Control circuit for an airbag release unit

Details Control circuit for an airbag release unit Control circuit for an airbag release unit

1998-08-28

2000-02-01

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

B60L 100

Patent

active

060206551

ABSTRACT:
An airbag control circuit comprises a transformer having a primary coil connected to a first sub-circuit and a secondary coil connected to a second sub-circuit, an ignition impedance for initiating deployment of the airbag, a first energy storage device connected to the secondary coil of the transformer, wherein the first sub-circuit transmits a first signal to the second sub-circuit via the transformer, and wherein the first signal charges the first energy storage device, a first sender/receiver unit connected to the secondary coil of the transformer and receiving the first signal, and a frequency analyzer connected to the first sender/receiver unit, wherein the frequency analyzer connects the first energy storage device to the ignition impedance in response to a predetermined change in a frequency of the first signal. The circuit further comprises a first gate in the second sub-circuit for releasing a second signal to the second coil, when the first signal is received for a predetermiened time and when the ignition impedence has a defined value.

REFERENCES:
patent: 5856710 (1999-01-01), Baughman et al.

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