Ammunition and explosives – Igniting devices and systems – Ignition or detonation circuit
Patent
1996-12-09
1999-07-27
Jordan, Charles T.
Ammunition and explosives
Igniting devices and systems
Ignition or detonation circuit
102210, 102218, 327394, 327398, 327439, 327433, H03K 17687, H03K 17567, F42D 1055
Patent
active
059293683
ABSTRACT:
An electronic delay circuit (10) for use in a detonator (100) has a switching circuit (20) and a timer circuit (22). Switching circuit (20) controls the flow of a stored charge of electrical energy from a storage capacitor (12) to a bridge initiation element such as a semiconductor bridge (18) or a tungsten bridge. The timing of the release of this energy is controlled by timer circuit (22). Switching circuit (20) is an integrated, dielectrically isolated, bipolar CMOS (DI BiCMOS) circuit, whereas timer circuit (22) is a conventional CMOS circuit. The use of a DI BiCMOS switching circuit allows for greater efficiency of energy transfer from the storage capacitor (12) to the semiconductor bridge (18) than has previously been attained.
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J. Childs et al; Digidet.TM. Delay Detonators: . . . Blasting Blasting Technology, Instrumentation and . . . Applications Seminar, Jul. 1995.
D.W. Fyfe et al; BNCP Prototype Detonator Studies using a Semiconductor Bridge Initiator: Abstract, undated.
Ewick David W.
Marshall Paul N.
Rode Kenneth A.
Tseka Thomas C.
Walsh Brendan M.
Jordan Charles T.
Montgomery Christopher K.
Spaeth Frederick A.
The Ensign-Bickford Company
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