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Figure 1: Effect on overall gain response of negative gain slope of three amplifiers cascaded in a receiver chain.
Amplifiers

Positive Gain Slope Amplifiers Compensate for Gain Roll-Off in Wideband Systems

Meeting gain roll-off and gain flatness requirements over frequency is a common problem in many modern-day discrete RF transceivers. Ideally, the gain in the signal path of an RF transceiver should be flat over frequency in the band of interest. However, each component in the RF line-up has a finite bandwidth, which can cause the overall system gain response to roll-off over frequency. This is seen as negative slope in a graph of gain versus frequency. This behavior makes meeting gain flatness specifications for these transceivers very challenging to achieve, particularly over wide bandwidths.

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