发明授权
US06727771B2 Semiconductor integrated circuit device with variable gain amplifier
有权
具有可变增益放大器的半导体集成电路器件
- 专利标题： Semiconductor integrated circuit device with variable gain amplifier
- 专利标题（中）： 具有可变增益放大器的半导体集成电路器件
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申请号： US09972152申请日： 2001-10-09
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公开(公告)号： US06727771B2公开(公告)日： 2004-04-27
- 发明人: Tsuyoshi Moribe , Kazuyoshi Arimura , Susumu Kato
- 申请人： Tsuyoshi Moribe , Kazuyoshi Arimura , Susumu Kato
- 优先权： JP2000-385375 20001219
- 主分类号： H03C300
- IPC分类号： H03C300
摘要：
A semiconductor integrated circuit device includes an orthogonal modulator that maintains carrier leak characteristics regardless of attenuation of an output signal level. The orthogonal modulator includes a phase shifter circuit and generates a modulation signal. An auto gain controller amplifies the modulation signal to generate an amplified modulation signal. A gain adjusting circuit adjusts a gain of the phase shifter circuit in accordance with a control signal.
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