公开(公告)号：JPH0677741A

公开(公告)日：1994-03-18

申请号：JP14343093

申请日：1993-06-15

Applicant: SGS THOMSON MICROELECTRONICS ,  MARELLI AUTRONICA

Inventor： ARUBERUTO POOMA ,  BANNI PORETSUTO ,  MARUKO MORERI

IPC: H01L27/06 ,  H03F1/52 ,  H03K17/06 ,  H03K17/082

Abstract: PURPOSE: To provide a simple circuit configuration which has excellent frequency stability and performs accurate current control. CONSTITUTION: A resistance (Rs) is in series with a drain-source path of a MOS power transistor (M1). A feed terminal (J) of a mutual conductance operational amplifier (A) is connected to an output part for boosting a voltage or of a charging pump(CP) circuit that can output a voltage higher than a voltage of a power source (Vs) to which the drain of the MOS transistor (M1) is connected. An input part of the amplifier (A) is connected to the resistance (Rs), its output part is connected to a gate of the MOS transistor (M1) and as the result a maximum current flowing to the power transistor (M1) at time of the operation is limited to a value proportional to a reference voltage (VR).

公开(公告)号：JPS647758A

公开(公告)日：1989-01-11

申请号：JP6833288

申请日：1988-03-24

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： BANNI PORETSUTO

IPC: H04Q3/42 ,  H04M19/00 ,  H04Q1/28

Abstract: PURPOSE: To conduct switching voltage adjustment in an excellent way by controlling on/off state of two transistor(TR) circuits, supplying a required small current to the circuit in the on-state and increasing the response speed through a smoothing circuit in the case of throwing a switch. CONSTITUTION: When an enable signal is fed to a storage element 3 and an output Q1 is set to H, an output Q2 of a FF 4 and a power supply A2 go to H and an output U2 of an AND gate 5 goes to H, and a current amplifier 9 is activated. Furthermore, the output Q1 goes to H, then a power supply A3 is active, a TR T2 is conductive to activate a switch circuit consisting of the TRs T1, T2 and power is fed to a load RL via an interface circuit 16. In this case, an on-state detection circuit 14 gives a signal to an input R2 of the FF 4 to set the output Q2 to an L level, then a current is supplied only to the TRs T1, T2 from the power supply A3. In the case of switching a switch, a quick response speed is conducted quickly by a smoothing circuit consisting of a diode D, a coil L and a capacitor C.

公开(公告)号：JPH0575030A

公开(公告)日：1993-03-26

申请号：JP2934092

申请日：1992-02-17

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： FURANCHIESUKO KORANDOREA ,  BANNI PORETSUTO

IPC: H01L27/04 ,  H01L21/822 ,  H01L27/06 ,  H03K17/06 ,  H03K17/082

Abstract: PURPOSE: To provide a protecting circuit which has a correct substrate bias, even at the time when there is losses as to the ground loss protecting device of specifically a high-side driver MOS device. CONSTITUTION: This device includes a high-side driver device 10 having an input terminal 15, a substrate 11 which is grounded, and an output terminal 12 for driving a load 13 outside the high-side driver device 10. The output terminal 12 is given by the source terminal of an MOS transistor 17. At least one terminal of the load 13 is connected to the output terminal 12, and the other terminal of the load 13 is grounded. This protecting device includes at least one diode 14, which connects the substrate 11 to the output terminal 12. The diode 14 grounds the substrate 11 via the load 13, if the ground connection for substrate 11 is disconnected.

公开(公告)号：JPH06342322A

公开(公告)日：1994-12-13

申请号：JP30499891

申请日：1991-11-20

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： BANNI PORETSUTO

IPC: G06F1/24 ,  H03K3/00 ,  H03K17/24

Abstract: PURPOSE: To provide a microprocessor reset device for which the enabling of reset signals depends on not only the duration of the decline of an input voltage relating to a nominal value but also the value. CONSTITUTION: A first comparator 1 closes a switch 2 for controlling the discharge of a capacitor 4 when the input signals VIN of a device becomes equal to or lower than a first threshold Th1 . A second comparator 5 connected to the capacitor 4 enables the reset signals XR when the input signals VS related to the voltage of the capacitor becomes equal to or lower than a second threshold Th2 . Since the reset signals XR are enabled depending on the duration of the reduction of the input signals VIN to be equal to or less than the first threshold Th1 and the value of the reduction, the input signals V1 of the second comparator 5 are composed of the linear combination of the input signals VIN and the voltage VC of the capacitor and it is brought about by an addition element 15.

公开(公告)号：JPH05108173A

公开(公告)日：1993-04-30

申请号：JP4135192

申请日：1992-02-27

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： BANNI PORETSUTO ,  MARUKO MORETSURI ,  BURUNO MURARI

IPC: G05F1/56 ,  G05F1/569 ,  G05F1/59 ,  H02J9/06

Abstract: PURPOSE: To provide a voltage regulator with extremely high reliability and long useful life designed in order to reduce interference at an output end resulted from the switching of the power source element of 9T1 adjuster to the minimum. CONSTITUTION: A voltage (VA') of a capacitor and an input voltage (VA) are detected, and as long as the input voltage is more than two applied threshold values (VTH1 , and VTH2 ), both switches 16 and 19 are held to be on. When the input voltage is higher than the capacitor voltage (VA>VA') and smaller than the first threshold (VA

公开(公告)号：JPH04337813A

公开(公告)日：1992-11-25

申请号：JP3077092

申请日：1992-02-18

Applicant: SGS THOMSON MICROELECTRONICS

Inventor： FURANCHIESUKO KORANDOREA ,  BANNI PORETSUTO

IPC: G05F1/56 ,  G05F1/575 ,  H03K17/082 ,  H03K17/16

Abstract: PURPOSE: To provide a current controller for a power source circuit especially in MOS technology, which controls a frequency for the wide range of a current value. CONSTITUTION: The current controller specified for the power source circuit in MOS technology contains a MOSFET transistor 40. The source terminal is connected to one terminal of a diffusion load 41. The gate terminal is connected to a pump circuit 43 and it receives power voltage VIN and square wave voltage (VOSC, 46) in input, and the drain terminal is connected to a power source 44. The controller contains a control circuit 47, is connected to the MOSFET transistor 40 with electric connection and generates a signal for adjusting power voltage VIN of the pump circuit 43 and square wave voltage (VOSC, 46).