发明申请
- 专利标题: Communication semiconductor integrated circuit device and electrical apparatus
- 专利标题(中): 通信半导体集成电路器件和电气设备
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申请号: US11011153申请日: 2004-12-15
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公开(公告)号: US20050136847A1公开(公告)日: 2005-06-23
- 发明人: Hiroaki Matsui , Taizo Yamawaki , Masahiro Ito , Masakatsu Yokota
- 申请人: Hiroaki Matsui , Taizo Yamawaki , Masahiro Ito , Masakatsu Yokota
- 优先权: JP2003-421726 20031219
- 主分类号: H03G11/00
- IPC分类号: H03G11/00 ; H03F1/32 ; H03F1/52 ; H03F3/195 ; H03F3/45 ; H03F3/72 ; H03G3/10 ; H03G3/30 ; H04B1/44
摘要:
A communication semiconductor integrated circuit (high frequency IC) that has a function of differentially-singly converts and outputs a transmitted signal suppressing deterioration of a harmonic suppression characteristic and enables miniaturization and an electronic component (high frequency module) that mounts the communication semiconductor integrated circuit are provided. In the communication semiconductor integrated circuit (high frequency IC) having a limiter that amplifies a modulated and up-converted transmitted signal and supplies a power amplifier with the signal, an unbalanced reduction means having, for example, differential MOS transistors is provided in collectors or drains of differential transistors that construct the limiter to output pins and continue to apply a current to the output pins and reduces the impedance of the transistor on an off side even when one of the transistors enters an off state in accordance with an input signal in parallel to the transistor.
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