Stmicroelectronics Design and Application S.r.o.

Stmicroelectronics S.a.

Peter Murin

Hynek Saman

Pavel Panus

Martin Boksa

Tomas Folk

An electronic amplifier for driving a capacitive load may include first and second differential input terminals to receive an input signal, and first and second differential output terminals to provide a differential output signal. The amplifier may further include a first operational device having first and second differential inputs connected to the first and second differential input terminals, respectively, and an output connected to the first differential output terminal, and a second operational device having first and second differential inputs connected to the first and second differential input terminals, respectively, and an output connected to the second differential output terminal. The first and second operational devices may be operatively configured so that both the first and the second output terminals are at a same reference potential during periods in which a magnitude of differential output signal amplitude decreases.

Capacitive load driving amplifier

A switch including a first transistor including a first main terminal connected to a first switch node, a second main terminal connected to a second switch node and a control terminal, the second switch node being connected to a first clean voltage supply, and first control circuitry connected to the control terminal of the first transistor, including a first node connected to the first clean voltage supply, a second node connected to a second voltage level, and a control input node for receiving a first input control signal variable between a supply voltage level and a third voltage level, the first control means arranged to selectively connect the control terminal of the first transistor to one of the first node and the second node based on the first input control signal.

Amplifier input switch configuration with improved PSRR

An amplifier with an output protection having an input stage defining a feedback node, an output stage connected to the feedback node and defining an output node supplying an output voltage, and a feedback stage connected between the output and the feedback nodes. A mirror stage is connected to the feedback node and has the same structure as the output stage, the mirror stage defining a reference node connected to the feedback stage for generating a reference voltage to be compared to the output voltage by the feedback stage. The feedback stage generates a current limitation signal fed to the feedback node when a difference between the output and the reference voltages is higher than a threshold.

Amplifier having an output protection, in particular operational amplifier for audio application

A circuit including a first sensitive node, a first component connected between the first sensitive node and a first terminal of a first switch, said first switch controlled by a first control signal variable between a supply voltage level and a second voltage level, and a second switch including a first terminal connected to the first terminal of said first switch, and a second terminal connected to a clean voltage supply, said second switch controlled to connect the first node of said first switch to said clean voltage supply when said first switch is in a non-conducting state.

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Poltar, Slovakia

Peter Murin