Output buffer

摘要

In the case of output buffers according to the prior art, the power requirement at the supply voltage terminal or earth terminal changes quickly if the output buffer switches over between supply voltage VCC and earth VSS. This produces a sudden voltage change in the supply voltage VCC and/or the earth voltage VSS. To prevent this, a capacitor is provided, which is connected to an output node of a buffer according to the invention in order to reduce the current which flows to the supply voltage terminal and/or the earth terminal while the output level is changing. A voltage drop and sudden voltage changes of the supply voltage and of the earth voltage are reduced by applying a charging voltage, to which the capacitor is charged. <IMAGE>