DPO is designed using a PLL chip LM565, the centre frequency of VCO within which is controlled by 8031 microcontroller using a Resistor Array implemented by CMOS CD4066 switches.

• 该振荡器使用一片PLL电路LM565,其VCO的中心振荡频率由8031单片机经由CMOSCD4066开关所接的电阻阵列来控制。