Siemens Aktiengesellschaft

Ralf Schneider

Bret A Johnson

Zoltan Manyoki

Christian Sichert

Rainer Bartenschlager

A circuit configuration for reducing disturbances due to a switching of an output driver. The output driver has a plurality of output driver stages and a delay element. The delay element increases the signal delay of the switch-on or switch-off signals for the output driver stages with an increasing supply voltage.

Circuit configuration for reducing disturbances due to a switching of an

A pulse shaper circuit includes a buffer having an input, an output and two supply connections. A controllable first switch is connected between one of the supply connections and a first supply potential, a controllable second switch is connected between the other supply voltage connection and a second supply potential, a controllable third switch is connected between the output of the buffer and the first supply potential and a controllable fourth switch is connected between the output of the buffer and the second supply potential. A control device for the switches is connected to the output of the buffer and produces a first control pulse of a specific duration at the occurrence of first edges of a signal present at the output of the buffer and a second control pulse of a specific duration at the occurrence of second edges. The first control pulse changes over the first switch from the ON state to the OFF state and the fourth switch from the OFF state to the ON state. The second control pulse changes over the second switch from the ON state to the OFF state and the third switch from the OFF state to the ON state.

Pulse shaper circuit

An RS flip-flop has an inverter, connected to an input terminal of the RS flip-flop, a NOR gate having an Enable-Set input, a NAND gate having an Enable-Reset input, and a first and a second transistor connected to the inverter. The outputs of the NOR and NAND gates are connected, via the gate paths of the first and second transistors, to the gate electrode of a third and a fourth transistor, respectively. The third and the fourth transistor are connected in series and form a holding element, whose common connection point is connected to the output of the inverter and to the output terminal of the flip-flop.

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Munchen, Germany

Ralf Schneider