Data carrier comprising an integrated circuit with an ESD protection circuit
AssigneeNXP B.V.
InventorRoland Brandl
Life of this patent
Estimating the term…
Abstract
In the case of a data carrier (1) or an integrated circuit (5) for the data carrier (1), an ESD protection circuit (8) is formed by means of a series connection (9) comprising a first protection diode (10) and a protection stage (11) together with a second protection diode connected in parallel with the series connection (9), and a rectifier circuit (13) connected with the ESD protection circuit (8) is provided, which comprises a rectifier diode connected in parallel with the ESD protection circuit (8), wherein the rectifier diode takes the form of a Schottky diode (21) with a parasitic p/n junction (26) and wherein the Schottky diode (21) with the parasitic p/n junction (26) forms the second protection diode of the ESD protection circuit (8).
Claims8
An integrated circuit for a data carrier, comprising:
- a first terminal and a second terminal, wherein the two terminals are provided for connection with transmission means of the data carrier,
- an ESD protection circuit, which is connected between the two terminals and which comprises a series connection consisting of a first protection diode and a protection stage, which protection stage may be brought from a blocking state into a conductive state by exceeding a voltage threshold, and which comprises a second protection diode connected in parallel with the series connection and in opposition to the first protection diode of the series connection, and
- a rectifier circuit, which is connected to the ESD protection circuit and comprises a rectifier diode connected in parallel with the ESD protection circuit,
- wherein the rectifier diode of the rectifier circuit takes the form of a pure Schottky diode with a parasitic p/n junction and wherein the pure Schottky diode with the parasitic p/n junction simultaneously forms the second protection diode of the ESD protection circuit.
A data carrier for contactless communication with a communications station, which data carrier comprises:
- transmission means and
- an integrated circuit connected with the transmission means, which integrated circuit comprises:
- a first terminal and a second terminal, wherein the two terminals are connected with the transmission means,
- an ESD protection circuit, which is connected between the two terminals and which comprises a series connection consisting of a first protection diode and a protection stage, which protection stage may be brought from a blocking state into a conductive state by exceeding a voltage threshold, and which comprises a second protection diode connected in parallel with the series connection and in opposition to the first protection diode of the series connection, and
- a rectifier circuit, which is connected to the ESD protection circuit and comprises a rectifier diode connected in parallel with the ESD protection circuit,
- wherein the rectifier diode of the rectifier circuit takes the form of a pure Schottky diode with a parasitic p/n junction and wherein the pure Schottky diode with the parasitic p/n junction simultaneously forms the second protection diode of the ESD protection circuit.
Dependencies are inferred from the claim text.