INFRARED EMITTING DIODE DRIVING CIRCUIT AND REMOTE CONTROL

摘要

An infrared emitting diode driving circuit includes a first resistor includes a first terminal and a second terminal, a second resistor, and a transistor with the emitter grounded via the second resistor. The circuit further includes an infrared emitting diode with the anode connected to a power source and the cathode connected to the collector of the transistor. A control chip of the circuit turns the transistor on and off. The control chip is connected to a first terminal of the first resistor. The circuit further includes a voltage clamping unit to clamp voltage at the base of the transistor to a fixed value. One end of the voltage clamping unit is connected to the second terminal of the first resistor and the base of the transistor, and another end of the voltage clamping unit is grounded.

主权项

1. An infrared emitting diode driving circuit comprising:
a first resistor comprising a first terminal and a second terminal; a second resistor; a transistor with the emitter grounded via the second resistor; an infrared emitting diode with the anode connected to a power source and the cathode connected to the collector of the transistor; a control chip to turn the transistor on and off, wherein the control chip is connected to a first terminal of the first resistor; and a voltage clamping unit to clamp voltage at the base of the transistor to a fixed value, wherein, one end of the voltage clamping unit is connected to the second terminal of the first resistor and the base of the transistor, and another end of the voltage clamping unit is grounded.