Implementation of 13.56 MHz Crystals in Oscillators for Wireless Power Charging Applications

This research analyzes the performance improvement of a 13.56 MHz crystal oscillator for wireless power charging applications. The circuit used is a pierce oscillator circuit with CMOS 74HC04N, amplified by a common collector amplifier. The method is to adjust the resistor and capacitor values and use other transistors. In its manufacture, capacitors made from ceramic and mylar are used to analyze the output. The performance results of the crystal oscillator using a ceramic capacitor produce a signal with a strength of 10 dBm and a peak amplitude of 3.16V, while the crystal oscillator using a mylar capacitor produces a signal with a strength of -2 dBm and a peak amplitude of 2.22V at a frequency of 13.56 MHz These results show that the crystal oscillator using ceramic capacitors performs better than the crystal oscillator using mylar capacitors.