Title:
隣接および次隣接チャネル電力制御の負荷調整を行う電力増幅回路
Document Type and Number:
Japanese Patent JP4611496
Kind Code:
B2
Abstract:
A power amplifying circuit with load adjust for control of adjacent and alternate channel power. A power amplifier amplifies an input signal to produce an amplified signal. A variable impedance network presents different impedances to the output of the power amplifier responsive to a load control signal. A peak-to-average detector provides an indication of a peak-to-average ratio of the amplified signal. A controller coupled to the peak-to-average detector and the variable impedance network produces the load control signal responsive to the indication of the peak-to-average ratio.
Inventors:
Armin Cromsdorf
William Albers
Luke Winkleman
William Albers
Luke Winkleman
Application Number:
JP2000206604A
Publication Date:
January 12, 2011
Filing Date:
July 07, 2000
Export Citation:
Assignee:
MOTOROLA INCORPORATED
International Classes:
H03F1/02; H03F1/32; H03F3/24; H03F3/20; H03G3/20; H04B1/04
Domestic Patent References:
| JP6204959A | ||||
| JP11220338A | ||||
| JP2000004173A | ||||
| JP7046064A | ||||
| JP7240638A |
Attorney, Agent or Firm:
Atsushi Honda
Miho Ikegami
Yoshiaki Ikeuchi
Shinsuke Onuki
Naoki Fujimura
Miho Ikegami
Yoshiaki Ikeuchi
Shinsuke Onuki
Naoki Fujimura