FREQUENCY MONITORING DEVICE Russian patent published in 1999 - IPC

Abstract RU 2138829 C1

FIELD: measuring technology prestart monitoring of frequency. SUBSTANCE: device includes pulse shaper 1, counter 2, flip-flops 3, 4, 5, univibrators employing Shmitt flip-flops 6 and 7 and 2 NAND gate 8. EFFECT: enhanced accuracy of monitoring signals due to comparison of duration of pulses of univibrators with total duration of several periods of input signal whose number is determined by means of counter. 2 dwg

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RU 2 138 829 C1

Authors

Alekseenkov A.E.

Ivanov B.R.

Zakharov I.S.

Nekrasov I.S.

Dates

1999-09-27—Published

1998-09-14—Filed