What is the difference between CCD sensor and CMOS sensor of digital camera? Which is more professional?

Ccd and CMOS can use the same chemical elements, both cadmium sulfide and indium antimonide. Due to the differences in technology, some use ccd and some use CMOS.

The advantage of CCD lies in its good imaging quality. However, due to the complex manufacturing process, only a few manufacturers can master it, so the manufacturing cost remains high, especially the large CCD, which is very expensive. At the same time, in recent years, CCD has developed from 300,000 pixels to 6 million now, and the improvement of pixels has reached the limit.

One advantage of CMOS image sensor is that its power consumption is lower than that of CCD. In order to provide excellent image quality, CCD has paid a high power consumption. In order to make the charge transfer smooth and reduce noise, it is necessary to improve the transfer effect through high voltage difference. CMOS image sensor converts the charge of each pixel into voltage, and then reads it after amplification. It can be driven by 3.3V power supply, which consumes less power than CCD. Another advantage of CMOS image sensor is its high integration with peripheral circuits, which can integrate ADC and signal processor together, thus greatly reducing its size. For example, CMOS image sensor only needs one set of power supply, while CCD needs three or four sets of power supply. Because the technology of ADC and signal processor is different from that of CCD, it is difficult to reduce the size of CCD suite. But at present, the primary problem of CMOS image sensor is to reduce noise.

With the development of technology, CMOS is better and better than CCD. However, at present, large array CCD is still better than COMS, but it is extremely expensive. In the field of photography, coms is as good as CCD at present.