Integrated circuit having a predefined dielectric strength
View Patent ↗An integrated circuit having a first connection, a second connection, a substrate, and a control connection, in provided. The control connection controls a conductivity of the integrated circuit between the first connection and the second connection. The integrated circuit further includes a first transistor and n additional transistors with conductive paths connected between the first connection and the second connection, n diodes, each of the n diodes being connected between a control connection of the n transistors and a driver supply voltage that corresponds to the voltage at the first connection combined with an additive offset, and wherein the control connection of the integrated circuit connects either the driver supply voltage or the voltage at the first connection to a control connection of the first transistor, and a voltage divider that is connected between the first connection and the second connection in parallel to the conductive paths and that connects the control connections of the transistors to one another and to both the first connection and the second connection. The control connections of each set of two transistors are connected to one another by a subsection of the voltage divider, which lies between them.
1. An Integrated circuit comprising:
a first connection;
a second connection;
a substrate; and
a main control connection for controlling a conductivity of the integrated circuit between the first connection and the second connection;
a first transistor and n additional transistors having conductive paths connected in series between the first connection and the second connection, wherein n is an integer greater than or equal to 1, each of said transistor and said n additional transistors having a transistor control connection;
n diodes, each of the n diodes being connected between a transistor control connection of the n transistors and a driver supply voltage that corresponds to a voltage at the first connection combined with an additive offset, the main control connection connecting either the driver supply voltage or the voltage at the first connection to a control connection of the first transistor; and
a voltage divider connected between the first connection and the second connection and in parallel to the conductive paths, the voltage divider connecting the transistor control connections of the n transistors and the transistor control connection of the first transistor to one another and to both the first connection and the second connection,
wherein the control connections of each set of two transistors are connected to one another by a subsection of the voltage divider which lies between them.
2. The integrated circuit according to claim 1 , wherein the voltage divider has a diode connected between the second connection and the control connection of the n transistor whose conductive path is connected to the second connection.
3. The integrated circuit according to claim 1 , further comprising a series connection of n Zener diodes, each of which is connected in parallel to one of the subsections of the voltage divider connecting the transistor control connections of the transistors to one another.
4. The integrated circuit according to claim 1 , wherein a resistor is provided between the control connection of the integrated circuit and the control connection of the first transistor.
5. The integrated circuit according to claim 1 , wherein the transistors are MOS field-effect transistors.
6. The integrated circuit according to claim 1 , wherein the integrated circuit is based on CMOS technology.
7. The integrated circuit according to claim 1 , wherein a circuit section passes a variable voltage to the first connection.
8. The integrated circuit according to claim 1 , wherein a first power transistor has a conductive path between the first connection and a power supply voltage connection and is controlled by the second connection.
9. The integrated circuit according to claim 1 , wherein an additional power transistor has a conductive path in series with the conductive path of the first power transistor between the power supply voltage connection and a reference voltage connection of the integrated circuit.