| 摘要 |
A protective circuit is disclosed 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 connected to the integrated circuit, and the PNP-transistor being connected with its collector to the input pad, and its emitter 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. |
