초록 ▼

A wakeup signal generating circuit is connected to an input of an electrically driven motor having a drive shaft that is mechanically coupled to a power sliding door or power lift gate of an automobile. The motor is normally responsive to a motor drive signal to control door/lift gate movement via r

A wakeup signal generating circuit is connected to an input of an electrically driven motor having a drive shaft that is mechanically coupled to a power sliding door or power lift gate of an automobile. The motor is normally responsive to a motor drive signal to control door/lift gate movement via rotation of the motor drive shaft. In the absence of the motor drive signal, the motor is responsive to rotation of the drive shaft, via manual movement of the door or lift gate, to produce a back electromotive force (EMF) signal at the input of the motor. The wakeup signal generating circuit is responsive to the back EMF signal to produce a wakeup signal. In one embodiment, the wakeup signal is used to cause a control circuit controlling the overall operation of the motor to wake up from a reduced-function, power conserving sleep mode of operation and operate in a full-function, full power wakeup mode of operation.

대표청구항 ▼

1. Circuitry for producing a wakeup signal based on back electromotive force (EMF) of a motor, comprising:a motor having a drive shaft and at least one input for receiving a motor drive signal, said motor responsive to said motor drive signal to rotate said drive shaft, said motor producing a back E

1. Circuitry for producing a wakeup signal based on back electromotive force (EMF) of a motor, comprising:a motor having a drive shaft and at least one input for receiving a motor drive signal, said motor responsive to said motor drive signal to rotate said drive shaft, said motor producing a back EMF signal at said at least one input in the absence of said motor drive signal and in response to rotational movement of said drive shaft; and a wakeup circuit having an input connected to said at least one input of said motor and an output, said wakeup circuit responsive to said back EMF signal at said input thereof to produce a wakeup signal at said output thereof.