IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0496674
(2006-07-31)
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등록번호 |
US-7489855
(2009-02-10)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Eschweiler & Associates, LLC
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인용정보 |
피인용 횟수 :
1 인용 특허 :
9 |
초록
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One embodiment of the invention relates to a control system. A control system includes a controller configured to generate a drive signal as a function of a comparison between a first control signal and a second control signal, wherein the first control signal differs from the second control signal
One embodiment of the invention relates to a control system. A control system includes a controller configured to generate a drive signal as a function of a comparison between a first control signal and a second control signal, wherein the first control signal differs from the second control signal. A switching device is configured to generate an output control signal having a duty cycle that is a function of the drive signal. Other systems and methods are also disclosed.
대표청구항
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What is claimed is: 1. A control system, comprising: a controller configured to generate a drive signal as a function of a comparison between a user defined threshold signal and a second control signal, the user defined threshold signal differing from the second control signal; a timing circuit tha
What is claimed is: 1. A control system, comprising: a controller configured to generate a drive signal as a function of a comparison between a user defined threshold signal and a second control signal, the user defined threshold signal differing from the second control signal; a timing circuit that is coupled to the controller and adapted to provide the second control signal, wherein the second control signal is representative of a frequency; and a switching device configured to generate an output control signal having a duty cycle that is a function of the drive signal; wherein the timing circuit comprises: an oscillator configured to generate an oscillating voltage signal having a rise time; and a wave shape circuit configured to derive the second control signal from the oscillating voltage such that the second control signal has a rise time that is greater than the rise time of the oscillating voltage signal. 2. The control system of claim 1, wherein the controller is configured to control the duty cycle of the output control signal. 3. The control system of claim 2, wherein the switching device has an on-state mode of operation, and further comprising: a timing network that is configured to output a gated signal to the switching device, wherein the gated signal maintains a relationship with a predetermined threshold during the on-state mode of operation of the switching device, and maintains another, different relationship with the predetermined threshold during an off-state mode of the switching device. 4. A control system, comprising: a p-channel high-side MOSFET for providing a high-side current and voltage; an n-channel low-side MOSFET for providing a low-side current and voltage; a driver integrated circuit for selectively controlling the p-channel high-side MOSFET and the n-channel low-side MOSFET; and a controller configured to receive a first control signal and a second control signal, and to provide a drive signal to the driver integrated circuit based on a comparison of the first and second control signals, the controller comprising: a modulator block having a first input related to the first control signal, a second input related to the second control signal, and an output configured to generate the drive signal; a user-manipulatable current source coupled to the first input of the modulator block; an oscillator configured to generate an oscillating voltage signal having a rise time; and a wave shape circuit configured to derive the second control signal from the oscillating voltage signal such that the second control signal has a rise time that is greater than the rise time of the oscillating voltage signal. 5. The control system of claim 4, wherein the p-channel high-side MOSFET, the n-channel low-side MOSFET, the driver integrated circuit, and the controller are integrated in a single integrated circuit package. 6. A method for driving a load with a current switching device, comprising: providing a drive signal via a controller, wherein the drive signal is generated as a function of a first control signal and a second control signal that is different from the first control signal; and receiving a drive signal at a current switching device, wherein the current switching device is capable of driving the load in response thereto, and wherein the drive signal comprises a pulse width modulation signal comprising a first state and a second state during an on-state of the load; and processing the drive signal to generate a gated signal with a decay region, the decay region engineered to cross a predetermined threshold at a predetermined time to place the current switching device in an off-state of the load. 7. The method of claim 6, further comprising: providing the first control signal in response to a user-manipulatable current control that is capable of being positioned within the reach of a vehicle occupant. 8. The method of claim 7, wherein the control system has a single connection coupleable to the user-manipulatable current control to ease integration of the control system into a vehicle. 9. The method of claim 6, further comprising: providing the second control signal as a function of an oscillator. 10. A method for driving a motor with a current switching device, comprising: providing a drive signal via a pulse width modulator cell, wherein the drive signal is generated as a function of a dynamically adjustable user input and a frequency input; receiving a drive signal at the current switching device, wherein the current switching device is capable of driving the motor in response thereto, and wherein the drive signal comprises a pulse width modulation signal comprising a first state and a second state during an on-state of the motor; and processing the drive signal to generate a gated signal with a decay region, the decay region engineered to cross a predetermined threshold at a predetermined time to place the current switching device in an off-state of the motor. 11. The method of claim 10, wherein the decay region begins at a time associated with the transition from the first and second state of the drive signal. 12. The method of claim 11, wherein the decay region alleviates at a time associated with the transition from the second state back to the first state. 13. A system for driving a motor, comprising: pulse-width modulation means for providing a drive signal from a user-manipulatable current source and a frequency input; a current switching circuit for generating an output control signal as a function of the drive signal in an on-state mode of operation, wherein the output control signal is capable of driving a motor; and a user-manipulatable device for controlling the user-manipulatable current source; wherein a single connection is coupleable to the user-manipulatable current source to ease integration. 14. The system of claim 13, further comprising: a timing network for providing a gated signal to the current switching circuit wherein the gated signal maintains a relationship with a predetermined threshold during the on-state mode of operation of the current switching circuit, and maintains another, different relationship with the predetermined threshold during an off-state mode of the current switching circuit. 15. A control system, comprising: a controller configured to generate a drive signal as a function of a comparison between a first control signal and a second control signal, the first control signal differing from the second control signal; a switching device configured to generate an output control signal having a duty cycle that is a function of the drive signal; and a timing network that is configured to output a gated signal to the switching device, wherein the gated signal maintains a relationship with a predetermined threshold during an on-state mode of operation of the switching device, and maintains another, different relationship with the predetermined threshold during an off-state mode of the switching device. 16. A control system, comprising: a controller configured to generate a drive signal as a function of a comparison between a first control signal and a second control signal, the first control signal differing from the second control signal; and a switching device configured to generate an output control signal having a duty cycle that is a function of the drive signal; wherein the first control signal comprises a threshold signal that is adapted to be dynamically altered by a user.
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