Digital-to-analog converter

Abstract

The invention adopts full modeling circuit design and, based on a new circuit realizing structure, provides a super high-speed digital to analog converter with 8-digit precision and 2Ghz rate, all realized by the adoption of CMOS process design. The main body of the digital to analog converter is comprised of the following components: low-pressure difference signal receiver, line temperature encoder, field temperature encoder, forestage locking device, gating unit matrix, backdrop locking device, current source matrix and time tree. The invention adapts to the volume of digital signal inputted at super-high speed; solves the issue of skew signals; meanwhile increases the carrying capacity; directly outputs votage signal; meanwhile enhances I-V converting rate; strengths the symmetry of design; increase the precision of outputted signals; and adds fake switch in the current source matrix so as to enhance the precision of I-V conversion. The invention can be widely applied to military and civil use, such as: deep-space detection, electronic countermeasure, radio navigation, precise guidance, mobile communication as well as high resolution digital TV.

Description

technical field [0001] The invention belongs to the field of integrated circuits, and in particular relates to a digital-to-analog converter. Background technique [0002] Digital-to-Analog Converter (DAC for short) is a device that converts digital signals into corresponding analog signals. The DAC converts the digital signal processed by the digital signal processor into the corresponding analog signal. It is the interface between the digital system and the analog system, and is an important part of the signal processing system. Ultra-high-speed digital-to-analog converter DAC is an important part of the signal processing system, and it is widely used in military and civilian fields such as deep space exploration, electronic countermeasures, radio navigation, precision guidance, mobile communications, and high-definition digital television. [0003] Generally speaking, DAC chips are divided into two categories: resistor string and current steering. Most ultra-high-speed ...

AI Technical Summary

Problems solved by technology

[0004] In general low-speed or medium-speed DACs, the temperature decoders, latches, gating cell matrix, and clock trees are generally synthesized directly with digital integrated circuit design tools; based on the current technological development level, directly use The circuit speed synthesized by digital integrated circuit design tools is difficult to meet the speed requirement of 2GHz

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