The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
Jan. 08, 2004
Dow-chih Niu, Taipei, TW;
Chia-yang Chen, Hsinchu, TW;
Dow-Chih Niu, Taipei, TW;
Chia-Yang Chen, Hsinchu, TW;
Chung-Shan Institute of Science and Technology, Taoyuan, TW;
Abstract
A single-power-supply Idss-bias RF amplifier is disclosed, which is composed by the first and second stages Amplifiers. The two stages have the same circuit topology except matching circuits. The source terminal of amplifier is grounded directly to reduce a parasitic effect from a bias circuit. It will increase the stability of the RF amplifier and avoid an oscillation. The lossy matching circuits and eliminating resonator circuit are designed to make the RF amplifier unconditional stable. A variable resister is put into to adjust a D.C. voltage on the drain terminal. The current of amplifier could be controlled in a reasonable range. High gain and quit low noise have been obtained.