Micro-electronic equal-precision frequency meter

Abstract

The invention discloses a micro-electronic equal-precision frequency meter. The frequency meter comprises a frequency input channel, a time base signal, a synchronous gate control, a main door 1, a main door 2, a counter 1, a counter 2, an AT89C52, a keyboard and an LED digital display, wherein the frequency input channel is electrically connected with the synchronous gate control, the frequency input channel is electrically connected with the main door 1, the synchronous door control is electrically connected with the main door 1, the main door 2, a P1.1 interface of the AT89C52 and a P1.0 interface of the AT89C52, the main door 1 is electrically connected with the counter 1, the counter 1 is electrically connected with a T0 interface of the AT89C52, the main door 2 is electrically connected with the counter 2 and the time base signal, the counter 1 and the counter 2 are connected in parallel to be electrically connected with a P1.2 interface of the AT89C52, the counter 1 and the counter 2 are both electrically connected with a P0 interface of the AT89C52, and the AT89C52 is electrically connected with the keyboard and the LED digital display. The frequency meter has the beneficial effects that limitation in practicability is small, so that the measuring precision is high.

Description

technical field [0001] The invention belongs to the technical field of microelectronic equal-precision frequency meters, and in particular relates to a microelectronic equal-precision frequency meter. Background technique [0002] With the rapid development of microelectronics and computer technology, especially the emergence and development of single-chip microcomputers, traditional electronic measuring instruments have undergone tremendous changes in terms of principle, function, precision and automation level, forming a complete A new generation of measuring instruments that break through traditional concepts. The high-speed integrated circuits and large-scale integrated circuits are widely used in the frequency meter, which has caused major changes in the miniaturization, power consumption, and reliability of the instrument. Traditional frequency meters have large measurement errors, and equal-precision frequency meters will be widely used for their advantages of accura...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of precision frequency meter of microelectronics, to solve the traditional direct frequency measurement method in the above-mentioned background technology, its measurement accuracy will decrease with the reduction of the measured signal frequency, and the measurement accuracy of the circle measurement method will decrease with the decrease of the frequency of the measured signal. The frequency of the signal to be measured decreases with the increase of the frequency, which has great limitations in practical use

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