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The recovery time of an amplifier is the time it takes to return from a saturated signal, to steady state gain. This is a normal requirement for Radar front ends. Noise Figure recovery is generally less of a consideration, as low level returns will be significantly delayed after the transmit pulse. This may be more of a problem for physics experiments where impulse generated signals are to be examined.
Amplifiers, when strongly compressed, can have significant internal bias changes. Depending upon the bias circuit time constant, they can have a slowed recovery. Generally all our FET amplifiers recover within 1 uS and most recover in the low nS range. Measuring these effects may be necessary depending upon the requirement.
Bipolar amplifiers are problematic in recovery time and the bipolar amplifiers listed under this category are specifically designed for fast recovery. |