A Compressed Sampling Analog-to-Digital Converter Using Sampling and Quantization 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 and quantization circuit, and belongs to the technical field of mixed-signal integrated circuit design. Background technique [0002] The basic idea of ​​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 quantize the quantized signal. The result is represented by a specific set of digital codes and used as the input signal to 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 twice higher than the processing signal bandwidth, so the application of high-frequency signal processing puts forward a better performance of the ADC. High requirements, subject to fac...

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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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