Patent ID: 7489192

Claim:
A low noise amplifier (LNA) comprising: first and second power supply terminals; a first transistor having first and second terminals and a control terminal, the conduction between first and second terminals being controlled by the voltage between the first terminal and the control terminal, the first transistor having its control terminal coupled as an LNA input; a first inductor coupled between the first terminal of the first transistor and the first power supply terminal; a second inductor coupled between the second terminal of the first transistor and the second power supply terminal, the first and second inductors having a first magnetic coupling; a compensation circuit coupled to the second terminal of the first transistor, the compensation circuit having a second magnetic coupling to the first inductor and a third magnetic coupling to the second inductor; an output of the LNA being coupled to the second terminal of the first transistor; the magnetic coupling providing both a positive feedback and a negative feedback that do not cancel each other.