| 摘要 |
<p>A circuit for supplying two regulated supply voltages to the amplifier/comparator (40) of a recirculation of remainder analog to digital converter, comprises a series pair of transistors (84,86) connected as emitter followers. Outputs of the emitter followers (84,86) are applied to the supply terminals of the amplifier/comparator (40). The junction voltage as input between two Zener diodes (76,78) is controlled by a difference amplifier (66). The output of the difference amplifier (66) causes the regulated supply voltages to track a common mode signal component. Another pair of Zener diodes (72,73) between the output of the amplifier/comparator (40) and the input to the difference amplifier (66) prevents saturation of the amplifier/comparator (40).</p> |
