Gain–bandwidth product (original) (raw)
Parlant d'amplificadors operacionals el terme producte de guany-amplada de banda (gain-bandwidth product, GBWP en anglès) és el resultat de multiplicar el guany d'un amplificador en llaç obert i l'amplada de banda.
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| dbo:abstract | Parlant d'amplificadors operacionals el terme producte de guany-amplada de banda (gain-bandwidth product, GBWP en anglès) és el resultat de multiplicar el guany d'un amplificador en llaç obert i l'amplada de banda. (ca) Die Transitfrequenz bezeichnet diejenige Frequenz eines verstärkenden Systems, bei der keine Verstärkung mehr stattfindet, das heißt 0 dB beträgt, und bildet damit die theoretische Obergrenze für einen sinnvollen Einsatz. Der praktische Arbeitsbereich einer Verstärkerschaltung wird jedoch schon wesentlich früher, durch die sogenannte Grenzfrequenz limitiert. (de) The gain–bandwidth product (designated as GBWP, GBW, GBP, or GB) for an amplifier is the product of the amplifier's bandwidth and the gain at which the bandwidth is measured. For devices such as operational amplifiers that are designed to have a simple one-pole frequency response, the gain–bandwidth product is nearly independent of the gain at which it is measured; in such devices the gain–bandwidth product will also be equal to the unity-gain bandwidth of the amplifier (the bandwidth within which the amplifier gain is at least 1).For an amplifier in which negative feedback reduces the gain to below the open-loop gain, the gain–bandwidth product of the closed-loop amplifier will be approximately equal to that of the open-loop amplifier.According to S. Srinivasan, "The parameter characterizing the frequency dependence of the operational amplifier gain is the finite gain–bandwidth product (GB)." (en) GB積（ジービーせき、Gain Band width product、利得帯域幅積）とは、増幅器の特性をあらわす指標のひとつ。増幅器の開ループ利得Aと、利得が半減 (3 dB 減衰) する周波数fcの積であり、単位にはヘルツ [Hz] を用いる。 たとえば、利得が10倍で低域遮断周波数が2 MHzのオペアンプならば となる。 GB積の大きなオペアンプは、より高い周波数帯域まで安定して増幅することができる。 (ja) Il prodotto guadagno-larghezza di banda di un amplificatore operazionale, conosciuto anche come macchina da cucire o semplicemente GBW, è il prodotto tra il modulo del suo guadagno ad anello aperto (il guadagno dell'operazionale senza controllo in retroazione) e la frequenza di taglio a 3dB . È comunemente conosciuto come frequenza di guadagno unitario, o di attraversamento, . Questa quantità, solitamente specificata per ciascun amplificatore, è estremamente importante in quanto, essendo costante a qualsiasi frequenza, permette al progettista di determinare il massimo guadagno ottenibile da uno strumento ad una determinata frequenza e viceversa. Infatti ≈ ∀ . Ad esempio, un A.O. con un GBW di 1 MHz avrà una frequenza di attraversamento di 1 MHz. Lo stesso dispositivo, per ottenere un guadagno 10, dovrà invece lavorare ad una frequenza pari a 100 kHz (1 MHz = 10 x 100 kHz). Infine, per una frequenza 1 Hz, si otterrà un guadagno 106. (it) GBW eller gain-bandwidth product är produkten av bandbredd och förstärkning. GBW är speciellt en operationsförstärkares förmåga att förstärka vid olika frekvenser. En normal operationsförstärkare har en förstärkning runt 100 decibel eller 100 000 gånger. Samtidigt har den en så kallad runt 10Hz vilket alltså är den bandbredd man får om man inte . Motkopplar man emellertid ner förstärkningen så att man inte använder mer än säg 10 gångers förstärkning så har man en bandbredd (-3dB) på 100kHz i detta fallet. Gain-bandwidth product är konstant och är alltså produkten av bandbredd och förstärkning. (sv) 增益带宽积（英語：gain–bandwidth product，缩写：GBWP, GBW, GBP or GB）是指一个放大器带宽以及其相应增益的乘积。 诸如运算放大器等电子器件被设计为具有单极频率响应，增益带宽积几乎与工作点处的增益无关；这些器件的带宽增益积等于一个单位增益带宽。当放大器以负反馈的形式连接在电路中时，整个负反馈网络提供的增益低于开环增益（Open-loop gain）。这时，闭环放大器网络的增益带宽积就近似等于开环放大器网络的增益带宽积。S.斯里尼瓦桑指出：“有限增益带宽积这项参数描述了运算放大器增益对于频率的依赖关系。” (zh) |
