Title:
【発明の名称】広帯域包絡線信号を効率的に増幅する装置と方法
Document Type and Number:
Japanese Patent JP2003533116
Kind Code:
A
Abstract:
Systems and methods for amplifying an RF input signal include employing a moderately power efficient wide bandwidth device, such as an AB-type amplifier, to amplify the power residing in the high frequency components of the input signal, and a highly power efficient narrow bandwidth device, such as a synchronous buck DC/DC converter, to amplify the power residing in the low frequency components of the input signal. The amplified low frequency components and high frequency components are then combined to produce an amplified replica of the RF input signal. A positive feedback loop is provided between the output of the AB-type amplifier and the input of the DC/DC converter to provide stability to the amplified RF signal. A negative feedback loop is provided between the output of the DC/DC converter and the input of the AB-type amplifier to minimize interference introduced by the DC/DC converter.
Inventors:
Mate, Renato
Kimball, Don
Archan Vault, Joe
Hailey, Walter
Kimball, Don
Archan Vault, Joe
Hailey, Walter
Application Number:
JP2001582908A
Publication Date:
November 05, 2003
Filing Date:
April 30, 2001
Export Citation:
Assignee:
Telefon Acty Boraget Elm Ericson (Pubble)
International Classes:
H03F1/34; H03F1/02; H03F1/48; H03F3/21; H03F3/217; (IPC1-7): H03F3/21; H03F1/02; H03F1/34; H03F1/48
Domestic Patent References:
| JPH04271506A | 1992-09-28 | |||
| JPH10256843A | 1998-09-25 | |||
| JPH06303049A | 1994-10-28 | |||
| JPH04119707A | 1992-04-21 | |||
| JPH10242779A | 1998-09-11 |
Foreign References:
| US5905407A | 1999-05-18 | |||
| WO1999018663A1 | 1999-04-15 |
Attorney, Agent or Firm:
Akira Asamura (3 outside)