FIELD: measuring.
SUBSTANCE: invention relates to the field of automation, robotic and measuring technology, and is intended for detection of the moment of transition (from negative to positive half-wave) of the input bipolar harmonic signal voltage over the zero level, can be used in apparatuses for measuring time intervals, in particular. The null detector is comprised of a first and second operational amplifiers, a first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth and thirteenth resistors, a capacitor, a current limiter unit, an output signal regulator, a diode, and a Schmitt trigger.
EFFECT: increased reliability, accuracy of detection of the zero input signal level and output signal quality and interference immunity.
1 cl, 4 dwg
Title | Year | Author | Number |
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ZERO-ELEMENT | 2019 |
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Authors
Dates
2021-09-08—Published
2020-08-11—Filed