Title:
【発明の名称】光活性スイッチを備えた線形RF電力増幅器
Document Type and Number:
Japanese Patent JP2001522187
Kind Code:
A
Abstract:
A linear power amplifier amplifies a linear baseband signal having I and Q components. An up-converting mixer uses optically activated switches to mix the amplified baseband signal with a local oscillator signal at specified carrier frequency. The optically activated switches are activated according to a switching sequence that produces a constant impedance over each carrier frequency cycle. In this way, the optically activated switches prevents introduction of non-linearities during the up-conversion process.
Inventors:
Helberg, Richard
Application Number:
JP2000519506A
Publication Date:
November 13, 2001
Filing Date:
October 16, 1998
Export Citation:
Assignee:
Telefon Acty Bora Get Elm Ericsson (Pubble)
International Classes:
H03D7/00; H03D7/16; H03F1/32; H03F3/24; H04L27/36; (IPC1-7): H03D7/00
Attorney, Agent or Firm:
Yasunori Otsuka (1 person outside)