differential frequency meter

differential frequency meter

[‚dif·ə′ren·chəl ′frē·kwən·sē ‚mēd·ər]
(engineering)
A circuit that converts the absolute frequency difference between two input signals to a linearly proportional direct-current output voltage that can be used to drive a meter, recorder, oscilloscope, or other device.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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