Title:
温度安定化された電圧制御発振器
Document Type and Number:
Japanese Patent JP5329082
Kind Code:
B2
Abstract:
A Voltage Controlled Oscillator (VCO) in a battery-powered device, such as a cellular phone, can be configured to tune across a fairly wide frequency range using a relatively narrow control voltage range. The frequency response of the VCO can be temperature compensated by applying a temperature variable voltage source to varactors that form part of a VCO resonant circuit. The reference end of the varactor can be supplied with a temperature dependent voltage source that has a temperature dependence that substantially compensates for varactor temperature dependence. The temperature dependent voltage source can be a Proportional To Absolute Temperature (PTAT) device.
Inventors:
Aparin, Vladimir
U, Yue
U, Yue
Application Number:
JP2007506232A
Publication Date:
October 30, 2013
Filing Date:
March 21, 2005
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H03B5/04; H03B5/08; H03B5/12; H03L1/02; H03L7/099
Domestic Patent References:
| JP2001313527A | ||||
| JP5505068A | ||||
| JP56146308A | ||||
| JP2002290151A | ||||
| JP22721A | ||||
| JP200456720A | ||||
| JP63107311A | ||||
| JP2001156545A | ||||
| JP536930U |
Foreign References:
| WO2002065639A1 | ||||
| US6225871 |
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