最新數(shù)字頻率計(jì)設(shè)計(jì)與制作-展示頁(yè)
2025-07-09 02:39本頁(yè)面
【正文】 。數(shù)字頻率計(jì)設(shè)計(jì)與制作王峰, 電子工程系摘 要:數(shù)字頻率計(jì)是一種可以用十進(jìn)制數(shù)字顯示被測(cè)信號(hào)頻率的測(cè)量?jī)x器。被測(cè)信號(hào)可以是任何周期性變化的信號(hào)如正弦波、方波、三角波等等。使用頻率計(jì)能讓我們直觀的看到信號(hào)的頻率，其方便性、簡(jiǎn)單性、準(zhǔn)確性使其具有較高的實(shí)用價(jià)值。對(duì)于本次課題“數(shù)字頻率計(jì)設(shè)計(jì)與制作”,我選用了555定時(shí)器產(chǎn)生時(shí)基信號(hào)，單穩(wěn)態(tài)觸發(fā)器74LS273來(lái)控制電路中的鎖存，計(jì)數(shù)器74LS90來(lái)計(jì)數(shù)，74LS48進(jìn)行譯碼并通過(guò)數(shù)碼管顯示。關(guān)鍵詞：數(shù)字頻率計(jì)；鎖存 ；譯碼；計(jì)數(shù)Digital Frequency Meter Design and FabricationWangfeng, Electronic Information EngineeringAbstract: Digital Frequency Meter is a measuring device, it can using decimal numeral reveal the signal frequency. The measured signal was variety seasonal signal, such as sinusoidal wave, square wave, triangle wave and so on. If we using amplify circuit, we can also use sensing element measuring so many faint and regular signals,for example voice, inflexible vibrate and rotation rate. Digital Frequency Meter can make us intuitively sight the signal frequency, it’s conveniently, simply and accuracy,so it has enormously worthy in many fields, include puter, munication apparatus, automation equipment and so about this subject study, the Digital Frequency Meter Design and Fabrication,I select 555_timer produce a normal time signal, using Monostable Trigger 74LS273 constitute fliplatch, using counter flipflop 74LS90 count, using 74LS48 constitute a code translator and usig Mixie light reveal frequency. Apply digital integrated circuit chip help me save so many time and reduce a number of inconvenience.Key
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