Title:
デブースト電流経路を有するマルチ線形性モードLNA
Document Type and Number:
Japanese Patent JP2011509048
Kind Code:
A
Abstract:
A modified derivative superposition (MDS) low noise amplifier (LNA) includes a main current path and a cancel current path. Third-order distortion in the cancel path is used to cancel third-order distortion in the main path. In one novel aspect, there is a separate source degeneration inductor for each of the two current paths, thereby facilitating tuning of one current path without affecting the other current path. In a second novel aspect, a deboost current path is provided that does not pass through the LNA load. The deboost current allows negative feedback to be increased without generating headroom problems. In a third novel aspect, the cancel current path and/or deboost current path is programmably disabled to reduce power consumption and improve noise figure in operational modes that do not require high linearity.
Inventors:
Chang, Lee Chun
Application Number:
JP2010541506A
Publication Date:
March 17, 2011
Filing Date:
December 27, 2008
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H03F1/32; H03F3/193
Domestic Patent References:
| JP2007053734A | 2007-03-01 | |||
| JP2006180492A | 2006-07-06 | |||
| JP2007053762A | 2007-03-01 | |||
| JP2007053734A | 2007-03-01 |
Other References:
JPN6013008673; ２００４ ＩＥＥＥ ＲＦＩＣ , ｐ１０５-１０８
JPN6013008675; ＩＥＥＥ Ｔｒａｎｓａｃｔｉｏｎｓ ｏｎ Ｍｉｃｒｏｗａｖｅ Ｔｈｅｏｒｙ ａｎｄ Ｔｅｃｈｎｉｑｕｅｓ Ｖｏｌ．５３ Ｎｏ．２, ｐ５７１-５８１
JPN6013008678; ＩＥＥＥ Ｔｒａｎｓａｃｔｉｏｎｓ ｏｎ Ｍｉｃｒｏｗａｖｅ Ｔｈｅｏｒｙ ａｎｄ Ｔｅｃｈｎｉｑｕｅｓ Ｖｏｌ．５４ Ｎｏ．１２, ｐ４０７９-４０８５
JPN6013008675; ＩＥＥＥ Ｔｒａｎｓａｃｔｉｏｎｓ ｏｎ Ｍｉｃｒｏｗａｖｅ Ｔｈｅｏｒｙ ａｎｄ Ｔｅｃｈｎｉｑｕｅｓ Ｖｏｌ．５３ Ｎｏ．２, ｐ５７１-５８１
JPN6013008678; ＩＥＥＥ Ｔｒａｎｓａｃｔｉｏｎｓ ｏｎ Ｍｉｃｒｏｗａｖｅ Ｔｈｅｏｒｙ ａｎｄ Ｔｅｃｈｎｉｑｕｅｓ Ｖｏｌ．５４ Ｎｏ．１２, ｐ４０７９-４０８５
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen