EMERSON DXA-480
EMERSON DXA-480
欠采樣
欠采樣技術(shù)中，ADC采樣率低于模擬輸入頻率，該條件下將引起混疊。根據(jù)奈奎斯特定理，自然知道欠采樣將丟失信號(hào)信息。然而，如果對(duì)輸入信號(hào)進(jìn)行正確濾波，以及正確選擇模擬輸入和采樣頻率，則可將包含信號(hào)信息的混疊成分從較高頻率搬移至較低頻率，然后進(jìn)行轉(zhuǎn)換。該方法有效地將ADC用作下變頻器，將較高帶寬信號(hào)搬移到ADC的有效帶寬。要想該技術(shù)取得成功，ADC跟蹤-保持電路的帶寬必須能夠處理預(yù)期的zui高頻率信號(hào)。
單極性
對(duì)于單端模擬輸入ADC，單極性信號(hào)輸入范圍為零幅（通常為地）至滿幅（通常為基準(zhǔn)電壓）；對(duì)于差分輸入ADC，信號(hào)輸入范圍為零幅至滿幅，以正輸入相當(dāng)于負(fù)輸入測(cè)量輸入范圍。
零幅誤差
參見(jiàn)失調(diào)誤差（單極性）。
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惠顧！
從事（DCS系統(tǒng)）（機(jī)器人系統(tǒng)）（大型伺服控制系統(tǒng)）模塊 備
件銷(xiāo)售,公司主營(yíng)（優(yōu)勢(shì)）產(chǎn)品內(nèi)
容為分布式控制系統(tǒng)(DCS) ,可編程序控制器(PLC)， MOTOROLA
MVME工業(yè)用模組 ，工業(yè)控制通訊
轉(zhuǎn)換器(Anybus) ，遠(yuǎn)端輸出/輸入模塊(RTU) ，工業(yè)電腦(IPC)
、 工業(yè)用低頻螢?zāi)?IPC) ，人機(jī)
界面SCSI(50,68,80Pin) AnyBus(Gateway)備件銷(xiāo)售
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