Compression sampling analog-to-digital converter using sampling and quantification circuit

Abstract

The invention provides a sampling and quantification circuit used for a compression sampling analog-to-digital converter and belongs to the field of mixed signal integration circuit design technology. According to the invention, a signal processing procedure including signal observation, error estimation, signal calibration and signal restoration for error correction and a sampling and quantification circuit realization structure with multi-way parallel sampling, simulation domain integration and signal quantization device quantification are provided. The sampling and quantification circuit realization structure successively inputs all simulation sampling and integration results into the same quantification device, so a mismatching problem in a multi-way quantification process is effectively reduced; complexity in realization of a compression sampling analog-to-digital converter system is reduced; and the sampling and quantification circuit is designed with modules, so independence and universality of designing of all modules are improved.

Description

technical field [0001] The invention relates to a compressed sampling analog-to-digital converter using a sampling quantization circuit, belonging to the technical field of mixed signal integrated circuit design. Background technique [0002] The basic idea of ​​an analog-to-digital converter (Analog-to-Digital Converter, hereinafter referred to as ADC) is to quantize a continuous analog signal within a certain range through the steps of sampling, holding, quantization, and encoding in a specific way, and the quantization result It is represented by a set of specific digital codes and used as the input signal of the digital processing system. The traditional analog-to-digital converter is limited by the Nyquist sampling theorem, and the signal must be sampled at a frequency higher than twice the processing signal bandwidth. High requirements, subject to factors such as technology, the speed and accuracy of the current quantizer cannot match the information requirements proc...

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Problems solved by technology

Moreover, each channel of this structure requires a quantizer, so the overall structure is more complicated, and there are problems of quantizer mismatch and loop filter mismatch.

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