中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

15 records (took 0.02 seconds)

    12.
    发明专利
    未知

    公开(公告)号：DE69927004D1

    公开(公告)日：2005-10-06

    申请号：DE69927004

    申请日：1999-06-16

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CALI GIOVANNI ,  PAPARO MARIO ,  PELLERITI ROBERTO

    IPC: G05F1/575

    Abstract: The invention relates to a low-drop type of voltage regulator (1) formed with BiCMOS/CMOS technology and being of the type which comprises: an input terminal (IN), receiving a stable voltage reference (Vrif) and being connected to one input (-) of an operational amplifier (2) through a switch controlled by a power-on enable signal (CE); a supply voltage reference (Vpos) powering the operational amplifier (2); an output transistor (M1) connected to an output (U) of the amplifier (2) to generate a regulated voltage value (Vreg) to be fed back to the amplifier (2) input; a second transistor (M2) connected in series between the output transistor (M1) and the supply voltage reference (Vpos). The regulator of this invention comprises a control circuit portion (7) connected between the control terminal of the second transistor (M2) and the supply voltage reference (Vpos) to prevent the breakdown of the output transistor (M1) from occurring.

    13.
    发明专利
    未知

    公开(公告)号：DE69819677T2

    公开(公告)日：2004-09-30

    申请号：DE69819677

    申请日：1998-02-19

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CALI GIOVANNI ,  GRANATA ANGELO ,  PALMISANO GIUSEPPE

    IPC: H03F3/72 ,  H03F3/00

    Abstract: A circuit for switching a capacitor (C) in an exclusive manner, on the selected one of a plurality of integrated amplifiers (A1, A2, ... AN) comprises a first current generator (IB) connected between a first supply node (VCC) and a first node of the circuit (H), a second current generator (IC) connected between a second supply node (GND) and a second node (L) of the circuit, electrically in parallel to the capacitor (C), an array of switches (S1, S2, ..., SN) of the same number of the integrated amplifiers, exclusively switcheable on, each connecting a directly biased diode (D1, D2, ..., DN) between the first node (H) and the second node (L), each integrated amplifier having a supply node coupled to the connecting node between a respective diode and a respective connecting switch of said array.

    14.
    发明专利
    未知

    公开(公告)号：ITMI20021336A1

    公开(公告)日：2003-12-17

    申请号：ITMI20021336

    申请日：2002-06-17

    Applicant: ST MICROELECTRONICS SRL

    Inventor： CALI GIOVANNI ,  PELLERITI ROBERTO ,  TORRISI FELICE

    IPC: H03F3/45

    Abstract: A device for converting a differential signal (Vin1, Vin2) to a single signal (Vout) is described. The device comprises at least one pair of transistors (Q1, Q2) having equal transconductance gain (gm) and which are arranged according a differential stage configuration. The transistors (Q1, Q2) have the differential signal (Vin1, Vin2) in input at the drivable terminals, have first non drivable terminals coupled respectively to first terminals of a first (R1) and a second (Rout) passive elements having second terminals connected with a first supply voltage (VDD), second non drivable terminals coupled to a second supply voltage (VEE) lower than the first supply voltage (VDD). The first terminal of the second passive element (Rout) is the output terminal (OUT) of the device. The last comprises a further transistor (Q3) having a first non drivable terminal connected with the output terminal (OUT) of the device, a second non drivable terminal coupled with said second supply voltage (VEE) and the drivable terminal connected with the first terminal of the first passive element (R1). The further transistor (Q3) has such a transconductance gain (gm3) that the product of said transconductance gain (gm3) by said first passive element (R1) is unitary.

Patent Agency Ranking