Patent ID: 8416110
Filing Date: 2013-04-09
Classification: G11C,H03K,H03M

Abstract:
1. A multi-channel analog digital conversion circuit, comprising: a plurality of sampling circuits for sampling and buffering a plurality of groups of analog input signals; a single output circuit coupled to the sampling circuits and shared by the sampling circuits; and a single analog digital conversion core coupled to the output circuit and shared by the sampling circuits; wherein, the sampling circuits at least comprises a first sampling circuit and a second sampling circuit, the first sampling circuit comprises a plurality of first buffer circuit sets, a first switch set and a first capacitor set, the first sampling circuit sampling and buffering a first group of the analog input signals, and the second sampling circuit comprises a plurality of second buffer circuit sets, a second switch set and a second capacitor set, the second sampling circuit sampling and buffering a second group of the analog input signals; and the output circuit comprises an operating amplifier, an output switch set and an output capacitor set.