Calculadora de Largura de Banda do Amplificador Operacional
Calcule a largura de banda de um amplificador operacional com base no produto ganho-banda.
Closed-Loop Bandwidth
100.0 kHz
Closed-Loop Bandwidth vs Gain-Bandwidth Product
Formula
## Op-Amp Gain-Bandwidth Product ### Formula **BW = GBW / A_CL** Where GBW is the gain-bandwidth product and A_CL is the closed-loop gain. Higher gain means lower bandwidth. This is a fundamental trade-off in op-amp circuits.
Exemplo Resolvido
An op-amp with GBW = 1 MHz set to a gain of 10.
- 01BW = 1 MHz / 10 = 100 kHz
- 02BW in Hz = 1,000,000 / 10 = 100,000 Hz
- 03Gain in dB = 20 x log10(10) = 20 dB
Perguntas Frequentes
What is gain-bandwidth product?
A constant for each op-amp: the product of open-loop gain and frequency at the -3 dB point. Typical values range from 1 MHz to over 1 GHz.
Does this apply to inverting and non-inverting?
For both, use the noise gain: (1 + Rf/R1) for non-inverting, (1 + Rf/Rin) for inverting.
How do I get more bandwidth at high gain?
Choose an op-amp with higher GBW, or cascade lower-gain stages to achieve the desired total gain.
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