| US 7,460,024 B1 | ||
| Active sensor circuitry for operating at low power and low duty cycle while monitoring occurrence of anticipated event | ||
| Wei Ma, San Ramon, Calif. (US); and Ahmad Bahai, Lafayette, Calif. (US) | ||
| Assigned to National Semiconductor Corporation, Santa Clara, Calif. (US) | ||
| Filed on Jan. 17, 2006, as Appl. No. 11/306,949. | ||
| Int. Cl. G08B 23/00 (2006.01) | ||
| U.S. Cl. 340—693.3 [73/861.18] | 11 Claims |
| 1. An apparatus including active sensor circuitry for operating at low power and a low duty cycle while monitoring for an
occurrence of an anticipated event, comprising:
early event detection circuitry responsive to external environmental stimuli and one or more control signals by providing
a corresponding detected data signal indicative of whether at least a portion of said stimuli is related to an anticipated
event, and including
a transducer responsive to said stimuli by providing a corresponding transducer signal, and
detection circuitry coupled to said transducer and responsive to said transducer signal and at least one of said one or more
control signals by providing an intermediate signal and said detected data signal; and
control circuitry coupled to said early event detection circuitry and responsive to said intermediate signal by providing
said one or more control signals.
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