公开(公告)号：US07777568B2

公开(公告)日：2010-08-17

申请号：US11002616

申请日：2004-12-02

申请人： Hong Sair Lim

发明人： Hong Sair Lim

IPC分类号： H03F3/18

CPC分类号： H03F3/45219 ,  H03F3/189 ,  H03F3/45224 ,  H03F2200/451 ,  H03F2203/45054 ,  H03F2203/45496 ,  H03F2203/45641

摘要： A folded cascode receiver amplifier with constant gain has inputs coupled to PMOS and NMOS differential transistors pairs with scaled geometries. The transconductance of both PMOS and NMOS transistors is the same whether the common mode input voltage is low or high. In a first version the transconductance of both PMOS and NMOS differential transistor pairs is reduced when the common mode input voltage is at mid-rail. Resistive means between current sources and the sources of the PMOS and NMOS transistor pairs force the current source transistors into the triode region of operation. A second version insures a constant voltage gain through control means which maintain a constant ratio of the transconductance of the output stage transistors versus the PMOS and NMOS differential transistor pairs when active.

摘要翻译： 具有恒定增益的折叠共源共栅放大器具有耦合到具有缩放几何形状的PMOS和NMOS差分晶体管对的输入。 无论共模输入电压是低还是高，PMOS和NMOS晶体管的跨导是相同的。 在第一个版本中，当共模输入电压处于中间轨道时，PMOS和NMOS差分晶体管对的跨导就会减小。 电流源和PMOS和NMOS晶体管对的源极之间的电阻装置迫使电流源晶体管进入三极管工作区域。 第二个版本通过控制装置确保恒定的电压增益，当激活时，输出级晶体管的跨导与PMOS和NMOS差分晶体管对保持恒定的比例。

公开(公告)号：US20100301939A1

公开(公告)日：2010-12-02

申请号：US12806095

申请日：2010-08-05

申请人： Hong Sair Lim

发明人： Hong Sair Lim

IPC分类号： H03F3/45 ,  H03F1/22

CPC分类号： H03F3/45219 ,  H03F3/189 ,  H03F3/45224 ,  H03F2200/451 ,  H03F2203/45054 ,  H03F2203/45496 ,  H03F2203/45641

摘要： A folded cascode receiver amplifier with constant gain has inputs coupled to PMOS and NMOS differential transistors pairs with scaled geometries. The transconductance of both PMOS and NMOS transistors is the same whether the common mode input voltage is low or high. In a first version the transconductance of both PMOS and NMOS differential transistor pairs is reduced when the common mode input voltage is at mid-rail. Resistive means between current sources and the sources of the PMOS and NMOS transistor pairs force the current source transistors into the triode region of operation. A second version insures a constant voltage gain through control means which maintain a constant ratio of the transconductance of the output stage transistors versus the PMOS and NMOS differential transistor pairs when active.

摘要翻译： 具有恒定增益的折叠共源共栅放大器具有耦合到具有缩放几何形状的PMOS和NMOS差分晶体管对的输入。 无论共模输入电压是低还是高，PMOS和NMOS晶体管的跨导是相同的。 在第一个版本中，当共模输入电压处于中间轨道时，PMOS和NMOS差分晶体管对的跨导就会减小。 电流源和PMOS和NMOS晶体管对的源极之间的电阻装置迫使电流源晶体管进入三极管工作区域。 第二个版本通过控制装置确保恒定的电压增益，当激活时，输出级晶体管的跨导与PMOS和NMOS差分晶体管对保持恒定的比例。