BATTERY-POWERED CONTROL DEVICE
First Claim
1. A control device comprising:
- a sensing circuit configured to generate a sensing signal;
a processing circuit configured to enter a sleep state when the sensing signal is in a steady state condition; and
a wake-up logic circuit configured to;
generate and pulse-width modulate (PWM) an enable control signal when the processing circuit is in the sleep state to periodically enable and disable the sensing circuit;
receive the sensing signal from the sensing circuit;
determine that a magnitude of the sensing signal has changed; and
upon determining that the magnitude of the sensing signal has changed, generate a wake-up signal for causing the processing circuit to change from the sleep state to an active state.
2 Assignments
0 Petitions
Accused Products
Abstract
Provided herein are examples of a remote control device that provides a retrofit solution for an existing switched control system. The remote control device may comprise a control circuit, a rotatable portion, a magnetic ring coupled to the rotatable portion, and first and second Hall-effect sensor circuits configured to generate respective first and second sensor control signals in response to magnetic fields generated by the magnetic elements. The control circuit may operate in a normal mode when the rotatable portion is being rotated, and in a reduced-power mode when the rotatable portion is not being rotated. The control circuit may disable the second Hall-effect sensor circuit in the reduced-power mode. The control circuit may detect movement of the rotatable portion in response to the first sensor control signal in the reduced-power mode and enable the second Hall-effect sensor circuit in response to detecting movement of the rotatable portion.
62 Citations
32 Claims
-
1. A control device comprising:
-
a sensing circuit configured to generate a sensing signal; a processing circuit configured to enter a sleep state when the sensing signal is in a steady state condition; and a wake-up logic circuit configured to; generate and pulse-width modulate (PWM) an enable control signal when the processing circuit is in the sleep state to periodically enable and disable the sensing circuit; receive the sensing signal from the sensing circuit; determine that a magnitude of the sensing signal has changed; and upon determining that the magnitude of the sensing signal has changed, generate a wake-up signal for causing the processing circuit to change from the sleep state to an active state. - View Dependent Claims (2, 3, 4, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
5. (canceled)
-
6. (canceled)
-
15. A control device comprising:
-
a rotatable portion; one or more magnetic elements connected to the rotatable portion and configured to generate magnetic fields; first and second Hall-effect sensor circuits configured to generate respective first and second sensor control signals in response to the magnetic fields generated by the magnetic elements; a processing circuit configured to determine an angular speed and/or an angular direction of the rotatable portion in response to the first and second sensor control signals generated by the first and second Hall-effect sensor circuits, respectively; wherein the control device is configured to operate in a reduced-power mode when the rotatable portion is not being rotated, wherein, when in the reduced-power mode, the processing circuit is configured to disable the second Hall-effect sensor circuit and enter a sleep state; and a wake-up logic circuit configured to; generate and pulse-width modulate (PWM) an enable control signal when the processing circuit is in the sleep state to periodically enable and disable the first Hall-effect sensor circuit; receive the first sensor control signal from the first Hall-effect sensor circuit; determine that a magnitude of the first sensor control signal has changed; and upon determining that the magnitude of the first sensor control signal has changed, generate a wake-up signal for causing the processing circuit to change from the sleep state to an active state.
-
-
16. A control device comprising:
-
a rotatable portion, wherein the control device is configured to operate in an active mode when the rotatable portion is being rotated, and operate in a reduced-power mode when the rotatable portion is not being rotated; one or more magnetic elements configured to generate magnetic fields connected to the rotatable portion; first and second magnetic sensing circuits configured to generate respective first and second sensor control signals in response to magnetic fields generated by the magnetic elements when the control device is operating in the active mode; and a control circuit configured to determine an angular speed and/or an angular direction of the rotatable portion in response to the first and second sensor control signals generated by the first and second magnetic sensing circuits, respectively; and wherein, when the control device is operating in the reduced-power mode, the control circuit is configured to; disable the second magnetic sensing circuit; detect movement of the rotatable portion in response to the first sensor control signal; and in response to detecting movement of the rotatable portion, enable the second magnetic sensing circuit and cause the control device to operate in the active mode. - View Dependent Claims (17, 18, 20, 21, 22, 23, 28, 29, 30, 31)
-
- 19. (canceled)
-
25. (canceled)
-
32-58. -58. (canceled)
Specification