Signal conditioning circuit and method

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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307519, 307517, 377 41, 377 42, G01R 2306

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active

049124196

ABSTRACT:
An apparatus and method for detecting the period of a frequency signal having a period greater than a minimum period and within a period range. A clock frequency is generated such that when multiplied by the predetermined range the product is less than 2.sup.N and when multiplied by the minimum period of the product is less than 2.sup.N+M. The resulting clock frequency is multiplied by the minimum period to generate an offset number. A counter is preset with the offset number in response to a detected edge transition of the frequency signal. The counter counts at the clock frequency from a complement of the offset number to a final count at a subsequent edge transition. The final count is contained within the first N bits and is related to the period of the frequency signal.

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Institution of Electrical Engineers Paper Entitled "Rapid--Response Frequency Measurement Using Analogue Period Process", vol. 11, No. 16, pp. 383-384, 8/7/75.

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