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请参考 THS4522规格书 "8.4.1.2 DC-Coupled Input Signal Path Considerations for Single-Ended to Differential Conversion". 与你的应用类似，增益不一样。
这段文字就是你加2.5V偏置的用法。"If the source swings from ground to some positive voltage, grounding RG2 gives a unipolar output differential swing from both outputs at VOCM (when the input is at ground) to one polarity of swing. Biasing RG2 to an expected midpoint for the input signal creates a differential output swing around VOCM."
