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    • 7. 发明公开
    • 저잡음 증폭기
    • 低噪声放大器
    • KR1020060017873A
    • 2006-02-27
    • KR1020057024006
    • 2004-06-11
    • 엔에스씨 가부시키가이샤오미 다다히로
    • 오미다다히로니시무타다케후미미야기히로시스가와시게토시데라모토아키노부
    • H01L27/08H01L27/088H01L27/092H01L29/786
    • H01L21/82385H01L21/823807H01L27/092H01L29/785H03F1/26H03F2200/372H03G1/0029H03G1/007
    • A low-noise amplifier having an MIS transistor for suppressing noise to a low level and amplifying an input signal. The MIS transistor comprises a semiconductor substrate having a first crystal face as a major surface and a semiconductor structure formed as a part of the semiconductor substrate, and a diffusion region of the same conductive type. The semiconductor structure has a pair of side wall faces defined by a second crystal face different from the first one and a top face defined by a third crystal face different from the second one, a gate insulating film with a uniform thickness covering the major surface, side wall faces, and top face, and a gate electrode covering continuously the major surface, side wall faces, and top face, with the gate insulating film interposed. The diffusion region is formed over one and the other ends with the gate electrode interposed and is continuously extended along the major surface, side wall faces, and top face. Such a structure reduces drastically the 1/f noise and signal distortion given to the output signal by the low-noise amplifier, thereby needing no circuit for compensating the reduction, and reducing the size.
    • 一种具有用于将噪声抑制到低电平并且放大输入信号的MIS晶体管的低噪声放大器。 MIS晶体管包括具有作为主表面的第一晶面和形成为半导体衬底的一部分的半导体结构的半导体衬底和具有相同导电类型的扩散区。 半导体结构具有由不同于第一晶体面的第二晶面和由与第二晶体不同的第三晶面限定的顶面限定的一对侧壁面,覆盖主表面的均匀厚度的栅极绝缘膜, 侧壁面和顶面,以及栅极电极,其间隔着栅极绝缘膜连续地覆盖主表面,侧壁面和顶面。 扩散区域形成在一端和另一端,栅电极插入,并且沿主表面,侧壁面和顶面连续延伸。 这种结构大大降低了由低噪声放大器给予输出信号的1 / f噪声和信号失真,从而不需要用于补偿减小的电路并减小尺寸。