Digital-to-analog converter

Abstract

The invention adopts full analog circuit design, and based on a new circuit realization structure, provides an ultra-high-speed digital-to-analog converter with a precision of 8 bits and a rate of 2 GHz, all of which are designed and realized by CMOS technology. The main part of the digital-to-analog converter is composed of the following parts: low-voltage differential signal receiver, row temperature decoder, column temperature decoder, front-stage latch, gating cell matrix, post-stage latch, current Source matrix, clock tree. The invention adapts to ultra-high-speed input digital signal volume; solves the problem of signal skew and increases the load capacity at the same time; directly outputs the voltage signal and improves the I-V conversion rate; strengthens the symmetry of the design and improves the accuracy of the output signal; switch, improving I-V conversion accuracy. The invention has important applications in both military and civilian applications, such as deep space exploration, electronic countermeasures, radio navigation, precise guidance, mobile communication, and high-definition digital television.

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

Images