公开(公告)号：US5719490A

公开(公告)日：1998-02-17

申请号：US521991

申请日：1995-08-31

Applicant: Valeria Germini

Inventor： Valeria Germini

IPC: G05F3/24 ,  G11C5/14 ,  G11C16/30 ,  G05F1/56 ,  G11C13/00

CPC classification number: G11C5/14 ,  G05F3/24 ,  G11C16/30 ,  Y10T307/696

Abstract: A dual sourced voltage supply circuit for use with a flash EPROM or the like and comprising output voltage circuitry including an input for receiving a control signal determining which of two voltage supplies is used to provide an output of the dual sourced voltage supply circuit. The output voltage is provided by one of the two voltage supplies by means of a controllable conductive path connected between one voltage supply and an output node of the circuit. Such controllable conductive path comprises, in series, a first MOSFET transistor connected to the voltage supply and a second MOSFET transistor connected to the output node, both transistors are of the same conductivity type and are arranged to be activated in dependence on the input of the output voltage circuitry; moreover, each transistor has a body connection connected to a respective channel electrode; the body connections are arranged to prevent charge injection occurring between the other channel electrode of the same transistor and the body of the second and first transistor respectively.

Abstract translation: 一种与闪存EPROM等一起使用的双电源电压电路，包括输出电压电路，其包括用于接收控制信号的输入，该输入确定使用两个电压源中的哪一个来提供双源电压电路的输出。 输出电压由连接在电路的一个电压源和输出节点之间的可控导电路径由两个电压源之一提供。 这种可控导电路径串联包括连接到电压源的第一MOSFET晶体管和连接到输出节点的第二MOSFET晶体管，两个晶体管具有相同的导电类型，并且被布置为根据 输出电压电路; 此外，每个晶体管具有连接到相应沟道电极的主体连接; 主体连接被布置成防止在同一晶体管的另一个沟道电极和第二和第一晶体管的主体之间发生电荷注入。

公开(公告)号：US5696461A

公开(公告)日：1997-12-09

申请号：US521666

申请日：1995-08-31

Applicant: Valeria Germini

Inventor： Valeria Germini

IPC: H03K17/22 ,  H03L7/00

CPC classification number: H03K17/223

Abstract: A threshold detection circuit for generating a detection signal when a power supply voltage exceeds a predetermined threshold. The threshold detection circuit comprises a first detection stage, a second detection stage, and a control circuitry. The first detection stage is connected between the power supply voltage and a reference voltage, and includes a first pull-up device and a first switching device connected in series and provides a control node therebetween. The second detection stage is connected between the power supply voltage and the reference voltage and includes a controllable pull down device and a second switching device connected in series, and provides an output node therebetween. The controllable pull down device has a control terminal coupled to the control node. Finally, the control circuitry controls the first and second switching devices to prevent a DC path between the power supply voltage and the reference voltage outside an operational voltage range of the threshold detection circuit.

Abstract translation: 一种阈值检测电路，用于在电源电压超过预定阈值时产生检测信号。 阈值检测电路包括第一检测级，第二检测级和控制电路。 第一检测级连接在电源电压和参考电压之间，并且包括串联连接的第一上拉装置和第一开关装置，并在它们之间提供控制节点。 第二检测级连接在电源电压和参考电压之间，并包括串联连接的可控下拉装置和第二开关装置，并在它们之间提供输出节点。 可控制的下拉装置具有耦合到控制节点的控制终端。 最后，控制电路控制第一和第二开关装置，以防止在阈值检测电路的工作电压范围之外的电源电压和参考电压之间的DC路径。