A High Linearity Bias Circuit Applied to RF Amplifier
A radio frequency amplifier, bias circuit technology, applied in the direction of improving amplifiers to reduce nonlinear distortion, amplifiers, and components of amplifying devices, etc. The effect of small influence on other performance, small resistance parasitic parameters, and fast response speed
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[0046] This embodiment provides a highly linear bias circuit applied to radio frequency amplifiers, the main function is to provide a bias voltage for the radio frequency amplifier transistor in the radio frequency amplifier, and at the same time automatically adjust the bias voltage according to the size of the input and output radio frequency signals size to improve the linearity of the RF amplifier.
[0047] figure 1 Shown is a schematic diagram of the topological structure of a single-stage radio frequency amplifier. This embodiment mainly corresponds to the high linearity bias circuit 1 in the schematic diagram of the topology structure. As shown in the figure, the high linearity bias circuit 1 collects and outputs a radio frequency signal RFfeedback that matches 3, and then After internal processing, the bias voltage signal V BIAS , is commonly connected with the input match 2 control transistor M 0 The gate of the control transistor M 0 The DC working state of the tr...
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