Frequency measurement circuit

Details Frequency measurement circuit Frequency measurement circuit

1997-08-07

1999-07-27

Vu, Huy D.

Pulse or digital communications

Repeaters

Testing

370503, 327 48, 375224, G01R 2302, H03D 300, H03K 906

Patent

active

059302941

ABSTRACT:
A counter circuit and a frame control circuit receive a reference clock signal and one or more external clock signals. The counter circuit in combination with the frame control circuit measures the frequency of the external clock signal using either a high frequency measurement mode or a low frequency measurement mode. In the high frequency mode, the number of clocks in the external clock signal are counted for a known time period determined by a high frequency reference clock signal. In the low frequency mode, reference clocks are counted by the counter circuit for a second time period determined by the external clock signal frequency. The measurement circuit automatically switches between the high and low frequency measurement modes according to a minimum clock count value. If the number of external clocks counted during the frequency measurement mode is less than the minimum clock count value, the measurement circuit switches to the alternate frequency measurement mode.

REFERENCES:
patent: 4112358 (1978-09-01), Ashida
patent: 4215308 (1980-07-01), Kusters
patent: 5719782 (1998-02-01), Mitsuoka
patent: 5748570 (1998-05-01), Komoda

Affiliated with

Also associated with

Rating

Frequency measurement circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency measurement circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency measurement circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-887944