Multi-channel sampling holding circuit, sampling method and reading circuit

The invention discloses a multipath sampling hold circuit, a sampling method and a reading circuit, which are applied to the technical field of integrated circuits, and comprise a plurality of signal paths, the signal paths are provided with sampling and holding modules, the sampling and holding modules are connected with a time sequence control module, and the time sequence control module is used for controlling the sampling and holding module after the signal paths hold to-be-sampled signals. Sequentially opening the output ends of the sampling and protecting modules along a preset sequence, and completing the collection of the to-be-sampled signals in the opened signal path; and before the output end of the acquisition and protection module in the next signal path is opened, locking the electric signal of the currently opened signal path as a standard electric signal with a preset fixed size. According to the multi-channel sampling time division multiplexing, the electric signal of the currently opened sig