Patent ID: 7098739

Claim:
A low noise amplifier comprising: an input to receive an input signal; an output to output an output signal, said output signal being an amplified signal of said input signal; bias circuit connected between a first voltage terminal and a second voltage terminal; an output transistor connected between said first voltage terminal and said second voltage terminal, said output being connected to said output transistor; a bias signal path connected between said bias circuit and a control terminal of said output transistor, said input being connected to said bias signal path; and a high impedance electrical element having both inductance and capacitance located on said bias signal path between said bias circuit and said output transistor, said high impedance electrical element providing noise isolation of said bias circuit from said input to reduce noise in said output signal, wherein said high impedance electrical element includes an inductor and a capacitor that are connected in parallel on said bias signal oath or a grounded transmission line on said bias signal path.