Invention Grant
- Patent Title: Automatic gain control circuit and low noise amplifying circuit
- Patent Title (中): 自动增益控制电路和低噪声放大电路
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Application No.: US12298370Application Date: 2006-11-29
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Publication No.: US07795979B2Publication Date: 2010-09-14
- Inventor: Kazuhisa Ishiguro
- Applicant: Kazuhisa Ishiguro
- Applicant Address: JP Tokyo
- Assignee: Ricoh Co., Ltd.
- Current Assignee: Ricoh Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Connolly Bove Lodge & Hutz LLP
- Agent Arlene P. Neal
- Priority: JP2006-118745 20060424
- International Application: PCT/JP2006/324303 WO 20061129
- International Announcement: WO2007/122771 WO 20071101
- Main IPC: H03G3/10
- IPC: H03G3/10
Abstract:
By connecting an antenna damping circuit (4) and a bypass switch (5) in series and connecting the series circuit and an LNA (3) in parallel, it is possible to inhibit a generation of a signal path for connecting the bypass switch (5) to the LNA (3) in series in an operation of the LNA (3) and to prevent a noise factor of the LNA (3) from being deteriorated due to an on resistance of the bypass switch (5).
Public/Granted literature
- US20090096527A1 AUTOMATIC GAIN CONTROL CIRCUIT AND LOW NOISE AMPLIFYING CIRCUIT Public/Granted day:2009-04-16
Information query
