Sampling time error digital estimation method of TIADC

The invention discloses a TIADC sampling time error digital estimation method, and belongs to the field of electronic circuits. For the M-channel TIADC, enabling M output signals of the M-channel TIADC to pass through a Hilbert filter to obtain complex signals subjected to 90-degree phase shift after conversion; the output signals of the adjacent channels of the M-channel TIADC are multiplied, and the signals of the adjacent channels converted by the Hilbert filter are multiplied; adding the sums, obtaining the sums through a triangle sum-difference formula, and performing moving average on the sums through a moving average device to obtain the sums; obtaining a difference value of sampling time errors of adjacent channels through an anti-cosine function; and assuming that the sum of the sampling time errors is 0, solving the numerical value of the sampling time errors in parallel. The method is suitable for the TIADC with any number of channels. When hardware is realized, the adder and the multiplier can be