Circuit arrangement for determining the average value of a frequ

Details Circuit arrangement for determining the average value of a frequ Circuit arrangement for determining the average value of a frequ

1976-11-12

1978-02-14

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92EV, 235 92CC, 235 92R, 324 78D, G01R 2302, G06M 314

Patent

active

040734323

ABSTRACT:
A known arrangement for continuously averaging a frequency comprises a counter whose count-up input receives a measuring signal and whose count-down input receives the delayed measuring signal, by which the averaging period is determined. However, spurious signals produce a cumulative indication error. In order to avoid this, an additional counter is included which each time counts the measuring signal from zero onwards and after the predetermined time interval transfers its count to the measuring counter and starts again at zero. As a result, the measuring counter is always corrected after the predetermined time interval so that errors cannot accumulate. The predetermined time interval can be obtained by means of a further counter. For delaying the measuring signal, a RAM can be used which is controlled by the further counter.

REFERENCES:
patent: 3683345 (1972-08-01), Faulkes et al.
patent: 3735347 (1973-05-01), Whitney et al.
patent: 3868498 (1975-02-01), Guggenbuhl
patent: 3956616 (1976-05-01), Knollenberg

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