Protective circuit

H - Electricity – 01 – L

Patent

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Details

H01L 27/02 (2006.01) H01L 23/60 (2006.01)

Patent

CA 2302021

The present invention relates to a protective circuit for protecting an integrated circuit against electrostatic discharge, so called ESD. The integrated circuit is connected to a supply voltage via a Vcc-pad (2) and an earth pad (3). The protective circuit, which is particularly intended to protect a positively supplied circuit for radio frequency applications against both negative and positive voltage pulses, comprises an input pad (14) and at least one PNP-transistor (20), the input pad being connnected to the integrated circuit, and the PNP-transistor being connected with its collector to the input pad, and its emitter connected either to the Vcc-pad or to the earth pad. The base of the PNP-transistor can be connected to its emitter either directly or via a resistor (24), or not be connected.

l'invention concerne un circuit protecteur permettant de protéger un circuit intégré contre la décharge éloectrostatique (ESD). Le circuit intégré est connecté à une alimentation en tension via un plot (2) de phase et un plot (3) de masse. Le circuit de protection, qui est particulièrement destiné à protéger un circuit à alimentation positive, destiné à des applications radioélectriques, contre les impulsions de tension positives et négatives, comprend un plot (14) d'entrée et au moins un transistor PNP (20). La plage de connexion d'entrée est connecté au circuit intégré et le transistor PNP est connecté par son collecteur au plot d'entrée et son émetteur est connecté soit au plot de phase soit au plot de masse. La base du transistor PNP peut être connectée à son émetteur directement ou par l'intermédiaire d'une résistance (24) ou pas être connectée.

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