Digital frequency meter
A digital frequency meter and frequency technology, applied in the field of digital frequency meter, can solve the problems of narrow frequency measurement range, inability to adapt, large volume, etc., and achieve the effect of improving the frequency measurement range
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] The embodiment of the present invention discloses a digital frequency meter, see figure 1 As shown, the frequency meter includes: a first zero-crossing comparison circuit 1, a GAL module circuit 2 (GAL, generic array logic, general array logic) and a microcontroller 3 connected in sequence, and the GAL module circuit 2 includes a plurality of cascaded GAL counters ;
[0039] The first zero-crossing comparison circuit 1 is used to convert the input sinu...
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