High-linearity low-noise amplifier, chip, and electronic device

A high-linearity low-noise amplifier, comprising a primary-stage amplification unit, at least one secondary-stage amplification unit, a drive unit, a configurable load unit, an input impedance matching unit and an output impedance matching unit, and further comprising a switched capacitor branch, wherein

• an input end of the low-noise amplifier is connected with an input end of the primary-stage amplification unit through the input impedance matching unit, an output end of the primary-stage amplification unit is connected with an input end of the drive unit, and an output end of the drive unit is connected with an output end of the low-noise amplifier through the output impedance matching unit;
• the input end of the primary-stage amplification unit is provided with a first bias voltage;
• an input end of the at least one secondary-stage amplification unit is connected with the input end of the primary-stage amplification unit through the switched capacitor branch;
• and the input end of the secondary-stage amplification unit is provided with a second bias voltage, and input ends of other secondary-stage amplification units are directly connected with the input end of the primary-stage amplification unit.