Semiconductor abbreviation, refers to the manufacture of large-scale integrated circuit chips with a technology or with this technology to manufacture out of the chip. And common light-sensitive components and CCD, cmos and ccd where the difference? And the editor to take a look at it!
cmos and ccd difference
1, the imaging process is different: due to the CCD only one (or a few) output node unified readout, the consistency of its signal output is very good; and CMOS chip, each pixel has its own signal amplifier, each for charge - voltage conversion, the consistency of its signal output is poor.
2, integration is different: CCD can only output analog electrical signals, the need for subsequent address decoder, analog converter, image signal processor processing, and also need to provide three different voltages of the power supply synchronization clock control circuit, the degree of integration is very low.
While CMOS chips can be image signal amplifier, signal reading circuit, A/D conversion circuit, image signal processor and controller integrated into a chip, only one chip can realize all the basic functions of the camera, high integration.
3, different speeds: CCD using one by one photosensitive output, can only be output in accordance with the specified program, slower; CMOS has a number of charge-voltage converter and ranks of switching control, read out a lot faster, most of the 500fps above the high-speed camera is a CMOS camera.
4, the noise is different: CCD technology development is earlier, more mature, the use of PN junction or silicon dioxide (SiO2) isolation layer to isolate the noise, the imaging quality relative to the CMOS photoelectric sensors have certain advantages.
Because of the high degree of integration of CMOS image sensors, components, circuits are very close to each other, the interference is more serious, the noise has a great impact on image quality.