US 11,742,872 B2 · Ad converter

Abstract

Provided is an AD converter, including: an analog signal input circuit, configured to be input with an analog input signal, and output a first analog output signal based on the analog input signal and a second analog output signal based on the analog input signal at different timing; an integral circuit, configured to integrate the first analog output signal and the second analog output signal and output the first integral signal and the second integral signal; a predictive circuit, configured to predict an integral signal output after the output by the integral circuit based on the first integral signal and the second integral signal output by the integral circuit, and output a predictive integral signal; and a quantization circuit, configured to generate a digital signal with the predictive integral signal quantized.

Claims16

Dependent claims

An AD converter, comprising:

an analog signal input circuit, configured to be input with an analog input signal, and output a first analog output signal based on the analog input signal and a second analog output signal based on the analog input signal at different timing;
an integral circuit, configured to integrate the first analog output signal and the second analog output signal to output the first integral signal and the second integral signal;
a predictive circuit, configured to predict an integral signal output after the output by the integral circuit based on the first integral signal and the second integral signal output by the integral circuit, and output a predictive integral signal;
and
a quantization circuit, configured to generate a digital signal with the predictive integral signal quantized.

2 more elements

An AD converter, configured to divide an Mth (M is an integer equal to or greater than 2) conversion period into X periods (X is an integer equal to or greater than 2), and repeatedly perform an integral operation and a sampling operation during the conversion period, comprising:

an analog signal input circuit, configured to output an analog output signal based on an input analog input signal that is input, respectively, during each of the X periods equally divided from the conversion period;
an integral circuit, configured to integrate an output of the analog signal input circuit;
a predictive circuit, configured to:
predict an integral signal output from the integral circuit during a last (Xth) period of the Mth conversion period divided into the X periods, based on
an integral signal output from the integral circuit during a last (Xth) period of an immediately preceding ((M−1)th) conversion period divided into X periods and an integral signal output from the integral circuit in one of (1st to (X−1)th) periods other than the last (Xth) period of the X periods divided from the Mth conversion period, or
each integral signal of two different periods in one of the (1st to (X−1)th) periods other than the last (Xth) period of the X periods divided from the Mth conversion period, and
output a predictive integral signal;
and
a quantization circuit, configured to generate a digital signal with the predictive integral signal quantized.

6 more elements

Dependencies are inferred from the claim text.

Ad converter

Life of this patent

Ad converter

Life of this patent

Abstract

Claims16