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| rdfs:comment | Parlant d'amplificadors operacionals el terme producte de guany-amplada de banda (gain-bandwidth product, GBWP en anglès) és el resultat de multiplicar el guany d'un amplificador en llaç obert i l'amplada de banda. (ca) Die Transitfrequenz bezeichnet diejenige Frequenz eines verstärkenden Systems, bei der keine Verstärkung mehr stattfindet, das heißt 0 dB beträgt, und bildet damit die theoretische Obergrenze für einen sinnvollen Einsatz. Der praktische Arbeitsbereich einer Verstärkerschaltung wird jedoch schon wesentlich früher, durch die sogenannte Grenzfrequenz limitiert. (de) GB積（ジービーせき、Gain Band width product、利得帯域幅積）とは、増幅器の特性をあらわす指標のひとつ。増幅器の開ループ利得Aと、利得が半減 (3 dB 減衰) する周波数fcの積であり、単位にはヘルツ [Hz] を用いる。 たとえば、利得が10倍で低域遮断周波数が2 MHzのオペアンプならば となる。 GB積の大きなオペアンプは、より高い周波数帯域まで安定して増幅することができる。 (ja) GBW eller gain-bandwidth product är produkten av bandbredd och förstärkning. GBW är speciellt en operationsförstärkares förmåga att förstärka vid olika frekvenser. En normal operationsförstärkare har en förstärkning runt 100 decibel eller 100 000 gånger. Samtidigt har den en så kallad runt 10Hz vilket alltså är den bandbredd man får om man inte . Motkopplar man emellertid ner förstärkningen så att man inte använder mer än säg 10 gångers förstärkning så har man en bandbredd (-3dB) på 100kHz i detta fallet. Gain-bandwidth product är konstant och är alltså produkten av bandbredd och förstärkning. (sv) 增益带宽积（英語：gain–bandwidth product，缩写：GBWP, GBW, GBP or GB）是指一个放大器带宽以及其相应增益的乘积。 诸如运算放大器等电子器件被设计为具有单极频率响应，增益带宽积几乎与工作点处的增益无关；这些器件的带宽增益积等于一个单位增益带宽。当放大器以负反馈的形式连接在电路中时，整个负反馈网络提供的增益低于开环增益（Open-loop gain）。这时，闭环放大器网络的增益带宽积就近似等于开环放大器网络的增益带宽积。S.斯里尼瓦桑指出：“有限增益带宽积这项参数描述了运算放大器增益对于频率的依赖关系。” (zh) The gain–bandwidth product (designated as GBWP, GBW, GBP, or GB) for an amplifier is the product of the amplifier's bandwidth and the gain at which the bandwidth is measured. For devices such as operational amplifiers that are designed to have a simple one-pole frequency response, the gain–bandwidth product is nearly independent of the gain at which it is measured; in such devices the gain–bandwidth product will also be equal to the unity-gain bandwidth of the amplifier (the bandwidth within which the amplifier gain is at least 1).For an amplifier in which negative feedback reduces the gain to below the open-loop gain, the gain–bandwidth product of the closed-loop amplifier will be approximately equal to that of the open-loop amplifier.According to S. Srinivasan, "The parameter characteriz (en) Il prodotto guadagno-larghezza di banda di un amplificatore operazionale, conosciuto anche come macchina da cucire o semplicemente GBW, è il prodotto tra il modulo del suo guadagno ad anello aperto (il guadagno dell'operazionale senza controllo in retroazione) e la frequenza di taglio a 3dB . È comunemente conosciuto come frequenza di guadagno unitario, o di attraversamento, . Infatti ≈ ∀ . (it) |
| rdfs:label | Producte de guany-amplada de banda (ca) Transitfrequenz (de) Gain–bandwidth product (en) Prodotto guadagno-larghezza di banda (it) GB積 (ja) Gain-bandwidth product (sv) 增益带宽积 (zh) |
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