Integrated circuitry

An integrated circuitry, comprising:

• a first circuit, a first power supply positive terminal of the first circuit electrically coupled to a power source;
• a second circuit electrically coupled in series with the first circuit and the power source, wherein a second power supply positive terminal of the second circuit is electrically coupled to a first power supply negative terminal of the first circuit;
• a second power supply negative terminal of the second circuit is electrically coupled to a reference potential voltage;
• and
• a voltage conversion circuit electrically coupled between the first circuit and the second circuit, wherein the voltage conversion circuit is configured to receive a signal from the first circuit or the second circuit, and convert a voltage value of the signal according to a first low potential signal of the first power supply negative terminal and a second low potential signal of the second power supply negative terminal.