The invention discloses a high-speed and high-precision
image signal analog-to-
digital conversion circuit, belongs to the technical field of conversion circuits, the high-speed and high-precision
image signal analog-to-
digital conversion circuit comprises a multi-stage pipeline circuit, a
delay alignment register array and a digital calibration circuit. Each stage of pipeline circuit comprises a sampling and holding module, two sub ADC modules, a sub DAC module, a subtraction circuit, a margin amplification module and an output register, an analog input
signal is a group of pipeline circuits;firstly, a
signal is sampled and held in the sampling and holding module; then, the signals are input into the sub ADC modules to be quantized; a
digital signal is output to the output register and the sub DAC module; the sub-DAC modules convert signals into analog signals and then output the analog signals to the subtraction circuit, the analog signals are subtracted from the sampled and held signals, then the signals are amplified by a certain multiple through the margin amplification module and output to the
delay alignment register array, the conversion speed is increased, the conversion quality is improved through comparison, and errors are avoided.