Analog signal reading circuit array with variable output channel number and reading method

Abstract

The invention discloses an analog signal reading circuit array with variable output channel number and a reading method. The circuit array is obtained by combining and connecting working mode switching signal input buses of a fourth circuit array. The third circuit array in the fourth circuit array is divided into different sets, and the working mode switching signal input ends of the third circuit array in each set is connected together to serve as the working mode switching signal input end of the corresponding set of the analog signal reading circuit array; buffers are additionally arrangedon key nodes of an analog signal path, so that the driving capacity of analog signals flowing among output channels is improved, and the influence of parasitic parameters of physical wires is lower;and the signal connection mode between the circuit arrays and the external signal connection mode meet the requirements of a splicing process.

Description

technical field [0001] The invention relates to a signal readout circuit in a circuit system, in particular to a signal readout circuit array and a readout method applied to analog signal output. Background technique [0002] For circuit systems that require high-speed array acquisition and final output of digital signals, but cannot build an analog-to-digital conversion module suitable for high-speed output due to factors such as physical area and internal interference (such as some high-frame-rate image sensors), through It is a feasible solution for the readout circuit in the column direction to output the analog signal to the outside of the system, and then convert it to a digital signal by an external analog-to-digital converter. In addition, depending on the application, the number of channels required for the signal output of this type of circuit system is also different: multi-channel output can achieve a relatively higher signal output frequency, and relatively fewe...

AI Technical Summary

Problems solved by technology

[0005] In summary, the traditional analog signal readout circuit array has problems such as inflexible selection of the total number of output channels, the quality and speed of the output signal cannot be guaranteed at a lower number of channels, and the circuit structure has high requirements for the integrated circuit splicing process.

Images