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    • 3. 发明授权
    • Driver circuit
    • 驱动电路
    • US07323923B2
    • 2008-01-29
    • US11211638
    • 2005-08-26
    • Eisaku MaedaHiroshi AndoJinsaku KanedaAkihiro MaejimaHiroki Matsunaga
    • Eisaku MaedaHiroshi AndoJinsaku KanedaAkihiro MaejimaHiroki Matsunaga
    • H03L5/00
    • H03K3/356113G09G3/296G09G2330/04H03K3/012H03K19/0013
    • A driver circuit is provided for preventing generation of a pass-through current in a CMOS output unit even if a power supply voltage VDD supplied from a low voltage power supply drops below a recommended operating power supply voltage. The driver circuit includes a level shift unit having PMOS transistors and NMOS transistors, and a CMOS output unit having a PMOS transistor and an NMOS transistor. The source, drain and gate of one PMOS transistor are respectively connected to a high voltage power supply, a first contact and a second contact. The source, drain and gate of a second PMOS transistor are respectively connected to a high voltage power supply, the second contact and the first contact. The source of one NMOS transistor is grounded, the drain thereof is connected to the first contact, and the gate thereof receives a low voltage signal. The source of a second NMOS transistor is grounded, the drain thereof is connected to the second contact, and the gate thereof receives a low voltage signal. In this driver circuit, the driving current of the one PMOS transistor is higher than the driving current of the one NMOS transistor.
    • 即使从低电压电源提供的电源电压VDD低于推荐的工作电源电压,也提供用于防止在CMOS输出单元中产生通过电流的驱动电路。 驱动器电路包括具有PMOS晶体管和NMOS晶体管的电平移位单元和具有PMOS晶体管和NMOS晶体管的CMOS输出单元。 一个PMOS晶体管的源极,漏极和栅极分别连接到高压电源,第一触点和第二触点。 第二PMOS晶体管的源极,漏极和栅极分别连接到高压电源,第二触点和第一触点。 一个NMOS晶体管的源极接地,其漏极连接到第一触点,其栅极接收低电压信号。 第二NMOS晶体管的源极接地,其漏极连接到第二触点,并且其栅极接收低电压信号。 在该驱动电路中,一个PMOS晶体管的驱动电流高于一个NMOS晶体管的驱动电流。