Patent ID: 7081796

Claim:
A low noise amplifier comprising: a first transconductance device having a control electrode for receiving a first input signal, and a first current electrode; a first load device having a first terminal coupled to a first power supply voltage terminal and a second terminal coupled to said first current electrode of said first transconductance device and forming a first output voltage signal thereon; a second transconductance device having a control electrode for receiving a second input signal, and a first current electrode; a second load device having a first terminal coupled to said first power supply voltage terminal and a second terminal coupled to said first current electrode of said second transconductance device and forming a second output voltage signal thereon; and an attenuation device coupled between said first current electrode of said first transconductance device and said first current electrode of said second transconductance device, and having a control input terminal for receiving a control voltage thereon; wherein said attenuation device comprises a plurality of exponentially-weighted attenuation devices.