Patent Number: 6,798,294

Title: Amplifier with multiple inputs

Abstract: A low noise amplifier (500) is provided for amplifying signals in a frequency band. The low noise amplifier (500) comprises several amplifying elements (505, 506) that share a load impedance (503) and a degeneration impedance (504). One of the amplifying elements (505, 506) is activated at a time that the rest are deactivated. The activation and deactivation is done by feeding a bias to a bias port (501, 507) or grounding the same, respectively. A signal to be amplified is fed to the corresponding input (511, 512) depending on which of the amplifying elements (505, 506) is activated. An amplified signal is obtained at an output (513).

Inventors: Kuiri; Tapio (Oulu, FI)

Assignee: Nokia Corporation

International Classification: H03F 3/20 (20060101); H03F 3/21 (20060101); H03F 003/68 ()

Expiration Date: 09/28/2021