| 摘要 |
A scheme for transforming input digital information into output analog information where the output is a specified and not necessarily linear function of the input is disclosed. In its simplest form, the circuitry for achieving this result consists of a ladder network, a waveshaping impedance, and a signal generator connected in series. Each rung of the ladder network is a series impedance and gate circuit associated with a specified digital position in the input code and the corresponding impedance is weighted as a function of its positional significance. An output operational amplifier may optionally be provided which serves to invert and appropriately shift the output signal to achieve the desired output waveform.
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