Shock detector circuit
AssigneeEM Microelectronic-Marin SA
InventorsYves GODAT, Nicolas JEANNET
Life of this patent
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Abstract
An electronic device including: a calculation unit configured to generate a signal representative of a physical magnitude, for a motor driving a display device, the motor including two terminals, one positive and one negative, via which the calculation unit controls the motor; at least one shock detection circuit connected between the calculation unit and one terminal of the motor for detection of an external shock applied to the motor. The shock detection circuit includes a comparison part comparing an induced voltage generated in the motor following a shock to a predetermined reference voltage to identify a shock, and a selection part.
Claims7
1-7. (canceled)
An electronic device comprising:
- a calculation unit configured to generate a signal representative of a physical variable, for a motor driving a display device, the motor comprising two terminals, one positive and one negative, via which the calculation unit controls the motor;
- at least one circuit configured for shock detection connected between the calculation unit and one terminal of the motor for the detection of an external shock applied to the motor capable of moving a rotor of the motor;
- wherein the circuit configured for shock detection includes a selection part directly connected to one of the motor terminals, to vary an induced voltage generated in the motor following a shock with a movement of the rotor to improve sensitivity of the shock detector circuit, and a comparison part including a positive input and a negative input and connected to the selection part for comparing an output signal from the selection part to a predetermined reference voltage to identify a shock;
- and
- wherein the selection part comprises a series of series connected resistors, a first of the resistors being connected to the motor connection terminal and a last resistor of the series connected to ground;
- the selection part further comprising a selector including an output connected to the positive input of the comparison part and a plurality of selection points, each connected to one resistor.
Dependencies are inferred from the claim text.