Patent ID: 9608578
Date: 2017-03-28
CPC Classifications: H03F

Claim:
1. A low noise amplifier including: a first T-type circuit adapted to be coupled to a signal source for receiving an input signal therefrom, filtering the input signal to generate a filtered signal, and configured such that an equivalent input impedance seen into said first T-type circuit matches an equivalent output impedance seen into the signal source; a first amplification module coupled to said first T-type circuit for receiving the filtered signal therefrom, and amplifying the filtered signal to generate an amplified signal; and a second amplification module coupled to said first amplification module for receiving the amplified signal therefrom, and amplifying the amplified signal to generate an output signal; said low noise amplifier being characterized in that said second amplification module includes a third T-type circuit coupled to said first amplification module for receiving the amplified signal therefrom, a second transistor having a first terminal, a second terminal that is coupled to ground, and a control terminal that is coupled to said third T-type circuit, an eighth inductor having a first terminal, and a second terminal that is coupled to said first terminal of said second transistor, a third transistor having a first terminal, a second terminal that is coupled to said first terminal of said eighth inductor, and a control terminal, a ninth inductor having a first terminal that is coupled to said control terminal of said third transistor, and a second terminal that is adapted to receive a third voltage, and a fourth T-type circuit coupled to said first terminal of said third transistor, and outputting the output signal.