Machine-translated by Google. Questions are authored in English.
Top

Discussion

In a ramp type digital voltmeter the quantity actually counted is

  • A.the number of zero crossings of the input during a fixed interval
  • B.the time for a linear ramp to pass the input voltage
  • C.the number of clock pulses needed to charge a capacitor to the input voltage
  • D.the number of standard steps required to equal the input voltage

Answer: B

A ramp starts above the input and falls; a gate opens when it crosses the input and closes when it crosses zero, and the clock pulses passed in that interval are proportional to the input. It is simple and quick but depends on the linearity of the ramp and the stability of the clock.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.