Time-based control of a system having integration response
AssigneeCirrus Logic, Inc.
InventorJohn L. Melanson
Life of this patent
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Abstract
A time-based controller provides control for a controlled system including a plant having an integration response. The time-based controller includes a comparator that detects a polarity change in a comparison of a sensed signal from the plant and a reference signal while a control signal is in a first state, time calculation logic that, responsive to detection of the change in the comparison, determines a time at which to change a state of a control signal supplied to the plant, and a modulator that, at the determined time, changes the state of the control signal supplied to the plant from the first state to a second state.
Claims24
A time-based controller for a controlled system including a plant having an integration response, said time-based controller comprising:
- a comparator that, while a control signal supplied to the plant has a first state, detects, at a first time, a polarity change in a comparison of a sensed signal from the plant and a reference signal;
- time calculation logic that, based upon the first time, determines a second time at which to change a state of a control signal supplied to the plant;
- and
- a modulator that, at the determined second time, changes the state of the control signal supplied to the plant from the first state to a second state.
A method of time-based control for a controlled system including a plant having an integration response, said method comprising:
- while a control signal supplied to the plant is in a first state, detecting at a first time a polarity change in a comparison of a sensed signal from the plant and a reference signal;
- based upon the first time, determining a second time at which to change a state of a control signal supplied to the plant;
- and
- at the determined second time, changing the state of the control signal supplied to the plant from the first state to a second state.
A program product, comprising:
- a tangible data storage medium;
- and
- program code stored within the tangible data storage medium that causes digital circuitry to implement time-based control for an integrator by detecting, at a first time, a polarity change in a comparison of a sensed signal from the plant and a reference signal while a control signal supplied to the plant is in a first state, determining, based upon the first time, a second time at which to change a state of a control signal supplied to the plant, and changing the state of the control signal supplied to the plant from the first state to a second state at the determined second time.
Dependencies are inferred from the claim text.