BUILT-IN VOLTAGE DOUBLER IN A MICROCONTROLLER UNIT OF A ONE-CELL BATTERY REMOTE FOR LONG-DISTANCE INFRA-RED (IR) AND LOW-POWER BLUETOOTH LOW ENERGY (BLE) TRANSMISSION

摘要

Embodiments of the present invention provides a microcontroller unit for a short-range wireless transmission (such as IR or BLE) in a one-cell battery powered remote control comprising a voltage doubler for increasing an input voltage provided by the one-cell battery to increase distance of wireless transmission when the remote control is in use and for maintaining original output voltage when the remote control is idle; and a voltage detector for detecting voltage increased by the voltage doubler. The voltage doubler includes an oscillator, a logic control unit and multiple transistors with external capacitors connected to each other. When the voltage doubler is activated, the logic control unit turns on the multiple transistors on and off sequentially to increase the input voltage, at least twice, provided by the one-cell battery to increase the distance of the wireless transmission, and when the voltage doubler is deactivated, the original output voltage is maintained.