TRANSMITTER - MATSUSHITA ELECTRIC IND CO LTD

Title:

TRANSMITTER

Document Type and Number:

Japanese Patent JP2005167541

Kind Code:

A

Abstract:

To provide a method for correcting temperature characteristics without any deterioration in spectrum.

An amplitude constituent and a phase constituent in a modulation signal are inputted to a high-frequency input terminal and a power supply terminal in a high-frequency power amplifier 305, respectively, and a modulated wave from the output of the high-frequency power amplifier 305 is obtained. The output of the high-frequency power amplifier 305 is detected at an output detection section 309, correction data to a detection voltage that is the closest to the detection voltage in a correction data table 311 measured by various temperature environments in advance for storage are selected by a selector 310, and the amplitude and phase constituents are corrected by a phase amplitude correction means 303, thus achieving EER operation without any spectrum deterioration.

Inventors:

TANABE MITSURU
TANAKA KOICHIRO

Application Number:

JP2003402615A

Publication Date:

June 23, 2005

Filing Date:

December 02, 2003

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MATSUSHITA ELECTRIC IND CO LTD

International Classes:

H01Q11/12; H03F1/30; H03F1/32; H03F3/24; H04B1/04; H04L27/20; H04L27/36; (IPC1-7): H04B1/04; H03F1/32; H03F3/24

Attorney, Agent or Firm:

Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito

Previous Patent: NETWORK LINKING APPARATUS AND METHOD THEREOF

Next Patent: DIGITAL CELLULAR PHONE SYSTEM AND PORTABLE TELEPHONE USED THEREFOR