Level-shifting device

An amplification device comprising a voltage level shifting device including:

• a first line set at a first reference voltage;
• a second line set at a second reference voltage greater than the first reference voltage;
• a third line set at a third reference voltage greater than the second reference voltage;
• an input terminal for receiving a first input signal switchable between a first input logic state corresponding to said first reference voltage and a second input logic state corresponding to said second reference voltage;
• an output terminal for supplying an output signal switchable between a first output logic state corresponding to said third reference voltage and a second output logic state corresponding to a fourth reference voltage obtained by reducing said third reference voltage by a predetermined operative voltage;
• a first electronic circuit having an input connected to the input terminal and an output connected to the output terminal, said first electronic circuit being activated following a commutation of the first input signal from the first reference voltage to the second reference voltage for fixing the output terminal to the fourth reference voltage;
• a second electronic circuit having a first input connected to the input terminal to receive the first input signal and a first output connected to the output terminal, said second electronic circuit being activated following a commutation of the first input signal from the second reference voltage to the first reference voltage, the second electronic circuit including:
• a circuital block connected between the third line and the first output, said circuital block being activated through a first input node for commutating the output terminal from the fourth reference voltage to the third reference voltage following said commutation of the first input signal from the second reference voltage to the first reference voltage, and
• a network operatively connected between the third line and the first input, configured to drive said first input node to maintain said circuital block activated at least for a first time interval greater than a second time interval requested to commutate said output terminal from the fourth reference voltage to the third reference voltage.

A portable electronic equipment comprising the amplification device having a voltage level shifting device including:

• a first line set at a first reference voltage;
• a second line set at a second reference voltage greater than the first reference voltage;
• a third line set at a third reference voltage greater than the second reference voltage;
• an input terminal for receiving a first input signal switchable between a first input logic state corresponding to said first reference voltage and a second input logic state corresponding to said second reference voltage;
• an output terminal for supplying an output signal switchable between a first output logic state corresponding to said third reference voltage and a second output logic state corresponding to a fourth reference voltage obtained by reducing said third reference voltage by a predetermined operative voltage;
• a first electronic circuit having an input connected to the input terminal and an output connected to the output terminal, said first electronic circuit being activated following a commutation of the first input signal from the first reference voltage to the second reference voltage for fixing the output terminal to the fourth reference voltage;
• a second electronic circuit having a first input connected to the input terminal to receive the first input signal and a first output connected to the output terminal, said second electronic circuit being activated following a commutation of the first input signal from the second reference voltage to the first reference voltage, the second electronic circuit including:
• a circuital block connected between the third line and the first output, said circuital block being activated through a first input node for commutating the output terminal from the fourth reference voltage to the third reference voltage following said commutation of the first input signal from the second reference voltage to the first reference voltage, and
• a network operatively connected between the third line and the first input, configured to drive said first input node to maintain said circuital block activated at least for a first time interval greater than a second time interval requested to commutate said output terminal from the fourth reference voltage to the third reference voltage.