Invention Application
- Patent Title: Voltage controlled oscillator, frequency synthesizer and communication apparatus
- Patent Title (中): 压控振荡器，频率合成器和通讯装置
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Application No.: US10890998Application Date: 2004-07-15
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Publication No.: US20050059375A1Publication Date: 2005-03-17
- Inventor: Kazuhide Abe , Mayumi Morizuka , Ryoichi Ohara , Kenya Sano , Naoko Yanase , Takaaki Yasumoto , Tadahiro Sasaki , Kazuhiko Itaya , Takashi Kawakubo , Hiroshi Yoshida , Ryuichi Fujimoto , Keiichi Yamaguchi , Nobuyuki Itoh , Tooru Kozu , Takeshi Ookubo
- Applicant: Kazuhide Abe , Mayumi Morizuka , Ryoichi Ohara , Kenya Sano , Naoko Yanase , Takaaki Yasumoto , Tadahiro Sasaki , Kazuhiko Itaya , Takashi Kawakubo , Hiroshi Yoshida , Ryuichi Fujimoto , Keiichi Yamaguchi , Nobuyuki Itoh , Tooru Kozu , Takeshi Ookubo
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee Address: JP Tokyo
- Priority: JP2003-201199 20030724
- Main IPC: H03K3/354
- IPC: H03K3/354 ; H03B1/00 ; H03B5/30 ; H03B5/32 ; H03H9/17 ; H03L7/08 ; H03L7/089 ; H03L7/099 ; H03L7/10 ; H03L7/113 ; H03L7/18 ; H03L7/187 ; H03L7/199 ; H04B1/06 ; H04B7/00 ; H04B17/00
Abstract:
A voltage controlled oscillator includes a resonator configured to resonate with an initial oscillation frequency during starting period of oscillation and a steady oscillation frequency during a steady state oscillation. The resonator includes a film bulk acoustic resonator having a series resonance frequency higher than the steady oscillation frequency. A negative resistance circuit configured to drive the resonator, has a positive increment for reactance in the steady state oscillation compared with reactance in the starting period.
Public/Granted literature
- US07221920B2 Voltage controlled oscillator, frequency synthesizer and communication apparatus Public/Granted day:2007-05-22
Information query
IPC分类:
