abcyin
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Hi,
As the signal from the TX baseband is really large that the active blocks could not bare it, thus the signal should first be attenuated, and the filter after the DAC in the transmitter will also present some attenuation as I see, and the filter is active in most cases, but why not just use some passive RC networks to generate the attenuation? what's the difference between the active filter and the passive RC filter in case only attenuation is required?
Thanks in advance,
abcyin
As the signal from the TX baseband is really large that the active blocks could not bare it, thus the signal should first be attenuated, and the filter after the DAC in the transmitter will also present some attenuation as I see, and the filter is active in most cases, but why not just use some passive RC networks to generate the attenuation? what's the difference between the active filter and the passive RC filter in case only attenuation is required?
Thanks in advance,
abcyin