St-ericsson Sa

Stmicroelectronics (grenoble 2) Sas

Stmicroelectronics (alps) Sas

Oct Circuit Technologies International Limited

Emmanuel Allier

Marc Sabut

Thierry Masson

Francois Amiard

François Amiard

Vincent Binet

Matthieu Desvergne

In an embodiment a switch includes a first MOS transistor having its source connected to its channel-forming region and coupled with a first terminal of the switch, its drain coupled with a second terminal of the switch, and its gate connected to a first node of the switch, a diode coupling the first terminal with the first node, a capacitive element coupling a third terminal of the switch with the first node, the third terminal being configured to receive a control signal for the switch and a discharge circuit coupling the first node with the first terminal, the discharge circuit configured to conduct only when a voltage between the first node and the first terminal is greater than or equal to a threshold.

Switch and sampling circuit

There is disclosed a driver circuit for a power amplifier of class D type having a segmented architecture with at least one current branch which can be powered down in a low power mode of operation of the circuit. The branch comprising a switch with a cascode MOS transistor, the circuit further comprises a bias circuitry adapted for dynamically generating a dynamic bias control signal so as to cause the cascode MOS transistor of the switch to be 'Off' in the low power mode.

Cascode bias of power MOS transistors

Growing community of inventors

Grenoble, France

Emmanuel Allier