5.
    发明专利
    未知

    公开(公告)号:FR2842316A1

    公开(公告)日:2004-01-16

    申请号:FR0208624

    申请日:2002-07-09

    Abstract: The linear regulator (30) has a control unit (35) and output circuit (31) to supply a load (1) and smoothing capacitor (11). The output circuit consists of two MOS transistors (32,33) which supply an output terminal (OUT) and are controlled by connections to their grids (G1,G2) from the input/output stage (36) of the control unit. The input/output stage uses data from a reference unit (37) and the output circuit for regulation

    6.
    发明专利
    未知

    公开(公告)号:FR2819904A1

    公开(公告)日:2002-07-26

    申请号:FR0100745

    申请日:2001-01-19

    Abstract: The invention concerns a voltage regulator having an output terminal (O) adapted to be connected to a load (R, C), comprising a device (1) limiting the current (Iout) passing through the load to a threshold current (It1) if the output terminal potential (Vout) is lower than a threshold potential (Vt), and to a second threshold current (It2) is higher than the first threshold current if the output terminal potential (Vout) is higher than the threshold potential (Vt).

    A method of generating a voltage ramp at a terminal of a capacitor, with compensation for supply rail transients.

    公开(公告)号:GB2385472B

    公开(公告)日:2006-06-28

    申请号:GB0301963

    申请日:2003-01-28

    Abstract: A ramp capacitor CAP1 has a first terminal connected to a power supply voltage VBAT. A generator circuit is connected to a second terminal of the ramp capacitor and adapted to generate a voltage ramp at the terminals of the ramp capacitor. The generator circuit includes a constant current source SCC connected to the second terminal B12 of the ramp capacitor CAP1 and auxiliary circuit MAX adapted in the presence of a transient variation of the power supply voltage to determine the transient current flowing in the ramp capacitor and generated by the transient variation. Responsive thereto, delivery is made to the second terminal B12 of the ramp capacitor CAP1 of a charging current equal to the algebraic sum of the constant current delivered by the constant current source and an auxiliary current equal and opposite to the transient current.

    A method of generating a voltage ramp at the terminals of a capacitor

    公开(公告)号:GB2385472A

    公开(公告)日:2003-08-20

    申请号:GB0301963

    申请日:2003-01-28

    Abstract: The electronic device includes a ramp capacitor CAP1 having a first terminal connected to a power supply voltage VBAT, and generator means connected to a second terminal of the ramp capacitor and adapted to generate a voltage ramp at the terminals of the ramp capacitor. The generator means include a constant current source SCC connected to the second terminal B12 of the ramp capacitor CAP1 and auxiliary means MAX adapted in the presence of a transient variation of the power supply voltage to determine the transient current flowing in said ramp capacitor and generated by said transient variation and to deliver to the second terminal B12 of the ramp capacitor CAP1 a charging current equal to the algebraic sum of the constant current delivered by the constant current source and an auxiliary current equal and opposite to the transient current. The method is applied to a step-down switching regulator in a mobile phone.

    9.
    发明专利
    未知

    公开(公告)号:FR2835664A1

    公开(公告)日:2003-08-08

    申请号:FR0201302

    申请日:2002-02-04

    Abstract: A ramp capacitor CAP1 has a first terminal connected to a power supply voltage VBAT. A generator circuit is connected to a second terminal of the ramp capacitor and adapted to generate a voltage ramp at the terminals of the ramp capacitor. The generator circuit includes a constant current source SCC connected to the second terminal B12 of the ramp capacitor CAP1 and auxiliary circuit MAX adapted in the presence of a transient variation of the power supply voltage to determine the transient current flowing in the ramp capacitor and generated by the transient variation. Responsive thereto, delivery is made to the second terminal B12 of the ramp capacitor CAP1 of a charging current equal to the algebraic sum of the constant current delivered by the constant current source and an auxiliary current equal and opposite to the transient current.

    10.
    发明专利
    未知

    公开(公告)号:FR2819904B1

    公开(公告)日:2003-07-25

    申请号:FR0100745

    申请日:2001-01-19

    Abstract: A voltage regulator having an output terminal adapted to being connected to a load, including a device for limiting the current flowing through the load to a first threshold current if the voltage of the output terminal is lower than a threshold voltage, and to a second current threshold higher than the first current threshold if the voltage of the output terminal is greater than the threshold voltage.

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