H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 33/08 (2006.01) H03K 17/18 (2006.01) H03K 17/795 (2006.01) H03K 17/00 (2006.01)
Patent
CA 2240264
A reduced current consumption circuit for multiple optical switches (10) having associated status indicator LEDs (26). The reduced current consumption is achieved by electrically connecting the emitter IREDs (14) of each optical switch (10) in series with the status indicator LEDs (26) and a constant current source Ccs (12). Each status indicator LED (26) includes a shunting circuit (34) which removes the LED (26) from the series circuit in response to an output signal from the receiver (18) of its associated optical switch (10) without breaking the series circuit.
L'invention concerne un circuit à consommation de courant réduite pour commutateurs (10) optiques multiples pourvus de diodes (26) électroluminescentes indicatrices d'état associées. On réduit la consommation de courant en connectant électriquement les diodes (14) d'émission infrarouge de chaque commutateur (10) optique en série avec les diodes luminescentes (26) et une source Ccs de courant contact (12). Chaque diode (26) luminescente indicatrice d'état comprend un circuit (34) de shunt qui supprime la diode (26) du circuit en série en réponse à un signal de sortie en provenance du récepteur (18) de son commutateur (10) optique associé sans interrompre le circuit en série.
Fetherstonhaugh & Co.
Square D. Company
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