A low-power differential input to single-ended output digital-to-analog converter (DAC) is presented, which is capable of providing radio frequency (RF)-signals with a data rate of up to $\mathrm {8~G}$ bit/s. A constant direct current (dc) current source is realized as a self-bootstrapping device in the presented 0.25- $\mu \text{m}$ in-house gallium nitride (GaN) technology. First, measurements with a low-power [1-V peak–peak voltage ( $V_{pp}$ )] differential input signal show the feasibility of switching constant currents with a clock frequency of up to 2 GHz. Furthermore, a 2-b DAC that uses a differential sampling to generate RF-signals is introduced. Measurement results prove the feasibility of synthesizing custom-modulated voltage waveforms with data rates of up to 8 Gbit/s in the sub-6-GHz frequency range.

中文翻译：

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低功耗差分输入至单端输出GaN RF-DAC，用于产生RF信号

提出了一种低功耗差分输入至单端输出数模转换器（DAC），该转换器能够提供数据速率高达的射频（RF）信号 $ \ mathrm {8〜G} $ 位/秒。在提出的0.25- $ \ mu \ text {m} $ 内部氮化镓（GaN）技术。首先，使用低功率[1-V峰峰值电压（ $ V_ {pp} $ ）]差分输入信号显示了以高达2 GHz的时钟频率切换恒定电流的可行性。此外，还介绍了使用差分采样生成RF信号的2-b DAC。测量结果证明了在低于6 GHz的频率范围内以高达8 Gbit / s的数据速率合成定制调制的电压波形的可行性。