SPS receiver with adjustable linearity

摘要

A device includes a low noise amplifier (LNA) for amplifying an input signal, with the LNA including a first transistor configured to receive the input signal, a second transistor configured to receive a bias current and forming a current mirror for the first transistor, and an operational amplifier (op amp) operative to generate a bias voltage for the first and second transistors to match operating points of the first and second transistors.

主权项

1. A device including a low noise amplifier (LNA) for amplifying an input signal, the LNA comprising:
a first transistor configured to receive the input signal, a second transistor configured to receive a bias current and forming a current mirror for the first transistor, and an operational amplifier (op amp) operative to generate a bias voltage for the first transistor and for the second transistor to match operating points of the first and second transistors, wherein the op amp is configured to receive a first voltage and a second voltage at inverting and non-inverting inputs, respectively, and to generate the bias voltage based on the first voltage and the second voltage, the first voltage being a replicated output voltage of the first transistor, and the second voltage being an output voltage of the second transistor.