Double-edge triggering high-speed digital-to-analog converter

Abstract

The invention relates to a digital-to-analog converter, in particular to a double-edge triggering high-speed digital-to-analog converter, belonging to the field of integrated circuits. The double-edge triggering high-speed digital-to-analog converter comprises a clock circuit, a data multiplexer, a gating unit and a current helm unit. The clock circuit is used for generating clock signals; the data multiplexer is used for converting each path of input data into two paths of complementary data; the gating unit is used for carrying out logic operation on the data generated by the data multiplexer and the clock signals to generate control signals; and the current helm unit has an input end connected with the gating unit and is used for receiving control signals and outputting differential current analog signals. Compared with the traditional single-edge triggering DAC Digital-to-Analog Converter), the double-edge triggering DAC sends out data half an hour before or after the DAC conversion clock so as to convert data twice in a clock period, and can obtain twice effective sampling rate of the traditional single-edge triggering DAC at the same clock rate so as to provide users with wider signal bandwidth or higher carrier frequency.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a digital-to-analog converter. Background technique [0002] In the last two decades, with the rapid development of large-scale and ultra-large-scale integrated circuits, digital signal processing has been more and more widely used. For example, the traditional analog TV broadcasting system will be replaced by the emerging digital TV broadcasting system in the next few years; digital CD, MP3 players, digital recorders and digital cameras will gradually replace the old analog recorders and cameras; mobile communication The system has been digitized as early as more than ten years ago, and the compact multifunctional digital mobile phone has replaced the bulky analog mobile phone; the traditional analog test instruments (such as oscilloscopes, spectrum analyzers) have also been replaced by digital test instruments ,etc. Compared with analog signal processing, digital signal pro...

AI Technical Summary

Problems solved by technology

However, the traditional current-steering digital-to-analog converters are single-edge triggered DACs, and the input data is single-edge triggered, which generally lasts for one clock cycle. On the rising or falling edge of each clock cycle, all current switches are turned on or off. The input data is converted into an analog current signal output. The sampling rate of this traditional single-edge trigger DAC is relatively low, and the data can only be converted once in a clock cycle.

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