Ambient radio waves have largely been ignored as a potential powersource until recently, because the power of a broadcast radio signal rapidly decreases with distance.
Reference source outputs a stable reference signal which is independent of power supply voltage, temperature and process.
其输出的基准信号稳定，与电源电压、温度以及工艺的变化无关。
3
The analog part mainly includes powersource, power control, signal generation, signal modulation, high voltage output control and feedback control circuit.