Source driving circuit, source driving chip and display apparatus

A source driving circuit comprising:

• a first conversion circuit, a second conversion circuit, a comparison circuit, a switch control circuit and an output circuit, wherein:
• the first conversion circuit is configured to receive a data signal of an image to be displayed, and convert the data signal into a first analog signal;
• the comparison circuit is configured to compare a current frame of the data signal with a previous frame of the data signal, generate a pre-charging voltage signal according to a result of the comparison, and output the pre-charging voltage signal to the second conversion circuit;
• the second conversion circuit is configured to convert the pre-charging voltage signal into a second analog signal;
• the switch control circuit is configured to receive the first analog signal and the second analog signal, output the second analog signal to the output circuit at a rising edge of the control signal and output the first analog signal to the output circuit at a falling edge of the control signal;
• and
• the output circuit is configured to output the received first analog signal and second analog signal to a corresponding data line of a display panel.