How to Build Single-Ended to Differential Output Circuit Without Amplifiers?

The discussion addresses the challenge of converting a single-ended DC input signal to a differential output without using any amplifiers, motivated by the desire to minimize noise spectral density (NSR) in the signal path. Initial suggestions include using a transformer for AC signals, but this is unsuitable for DC. Alternatives such as active phase inverters and transistor-based phase inverters were mentioned, though these may be considered amplifiers depending on the definition. An optocoupler was also proposed as a DC-compatible isolation method. The original poster clarified the application involves an accelerometer chip with a single output feeding a differential input ADC. A practical solution discussed involves connecting the accelerometer output to the ADC positive input and the accelerometer ground to the ADC negative input, ensuring both devices share a common power supply with separate lines to reduce noise. This approach avoids active amplification while providing a differential input to the ADC.
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