Abstract: A voltage follower includes a follower stage including first and second bipolar junction transistors connected in cascade, and a first current generator connected to the follower stage for biasing the first and second bipolar junction transistors. A cascode stage is connected between the first current generator and the first bipolar junction transistor, and a second current generator is connected between the first bipolar junction transistor and a first voltage reference. The voltage follower dissipates less power when the output current is small.

Abstract: A voltage follower includes a follower stage including first and second bipolar junction transistors connected in cascade, and a first current generator connected to the follower stage for biasing the first and second bipolar junction transistors. A cascode stage is connected between the first current generator and the first bipolar junction transistor, and a second current generator is connected between the first bipolar junction transistor and a first voltage reference. The voltage follower dissipates less power when the output current is small.

Abstract: A semiconductor electronic circuit with a protection device against supply voltage overloading, being of the type which comprises a first power circuit portion connected to a power supply line and enabled through at least a first transistor.This transistor has a control terminal driven by a voltage sensor connected to the power supply line. The semiconductor electronic circuit is characterized, moreover, in that it comprises a second signal circuit portion connected to the power supply line in a structurally independent manner of the first power circuit portion and through a controlled switch.

Abstract: Distorting effects and disturbances caused by abrupt voltage changes on the output nodes of a pair of selfconfiguring amplifiers for alternatively driving in a bridge mode or in a single-ended mode by one amplifier of the pair a certain load, in dependence on the level of the input signal, because of the enabling/disabling of a common mode control loop, are effectively eliminated by storing the voltage of a common mode control node of the pair of amplifiers on a capacitance during a phase of disabling of said common mode control loop. Abrupt voltage drops and recoveries at the switching instants are prevented.

Abstract: A circuit assembly for an operational amplifier has an input stage with first and second input terminals and an output terminal. An output stage has a first input terminal coupled to the output terminal of the input stage, a second input terminal, and an output terminal. A feedback circuit is coupled between the output terminal of the output stage and the second input terminal of the input stage. An interconnection circuit is coupled to the first and second input terminals and the output terminal of the output stage and to a reference voltage source. The interconnection circuit has first, second, and third modes, such that the second input terminal of the output stage is coupled to the reference voltage source when the interconnection circuit is in the first mode.

Abstract: A circuit assembly for an operational amplifier has an input stage with first and second input terminals and an output terminal. An output stage has a first input terminal coupled to the output terminal of the input stage, a second input terminal, and an output terminal. A feedback circuit is coupled between the output terminal of the output stage and the second input terminal of the input stage. An interconnection circuit is coupled to the first and second input terminals and the output terminal of the output stage and to a reference voltage source. The interconnection circuit has first, second, and third modes, such that the second input terminal of the output stage is coupled to the reference voltage source when the interconnection circuit is in the first mode.