POWER SUPPLY APPARATUS FOR AN ELECTRICAL APPLIANCE

摘要

A power supply apparatus includes a power supply circuit and a power-on circuit. The power-on circuit detects a remotely transmitted control signal and causes a transition of the power supply circuit to a turned on state. The power-on circuit includes a transducer configured to provide a power-on signal in response to the remote control signal. The transducer triggers transition to the turned on state through a switch driven by the power-on signal output from the transducer and arranged to supply a power supply circuit enable signal. A DC blocking capacitor is connected between an output of the transducer and a control terminal of the switch.

主权项

1. An apparatus, comprising:
an infrared sensing circuit configured to generate an enable signal in response to receipt of an infrared control signal; and a power supply circuit having an input coupled to receive said enable signal, said power supply circuit configured to generate a supply voltage; wherein said infrared sensing circuit comprises:
a photodiode having an output;a switch having a control terminal coupled to the photodiode output and a first conduction terminal configured to supply said enable signal;a zener diode coupled between the control terminal of the switch and the first conduction terminal; anda DC blocking capacitor coupled between the photodiode output and the control terminal of the switch.