The net result of paralleling N input stages is that they output current of N(VINP–VINN)/(2R1), or N times that of a single IC. You use only one of the current-to-voltage stages of the N ICs. That stage’s feedback resistor has the value of R2/N, where R2 is the value for a desired voltage gain of AV in a single IC. Because the primary source of noise in an amplifying IC is its input stage, you can assume that the standard deviation of the random component of output current of the paralleled-N voltage-to-current converters is σNI=σI×, where σI is the standard deviation of the random component of output current of a voltage-to-current converter. These results differ from those in Reference 2, in which the authors perform noise reduction by averaging multiple voltages. On the other hand, the deterministic part of current at the common output of the voltage-to-current converters in Figure 1 has the value of N times that of the single IC. The following equation calculates the RSNR (relative signal-to-noise ratio),
which you define as the output current over the standard deviation of output noise: RSNRN=(N×I)/(σI×)=×RSNR1. It means that, in effect, the noise of the circuit has decreased to a fraction of 1/ compared with that of a single IC. References “AD8553 1.8V to 5V Auto-Zero, In-Amp with Shutdown,” Analog Devices, 2005. Štofka, Marián, “Paralleling decreases autozero-amplifier noise by a factor of two,” EDN, June 7, 2007, pg 94.
三相整流后的滤波电感如何计算最近做一个技术方案，电源三相380V输入三相桥式整流后通过移相全桥电路输出30V,请教以下各位高手在三相桥式整流后和移相全桥之间的滤波电感该如何计算，谢谢！我知道这电感为了防 新能源车载 熔断器车载三合一控制器，电池PACK熔断器，第三方测试报告齐全，UL证书产品，安全可靠，需要请联系 13631564479 }Q3UMV_8A3W$1C$)UL79Z2G.jpg(16.69 KB, 下载 单火线到底要不要过EMI测试？请问大家，单火线到底要不要过EMI测试？有什么标准吗？
这个要看客户要求吧。
有没有标准，大部分客户没有EMI测试的要求，也有客户在问这个问题？
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