An analog signal readout circuit array with a variable number of output channels and a readout method

Abstract

The invention discloses an analog signal readout circuit array and a readout method with a variable number of output channels. The third circuit array in the circuit array is divided into different sets, and the working mode switching signal input terminals of the third circuit array in each set are connected together as the working mode of the corresponding set of the analog signal readout circuit array Switch the signal input end; by adding a buffer on the key node of the analog signal path, thereby increasing the driving ability of the analog signal when it flows between the output channels, it is less affected by the parasitic parameters of the physical wire; the circuit array and the external The signal connection method meets the requirements of the splicing process.

Description

Technical field [0001] The present invention relates to a signal readout circuit in a circuit system, and more particularly to a signal readout circuit array and a reading method applied to an analog signal output. Background technique [0002] For high-speed array acquisitions and final output digital signals, internal due to physical area, internal interference, etc. (for example, a partially high frame rate image sensor), The column direction readout circuit output analog signal to the system, and then converts the external analog-to-digital converter into a digital signal is a feasible solution. Further, depending on the application, the number of channels of the signal output of such circuit systems also has a difference: multi-channel output can achieve relatively higher signal output frequencies, relatively small output channels more conducive to larger circuit systems Integration, reduce development difficulty (for example using image sensor camera development), so that t...

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