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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 2.7-V 300-MS/s track-and-hold amplifier
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A 2.7-V 300-MS/s track-and-hold amplifier

机译:2.7V 300-MS / s采样保持放大器

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A fully differential bipolar track-and-hold amplifier (THA) employs an open-loop linearization technique compatible with low supply voltage. A feedthrough reduction method utilizes the junction capacitance of a replica switch to provide a close match to the junction capacitance of the main switch. The differential full-scale (FS) input range is 0.5 V. In the track mode, with f/sub in/=10 MHz, FS sinewave input, the measured total harmonic distortion (THD) is less than -72 dB. With f/sub s/=300 MS/s and f/sub in/=10-50 MHz, FS sinewave input, the measured THD is less than -65 dB. This THD measurement reflects the held values as well as the tracking components of the output waveform. With f/sub s/>10 MS/s and f/sub in/=10-50 MHz, FS sinewave input, the measured feedthrough is less than -60 dB. The hold capacitance is 2.5 pF and the differential droop rate is 16 mV//spl mu/s. The THA consumes 32 mW from a 2.7-V power supply and is fabricated in a 0.5-/spl mu/m, 18-GHz BiCMOS process.
机译:全差分双极采样保持放大器(THA)采用与低电源电压兼容的开环线性化技术。减小馈通的方法利用复制开关的结电容来提供与主开关的结电容的紧密匹配。差分满量程(FS)输入范围为0.5V。在跟踪模式下,当f / sub in / = 10 MHz,FS正弦波输入时,测得的总谐波失真(THD)小于-72 dB。在f / sub s / = 300 MS / s和f / sub in / = 10-50 MHz,FS正弦波输入的情况下,测得的THD小于-65 dB。该THD测量反映了保持值以及输出波形的跟踪分量。在f / sub s />为10 MS / s和f / sub in / = 10-50 MHz,FS正弦波输入的情况下,测得的馈通小于-60 dB。保持电容为2.5 pF,差分下降速率为16 mV // spl mu / s。 THA从2.7V电源消耗32mW功率,并以0.5- / spl mu / m,18-GHz BiCMOS工艺制造。

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