Title: Radio frequency low noise amplifier with automatic gain control
Application Number: 200580004622 Application Date: 2005.02.02
Publication Number: 1918790 Publication Date: 2007.02.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03G1/00;H03D7/14
Applicant(s) Name: Silicon Lab Inc. Address:
Inventor(s) Name: Krone Andrew W.
Attorney & Agent: chen wei
Abstract:
    A low noise amplifier (500) includes a first transconductance device (326) having a control electrode for receiving a first input signal, and a first current electrode; a first load device (322) having a first terminal coupled to a first power supply voltage terminal and a second terminal coupled to the first current electrode of the first transconductance device (326) and forming a first output voltage signal; a second transconductance device (336) having a control electrode for receiving a second input signal, and a second current electrode; a second load device (332) having a first terminal coupled to the first power supply voltage terminal and a second terminal coupled to the first current electrode of the second transconductance device (336) and forming a second output voltage signal; and an attenuation device (340) coupled between the first current electrodes of the first (326) and second (336) transconductance devices and having a control input terminal for receiving a control voltage thereon.
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