| 摘要 |
A single analog-digital converter (either analog-to-digital or digital-to-analog) is employed to simultaneously digitize both an AC information signal and a low frequency or DC control signal. The separate signals are added prior to conversion and are separated according to their frequency after conversion. Thus, a DC control signal can be digitized without the need for a second converter and without substantially reducing the dynamic range available for converting the main information signal.
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