Patent ID: 7233205

Claim:
An amplifier comprising: an amplification network including an inductor; and a bias network for accurately setting a bias current in the amplification network independently of a voltage drop across the inductor, wherein the amplification network includes: a first transistor having a control terminal for receiving a positive differential input signal; a second transistor having a control terminal for receiving a negative differential input signal; a third transistor having a control terminal for receiving a positive voltage supply, a first terminal connected to a second terminal of the first transistor, and a second terminal coupled to the positive voltage supply, the second terminal providing a negative differential output signal; a fourth transistor having a control terminal for receiving the positive voltage supply, a first terminal connected to a second terminal of the second transistor, and a second terminal coupled to the positive voltage supply, the second terminal providing a positive differential output signal; a first inductor having a first terminal connected to the first terminals of the first and second transistors and a second terminal connected to a low voltage supply; a first resistor having a first terminal connected to the control terminal of the first transistor, and a second terminal coupled to the low voltage supply, the second terminal receiving a reference current; a second resistor having a first terminal connected to the control terminal of the second transistor, and a second terminal coupled to the low voltage supply, the second terminal receiving the reference current; and a capacitor connected between the second terminals of the first and second resistors and the low voltage supply.