Residual error signal receiving circuit, transmission circuit, processing circuit, analog-to-digital converter, processing device and equipment

CN120880448APending Publication Date: 2025-10-31TSINGHUA UNIVERSITY
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Patent Information

Application Number
CN202510990399.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-17
Publication Date
2025-10-31

AI Technical Summary

Technical Problem

In existing analog-to-digital converter array structures, the transmission of residual signals across modules suffers from high input impedance, leading to signal bandwidth attenuation and distortion, poor transmission consistency and stability, and difficulty in meeting the requirements of high-speed, high-precision and scalable applications.

Method used

An impedance cancellation circuit and a transimpedance amplifier are used to reduce the input impedance at the receiving end through a Kelvin connection. A common-source cascode input structure with enhanced gain is constructed using a replica switch and amplifier to suppress signal bandwidth attenuation and distortion, thereby improving transmission consistency and stability.

Benefits of technology

It significantly reduces the input impedance of the residual signal receiver, decreases the RC time constant, increases the effective bandwidth of signal transmission, and ensures the integrity of the residual signal at high frequencies and the consistency and stability of transmission between modules.

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Abstract

The invention relates to a residual error signal receiving circuit, a transmission circuit, a processing circuit, an analog-to-digital converter, a processing device and equipment. The residual error signal receiving circuit comprises a receiving end gating switch, an impedance offset circuit and a trans-impedance amplifier, a first end of the receiving end gating switch is coupled with the residual error bus, a second end of the receiving end gating switch is coupled with a first input end of the trans-impedance amplifier, and the receiving end gating switch is used for acquiring a residual error signal in a current form from the residual error bus; the trans-impedance amplifier is used for amplifying the residual error signal in the current form and converting the residual error signal into a residual error signal in the voltage form; the impedance offset circuit is used for offsetting conduction impedance generated by the gating switch at the receiving end, and the impedance offset circuit comprises a reetching switch, a first amplifier and a second amplifier. Therefore, the input impedance of the residual error signal receiving end can be obviously reduced, signal bandwidth attenuation and signal distortion caused by high input impedance and parasitic capacitance are inhibited, and the consistency and stability of residual error signal transmission between different analog-to-digital conversion modules are improved.
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Citation Information

Patent Citations

  • Analog-to-digital converter, signal processing device and equipment

    CN118783962A