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1. US6320405 - Circuit for the switching of loads

Office
United States of America
Application Number 09485838
Application Date 09.05.2000
Publication Number 6320405
Publication Date 20.11.2001
Grant Number 6320405
Grant Date 20.11.2001
Publication Kind B1
IPC
H03K 19/003
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
19Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
003Modifications for increasing the reliability
H03K 17/08
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
08Modifications for protecting switching circuit against overcurrent or overvoltage
H03K 17/00
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
H03K 17/082
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
08Modifications for protecting switching circuit against overcurrent or overvoltage
082by feedback from the output to the control circuit
H03K 17/687
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and -breaking
51characterised by the use of specified components
56by the use, as active elements, of semiconductor devices
687the devices being field-effect transistors
CPC
H03K 17/0822
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and –breaking
08Modifications for protecting switching circuit against overcurrent or overvoltage
082by feedback from the output to the control circuit
0822in field-effect transistor switches
H03K 2017/0806
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
KPULSE TECHNIQUE
17Electronic switching or gating, i.e. not by contact-making and –breaking
08Modifications for protecting switching circuit against overcurrent or overvoltage
0806against excessive temperature
Applicants Robert Bosch GmbH
Inventors Koelsch, Volker
Topp, Rainer
Agents Kenyon & Kenyon
Priority Data 19735543 16.08.1997 DE
Title
(EN) Circuit for the switching of loads
Abstract
(EN)

An apparatus for switching loads, based on a starting signal, having a first MOSFET output stage and a second downstream MOSFET output stage, each of the MOSFET output stages being controllable by a logic circuit, with a power supply voltage of the downstream MOSFET output stage being supplied over the first MOSFET output stage. The apparatus includes a line that is adapted to connect each logic circuit of the MOSFET output stages and to provide an input voltage to a logic circuit of the downstream MOSFET output stage. The apparatus also includes a monitoring arrangement, which is activated by the starting signal, that is adapted to monitor the power supply voltage of the downstream MOSFET output stage and prevent activation of the first MOSFET output stage when the power supply voltage is below a predetermined value. Also included in this apparatus is a varying arrangement that is adapted to vary the input voltage when the first MOSFET output stage is activated based on the starting signal, and an activating arrangement that is adapted to activate the downstream MOSFET output stage. The activating arrangement includes a controlling arrangement, which is connected to the line and to another line connecting the MOSFET output stages, that is adapted to control activation of the downstream MOSFET output stage and prevent activation when the power supply voltage exceeds a threshold potential and the starting signal is not detected.