| 摘要 |
PURPOSE:To enable the conversion of accurate digital-analog, by determining the respective conduction types with the output signal level of the driving circuit being greater level difference, in the conversion circuit to obtain binary signal corresponding to input signal. CONSTITUTION:Based on 3-bit binary signals A-C inputted to a driving circuit 3, binary signals, inversion a-c and phase-inverted binary signals b-c having either level of the supplied reference voltage -Vs and GND, are fed to a voltage selection circuit 2, and with the level of a binary signal in the driving circuit 3 so that the level difference from the voltages V1-Vs from the reference voltage circuit 1 fed to input points N1-Ns can be greater, either one voltage from voltages V1-Vs is selected by turning on the respective FET for output. Thus, with the input digital signal of small amplitude, accurate voltage corresponding to this digital signal can be output. |
