Abstract
This paper presents a high linearity broadband low noise $\mathbf{amplffier}/\mathbf{gain}$ -block MMIC based on shunt feedback and shunt peaking circuit technique. The design targets DC-10 GHz band with excellent noise figure performance. At the input a diode based predistorter is used to further enhance the lineratity of the circuit. A two-stage amplifier is implemented in $\pmb{0.25\mu }\mathbf{m}$ InGaAs E/D-mode pHEMT technology demonstrates a high gain and an excellent bandwidth along with high-linearity. This $\mathbf{amplifier}$ topology seems an attractive choice for applications requiring wide-band, high gain, and high linearity amplification as an alternative to distributed amplifier topologies. Additionally, an excellent noise performance is achieved demonstrating $< \pmb{3.5} \mathbf{dB}$ noise figure in the frequency band of DC-10 GHz. A two-stage amplifier provides $\pmb{20\pm 1.0}\mathbf{dB}$ of small-signal gain with excellent linearity of output IP3 $\geqslant+ \pmb{25.0} \mathbf{dBm}$ while requiring only 90 $\mathbf{mA}$ from $\mathbf{a}\pmb{+5}\mathbf{V}$ supply.
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