Digital Electronics
A 10 bit A/D conveter is used to digitize an analog signal in the 0 to 6 volt. The maximum peak to ripple voltage that can be allowed in the D.C. supply voltage is

  6 mV.
 5 mV.
  5.85 mV.
 10 mV.

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Digital Electronics
Positive logic in a logic circuit is one in which

logic 0 and 1 are represented by 0 and positive voltage respectively
logic 0 and, -1 are represented by negative and positive voltages respectively
logic 0 voltage level is higher than logic 1 voltage level
logic 0 voltage level is lower than logic 1 voltage level.

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