dcr – -Translation – Keybot Dictionary

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Glossary Term: DCR
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電気/電子用語：DCR
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术语表：DCR
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Maxim > Glossary of EE Terms > DCR
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マキシム > 電気/電子用語集 > DCR
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Maxim > 电子工程术语表 > DCR
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Glossary Definition for DCR
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電気/電子用語の定義：DCR
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An RTP timestamp provides a 32-bit value that is used by the DCR technique and indicates the relative timing between successively transmitted packets. The RTP timestamp also indicates when a packet is transmitted.
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TDM PW定时是一个抽象术语，意思是PW为原始T1/E1承载定时信息。复杂的DSP算法用于在远端PW端点复现/恢复TDM定时。可通过监测接收到的数据包速率(例如采用ACR)或监测每个数据包中包含的RTP时标(例如采用DCR)恢复定时。有些应用不采用PW时钟恢复，而代之以使用本地接收T1/E1定时(环路定时)或使用本地系统时钟(系统定时)。
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The clock recovery algorithm in DCR uses real-time transport protocol (RTP) timestamps. The sending side uses a high-accuracy clock to generate timestamps that identify when each packet is transmitted.
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For a T1/E1 Line, OAM generally means T1/E1 alarms, performance monitoring (PM), and loopback that are communicated with the T1/E1 framing pattern. PW alarm OAM is communicated using the L-bit and R-bit in each PW packet header. The TDMoP device also enables an external CPU to send and receive virtual circuit connectivity verification (VCCV) and Metro Ethernet Forum (MEF) OAM message/packets at the Ethernet interface. These message/packets are independent of the TDM PW packets. PW VCCV OAM can be used for functions like PW connection setup, PM, and maintenance. MEF OAM is an Ethernet protocol that can include IEEE® 802.1ag and other specialized Ethernet OAM functions (e.g., connection continuity checking).
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The clock recovery algorithm in DCR uses real-time transport protocol (RTP) timestamps. The sending side uses a high-accuracy clock to generate timestamps that identify when each packet is transmitted.
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For a T1/E1 Line, OAM generally means T1/E1 alarms, performance monitoring (PM), and loopback that are communicated with the T1/E1 framing pattern. PW alarm OAM is communicated using the L-bit and R-bit in each PW packet header. The TDMoP device also enables an external CPU to send and receive virtual circuit connectivity verification (VCCV) and Metro Ethernet Forum (MEF) OAM message/packets at the Ethernet interface. These message/packets are independent of the TDM PW packets. PW VCCV OAM can be used for functions like PW connection setup, PM, and maintenance. MEF OAM is an Ethernet protocol that can include IEEE® 802.1ag and other specialized Ethernet OAM functions (e.g., connection continuity checking).
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The clock recovery algorithm in DCR uses real-time transport protocol (RTP) timestamps. The sending side uses a high-accuracy clock to generate timestamps that identify when each packet is transmitted.
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For a T1/E1 Line, OAM generally means T1/E1 alarms, performance monitoring (PM), and loopback that are communicated with the T1/E1 framing pattern. PW alarm OAM is communicated using the L-bit and R-bit in each PW packet header. The TDMoP device also enables an external CPU to send and receive virtual circuit connectivity verification (VCCV) and Metro Ethernet Forum (MEF) OAM message/packets at the Ethernet interface. These message/packets are independent of the TDM PW packets. PW VCCV OAM can be used for functions like PW connection setup, PM, and maintenance. MEF OAM is an Ethernet protocol that can include IEEE® 802.1ag and other specialized Ethernet OAM functions (e.g., connection continuity checking).
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The other important parameter for inductor selection is the DC series resistance (DCR). Designers are always faced with a trade-off of inductor size versus efficiency, as the DCR represents a source of power loss.
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インダクタ選択のもう1つの重要なパラメータは、DC直列抵抗(DCR)です。DCRは電力損失の源であるため、設計者は常にインダクタのサイズと効率のトレードオフに直面します。もう1つの考慮すべき電力損失は、コア損失です。インダクタの電流定格には、連続(IRMS)とピーク(ISAT (A))の2つがあります。IRMSは、通常は40℃のインダクタ温度上昇を生成するDC電流として規定されます。ISAT (A)は、インダクタンスの特定のロールオフを生成するピーク電流です(ロールオフはオープン回路の値からの低下率として規定され、5%～50%の場合があります)。参考文献の節に含まれている｢Estimate Inductor Losses Easily in Power Supply Designs｣1という題名の記事は、インダクタの電力損失を理解するための参考書として非常に役立ちます。非常に便利な無料の、オンラインのインダクタ設計ツールが多数あります。インダクタ選択のための優れたオンラインツールの1つにVishayのものがあり、同社のウェブサイト2で提供されています。このツールは、インダクタのすべての電力損失を計算します。図1は、そのツールの結果で、上記の例に基づいています。Coilcraft3,4も、ユーザーによるインダクタ値の選択と電力損失の計算に役立つオンラインのツールを提供しています。
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The other important parameter for inductor selection is the DC series resistance (DCR). Designers are always faced with a trade-off of inductor size versus efficiency, as the DCR represents a source of power loss.
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インダクタ選択のもう1つの重要なパラメータは、DC直列抵抗(DCR)です。DCRは電力損失の源であるため、設計者は常にインダクタのサイズと効率のトレードオフに直面します。もう1つの考慮すべき電力損失は、コア損失です。インダクタの電流定格には、連続(IRMS)とピーク(ISAT (A))の2つがあります。IRMSは、通常は40℃のインダクタ温度上昇を生成するDC電流として規定されます。ISAT (A)は、インダクタンスの特定のロールオフを生成するピーク電流です(ロールオフはオープン回路の値からの低下率として規定され、5%～50%の場合があります)。参考文献の節に含まれている｢Estimate Inductor Losses Easily in Power Supply Designs｣1という題名の記事は、インダクタの電力損失を理解するための参考書として非常に役立ちます。非常に便利な無料の、オンラインのインダクタ設計ツールが多数あります。インダクタ選択のための優れたオンラインツールの1つにVishayのものがあり、同社のウェブサイト2で提供されています。このツールは、インダクタのすべての電力損失を計算します。図1は、そのツールの結果で、上記の例に基づいています。Coilcraft3,4も、ユーザーによるインダクタ値の選択と電力損失の計算に役立つオンラインのツールを提供しています。