CMOS issues an "ARM COMMAND" to fire the piston actuator (PA) discharging the fire pulse capacitor until PA fires. The fire pulse capacitor is recharged in the 50 msec interval between ARM and FIRE. Logic within the CMOS is used to monitor the fire pulse capacitor. These circuits will detect premature voltage on the fire pulse capacitor and DUD the fuze.

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