DEVICE WITH BUILT-IN SIGNAL DISCRIMINATION AND OUTPUT SYNCHRONIZATION CIRCUITS

摘要

An electrical unit, such as an ambient condition detector, incorporates pattern discrimination circuitry. A received pattern is analyzed and, if it is in accordance with a predetermined pattern, the unit outputs an audible and/or visible indicium synchronized with the incoming pattern for the duration thereof. Th e unit also includes circuitry for emitting a corresponding output signal pattern t o at least one other detector. A system which incorporates a plurality of electrical units, at least one of which has the pattern discrimination circuitry produces at leas t one synchronized audible or visible output indicative of a predetermined conditi on throughout the system. Patterns can include predetermined tonal alarm indicating output patterns as well as predetermined visible alarm indicating output patterns.