數(shù)字頻率計(jì)是電工電子中常用的測(cè)量?jī)x器,數(shù)字頻率計(jì)通過(guò)用輸入待測(cè)信號(hào)對(duì)一特定長(zhǎng)度的信號(hào)進(jìn)行計(jì)數(shù),從而得出頻率并通過(guò)數(shù)碼管直觀的顯示出來(lái)。本文提出了一種與輸入同步的數(shù)字頻率計(jì)的設(shè)計(jì),提高了頻率計(jì)的精度,設(shè)計(jì)采用multISim軟件進(jìn)行設(shè)計(jì)和仿真的過(guò)程,介紹了其工作原理,硬件電路設(shè)計(jì)和仿真的過(guò)程。設(shè)計(jì)采用了multISim軟件進(jìn)行設(shè)計(jì)和仿真,設(shè)計(jì)結(jié)果得到的驗(yàn)證。Digital frequency counter is used to measure the frequency of a signal.It is common to use a multivibrator to generate a standard 1 second time base signal and count input signal gated by this signal.However,the asynchronous of this time base signal with input signal will bring errors.In this paper,a high precision frequency counter which use synchronized time base signal generator is proposed.This frequency counter is designed and simulated by multISim tools and result is verified.
標(biāo)簽：
multISim
上傳時(shí)間：
2022-05-08
上傳用戶：
為了實(shí)時(shí)檢測(cè)血氧量,能使缺氧特別敏感的腦組織或心臟類疾病患者得到及時(shí)治療,采用近紅外雙波長(zhǎng)透射式光電脈搏血氧測(cè)定法,以H橋電路對(duì)發(fā)射光源進(jìn)行控制及通用運(yùn)算放大器搭建濾波電路。運(yùn)用參數(shù)理論計(jì)算和計(jì)算機(jī)仿真結(jié)果相對(duì)比的方法,通過(guò)Mu ltisim軟件對(duì)所設(shè)計(jì)電路進(jìn)行仿真,仿真結(jié)果與理論參數(shù)計(jì)算相吻合,證明了電路參數(shù)設(shè)計(jì)的可行性,為血氧儀的實(shí)物制作提供參考。For real-time detection of oxygen saturation for timely treatment of the brain or heart,which are very sensitive to oxygen inadequacy,the near-infrared wavelengths double photoelectric pulse oximeter transmission method is adopted.The illuminant is controlled with the H bridge circuit and the filter circuit is built with general op-amps.Parameters by theoretical calculation is compared with the computer simulation results in multISim and satisfactory results are obtained.It is shown that the design of the circuit parameters is feasible and can be a help in making the physical blood-oxygen monitor.
標(biāo)簽：
multISim
光電二極管
濾波器
上傳時(shí)間：
2022-05-12
上傳用戶：
