Withrow & Terranova, P.L.L.C.
Ground partitioned power amplifier for stable operation
Achievement of robust stability of a power amplifier (PA) that allows the sharing of the ground between the driver stages and the output stage is shown. A controlled amount of negative feedback is used to neutralize the local positive feedback that results from the driver-to-output stage ground sharing in the signal path, for example, a radio frequency (RF) signal path. The solution keeps a strong drive and a good performance of the PA. Exemplary embodiments are shown for the PA positive feedback neutralization. A first embodiment uses a ground signal divider while another embodiment uses a ground signal divider weighting technique.
RF Micro Devices (Cayman Islands), Ltd.
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inventional inventional additional additional inventional
George Baker Stephen Chu Hsiung
Maxim Scott Franck Ho