Current steering digital-analog converter with time domain error correction function

A technology of error correction and current steering number, which is applied in the field of current steering digital-to-analog converter, can solve the problems of increasing circuit complexity and power consumption, affecting time domain error detection, and low correction accuracy, so as to achieve convenient circuit implementation and high delay adjustment The effect of accuracy and simple circuit structure
CN102769470AActive Publication Date: 2012-11-07ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2012-11-07

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Abstract

The invention discloses a current steering digital-analog converter with time domain error correction function. The current steering digital-analog converter comprises (n+1) digital-analog conversion channels and a time domain error correction unit, wherein the digital-analog conversion channel includes a latch, a time delay circuit and a current element; the time domain error correction unit includes a current square wave detector, a time difference amplifier and a time-digital converter. Due to the presence of the time difference amplifier and the time-digital converter, the time domain error existing in the digital-analog converter can be amplified linearly, and can be directly converted to a digital quantity, thereby greatly improving the time domain error detection accuracy. In addition, the current steering digital-analog converter provided by the invention is easier and rapider in detecting small time domain error; and the correction unit in the invention can be realized completely by using a digital circuit, so that the static power consumption is almost equal to zero.
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Description

technical field

[0001] The invention belongs to the technical field of digital-to-analog conversion, and in particular relates to a current steering digital-to-analog converter with a time-domain error correction function. Background technique

[0002] With the popularization of mobile communication technology and the introduction of the concept of system on chip (SOC), more analog signals and digital signals are integrated into one system chip. Since the development of processors has been able to adapt to the requirements of high-speed digital signal processing, the communication between high-speed processors and peripheral analog signal devices has become the main factor restricting high-speed signal processing systems; thus, in recent years, high-speed high-precision digital-analog Conversion chip design has been greatly developed.

[0003] The current steering digital-analog converter is the most popular high-speed and high-precision digital-analog converter structure, ...

Claims

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