該問題由某客戶提出,發(fā)生在 STM32F103VBT6 器件上。據(jù)其工程師講述:在其產(chǎn)品設(shè)計(jì)中,使用了 STM32 的 ADC 掃描按鍵。為了能在低功耗模式下通過按鍵喚醒 STM32,按鍵信號(hào)在送給 ADC 的同時(shí),也送給一路外部中斷,如圖(一)所示。在待機(jī)狀態(tài)下,有按鍵被按下時(shí)外部中斷輸入引腳上的電平會(huì)向下降跳變,從而喚醒 STM32。之后,STM32 通過 ADC 采樣來判斷是哪一個(gè)按鍵被按下,如果是電源鍵,則做開機(jī)處理,否則回到待機(jī)狀態(tài)。在實(shí)測(cè)中,發(fā)現(xiàn)這種情況下對(duì)按鍵的誤判率很高,造成開 機(jī)困難。調(diào)
上傳時(shí)間: 2022-02-22
上傳用戶:jason_vip1
本文目的是演示如何使用STM32F30x 內(nèi)部的DSP 進(jìn)行浮點(diǎn)快速傅立葉變換(FFT),為聯(lián)系實(shí)際應(yīng)用,使用ADC 對(duì)波形發(fā)生器進(jìn)行ADC 采樣,然后對(duì)ADC 采樣結(jié)果進(jìn)行FFT, 與Matlab 仿真結(jié)果進(jìn)行比較察看最終結(jié)果的準(zhǔn)確性。會(huì)使用到ARM的DSP 庫文件,以及STM32F30x 的浮點(diǎn)運(yùn)算單元以及DSP 指令等。
上傳時(shí)間: 2022-02-22
上傳用戶:
STM32F30x 系列的12 位SAR ADC 有很多鮮明的特色性能,比如采樣率可以達(dá)到5 MSPS,可支持差分輸入,等等。但是,由于設(shè)計(jì)的不同,在使用上也有不少不太一樣的地方,我們?cè)谑褂肧TM32F30x 的ADC 外設(shè)的時(shí)候,還是要仔細(xì)了解一些使用的細(xì)節(jié)。
上傳時(shí)間: 2022-02-22
上傳用戶:fliang
基于STM32的ADC仿真OLED顯示,包含源程序和Proteus仿真文件
標(biāo)簽: stm32 adc仿真 oled proteus
上傳時(shí)間: 2022-02-25
上傳用戶:
本文重點(diǎn)介紹利用含有3個(gè)ADC模塊的STM32F4、STM32F7等系列,以滿足多個(gè)ADC模塊同時(shí)工作的需要
上傳時(shí)間: 2022-03-06
上傳用戶:qingfengchizhu
ADC模數(shù)轉(zhuǎn)換器件Altium Designer AD原理圖庫元件庫SV text has been written to file : 4.4 - ADC模數(shù)轉(zhuǎn)換器件.csvLibrary Component Count : 29Name Description----------------------------------------------------------------------------------------------------ADC0800 National 8-Bit Analog to Digital ConverterADC0809 ADC0831 ADCADC0832 ADC8 Generic 8-Bit A/D ConverterCLC532 High-Speed 2:1 Analog MultiplexerCS5511 National 16-Bit Analog to Digital ConverterDAC8 Generic 8-Bit D/A ConverterEL1501 Differential line Driver/ReceiverEL2082 Current-Mode MultiplierEL4083 Current Mode Four Quadrant MultiplierEL4089 DC Restored Video AmplifierEL4094 Video Gain Control/FaderEL4095 Video Gain Contol/Fader/MultiplexerICL7106 LMC6953_NSC PCI Local Bus Power SupervisorMAX4147 300MHz, Low-Power, High-Output-Current, Differential Line DriverMAX4158 350MHz 2-Channel Video Multiplexer-AmplifierMAX4159 350MHz 2-Channel Video Multiplexer-AmplifierMAX4258 250MHz, 2-Channel Video Multiplexer-AmplifierMAX4259 250MHz 2-Channel Video Multiplexer-AmplifierMAX951 Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMAX952 Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMC1496 Balanced Modulator/DemodulatorPLL100k Generic Phase Locked LoopPLL10k Generic Phase Locked LoopPLL5k Generic Phase Locked LoopPLLx Generic Phase Locked Loop水位計(jì)
標(biāo)簽: adc 模數(shù)轉(zhuǎn)換 altium designer
上傳時(shí)間: 2022-03-13
