Patent ID: 6304180
Filing Date: 2001-10-16
Classification: H05B,Y02B

Abstract:
An occupancy sensor operable to provide occupancy signals to at least one control device, said sensor comprising:an input voltage terminal for receiving an input voltage;sensing circuitry operable to sense occupancy within a designated area, said sensing circuitry including an opamp that amplifies signals indicating occupancy;output circuitry coupled to said sensing circuitry and operable to generate a first occupancy signal, said output circuitry including a capacitor that charges and discharges in response to signals received from said sensing circuitry, said output circuitry also including an output transistor whose ON/OFF state is determined by whether said capacitor is charged or discharged;a first output terminal coupled to said output transistor of said output circuitry for outputting said first occupancy signal; andvoltage regulation circuitry operable to regulate either AC or DC input voltages within a range of voltages, said range having a lower limit between about 3 volts and about 9 volts and an upper limit not exceeding about 380 volts, said regulation circuitry coupled to said input voltage terminal, to said sensing circuitry, and to said output circuitry, said regulation circuitry including a variable resistance coupled to said input voltage terminal.