Title:
スイッチモードRF増幅器の可変バイアス制御方法
Document Type and Number:
Japanese Patent JP4197123
Kind Code:
B2
Abstract:
The present invention, generally speaking, provides for the effective use of dynamic bias control in a switch-mode RF amplifier to achieve an output signal having wide dynamic range. In one aspect, a method is provided of amplifying an RF signal to produce a variable output signal using an amplifier including a final amplification stage having a control terminal. The method includes: applying to the control terminal of the final amplification stage a drive signal and a bias signal; and varying the bias signal as a function of a desired output power of the variable output signal. The drive signal and the bias signal together cause the final amplification stage to be driven repeatedly between two states, a hard-on state and a hard-off state, without operating in a linear operating region for an appreciable percentage of time, and the final amplification stage is controlled without continuous or frequent measurement and feedback adjustment of the variable output signal.
Inventors:
Earl W McCune Jr.
Application Number:
JP2002533470A
Publication Date:
December 17, 2008
Filing Date:
October 09, 2001
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H03F3/193; H03F1/02; H03F1/32; H03F3/217
Domestic Patent References:
| JP10341116A | ||||
| JP11145853A | ||||
| JP5299944A | ||||
| JP10256843A | ||||
| JP4277909A | ||||
| JP2001007653A | ||||
| JP2001284998A | ||||
| JP6507774A | ||||
| JP2000151317A |
Attorney, Agent or Firm:
Shiro Ogasawara