Abstract: A firing circuit for deploying a pair of air bags comprises two circuit legs connected in parallel across a voltage supply. Each circuit leg comprises in series a safing sensor, a squib, and a crash sensor, with each sensor being shunted by a like resistor having a nominal resistance substantially greater than the nominal resistance of the squibs. A first diode bridge comprising a pair of oppositely-biased diodes extends between a first pair of junctions on the circuit legs located between the safing sensors and the squibs thereof. A second diode bridge comprising a pair of oppositely-biased diodes extends between a second pair of junctions on the circuit legs located between the squibs and the crash sensors thereof. A third diode bridge comprising oppositely-biased diodes connected in series also extends between the latter pair of junctions on the circuit legs.