
282 HYBRID AND MONOLITHIC MICROWAVE INTEGRATED CIRCUIT AMPLIFIERS
A lesson to be learned from this example is that the noise figure of the first stage in
the cascade chain dominates the noise figure of the combination of stages. Note
that the overall noise figure increased only a small amount when a second ampli-
fier was used.
14-9 MINI-CIRCUITS MAR-X SERIES DEVICES: A MIC EXAMPLE
The Mini-Circuits Laboratories, Inc. MAR-x series of MIC devices offers gains from
+13 dB to +20 dB and top-end frequency response of either I or 2 GHz, depending
on type. The package used for the MAR-x device (Fig. 14-3A) is similar to the case