Title:
LOW NOISE TRANSMITTER
Document Type and Number:
Japanese Patent JP2003218708
Kind Code:
A
Abstract:
To provide a low-noise transmitter usable for various high frequency types of radio apparatuses, communication apparatuses, measuring instruments, etc.
A distortion compensator 102 having a lookup table is used for compensating distortions produced from an orthogonal modulator 106. By allowing the modulator 106 to be set to a high output level and a medium power amplifier to be omitted, there a BPF 109 in the latter stage for reducing receiving band noise is simplified. Thus a low-noise transmitter is obtained with a simple configuration as a whole.
Inventors:
SAITO NORIAKI
SHIMIZU KATSUTO
MIMURA MASAHIRO
YABUKI HIROYUKI
SHIMIZU KATSUTO
MIMURA MASAHIRO
YABUKI HIROYUKI
Application Number:
JP2002012538A
Publication Date:
July 31, 2003
Filing Date:
January 22, 2002
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H04B1/04; (IPC1-7): H04B1/04
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)
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