上傳用戶:
STM32F103VET6的ADC采集,并通過串口把采集的數(shù)值實(shí)時(shí)打印在電腦的超級(jí)終端,代碼親測(cè)可用。
標(biāo)簽: stm32f103 adc采集 串口打印
上傳時(shí)間: 2022-03-28
上傳用戶:20125101110
ADC數(shù)字濾波原理
上傳時(shí)間: 2022-03-29
上傳用戶:
這是學(xué)習(xí)sigma delta ADC的很好的一本書籍,供大家學(xué)習(xí)。
標(biāo)簽: adc
上傳時(shí)間: 2022-04-03
上傳用戶:
電學(xué)中的測(cè)量技術(shù)涉及范圍非常廣,電流測(cè)量在電學(xué)計(jì)量中占有非常重要的位置。如何精確地進(jìn)行電流測(cè)量是精密測(cè)量的一大難題。傳統(tǒng)的電流檢測(cè)電路多采用運(yùn)算放大芯片與片外電流檢測(cè)電路相結(jié)合的方式,電路集成度很低,需要較多的接口和資源才能完成對(duì)電路的檢測(cè)。本文把所有電路部分都集成在一塊芯片上,包括檢測(cè)電阻,運(yùn)算放大器電路及模擬轉(zhuǎn)數(shù)字轉(zhuǎn)換電路,從而在電路內(nèi)部可以進(jìn)行電流檢測(cè),使電路更好的集成化。前置電路使用二級(jí)共源共柵結(jié)構(gòu)的運(yùn)算放大器,減小溝道長度調(diào)制效應(yīng)造成的電流誤差。10位SAR ADC中采用電容驅(qū)動(dòng)能力強(qiáng)的傳輸門保證了模數(shù)轉(zhuǎn)化器的有效精度。比較器模塊采用再生鎖存器與遲滯比較器作為基礎(chǔ)單元組合解決精密測(cè)量的問題。本設(shè)計(jì)可以作為嵌入芯片內(nèi)的一小部分而檢測(cè)芯片中的微小電流1mA~100mA,工作電壓在1.8v左右,電流檢測(cè)精度預(yù)期達(dá)到10uA的需求。The measurement technology in electricity involves a wide range,and current measurement plays a very important position in electrical measurement.How to accurately measure current is a big problem in precision measurement. The traditional current detecting circuit adopts the combination of the operational amplifier chip and theoff-chip current detecting circuit, The circuit integration is very low, and more interfaces and resources are needed tocomplete the circuit detection.This topic integrates all the circuit parts into one chip, including detection resistance, operational amplifier circuit andanalog to digital conversion circuit. Highly integrated circuit makes the external resources on the chip more intensive,so that current detection can be carried out inside the circuit, so that the circuit can be better integrated. Thefront-end circuit of this project uses two-stage cascade operational amplifier and cascade tube to reduce the currenterror caused by channel length modulation effect. In 10-bit SAR ADC, the transmission gate with strong capacitivedriving ability ensures the effective accuracy of the analog-to-digital converter. Comparator module uses regenerativelatch and hysteresis comparator as basic unit to solve the difficult problem of precision measurement. This topic can beused as a small part of the embedded chip to detect the micro-current in the chip 1 mA~100 mA, the working voltageis about 1.8v, and the current detection accuracy is expected to reach the requirement of 10 uA.
標(biāo)簽: 電流檢測(cè) 電路 運(yùn)算放大器 adc
上傳時(shí)間: 2022-04-03
上傳用戶:
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