Automatic input impedance control
First Claim
1. An input impedance control circuit, comprising:
- a circuit controller comprising;
a module for calculating an impedance; and
a control logic module, wherein the control logic module provides a current enable signal and a current control output signal;
a driver in communication with the circuit controller for receiving the current enable signal and the current control output signal;
an input voltage sensing circuit in communication with the module for calculating the impedance and the control logic module; and
an input current sensing circuit in communication with the module for calculating the impedance.
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Accused Products
Abstract
The present disclosure is directed to an input impedance control circuit. In one embodiment, the automatic input impedance control circuit includes a circuit controller that comprises a module for calculating an impedance and a control logic module, wherein the control logic module provides a current enable signal and a current control output signal, a driver in communication with the circuit controller for receiving the current enable signal and the current control output signal, an input voltage sensing circuit in communication with the module for calculating the impedance and the control logic module and an input current sensing circuit in communication with the module for calculating the impedance.
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Citations
20 Claims
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1. An input impedance control circuit, comprising:
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a circuit controller comprising; a module for calculating an impedance; and a control logic module, wherein the control logic module provides a current enable signal and a current control output signal; a driver in communication with the circuit controller for receiving the current enable signal and the current control output signal; an input voltage sensing circuit in communication with the module for calculating the impedance and the control logic module; and an input current sensing circuit in communication with the module for calculating the impedance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling an impedance of a circuit, comprising:
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determining a threshold based upon an initial supply voltage; determining a minimum operating impedance; monitoring a supply voltage; determining the supply voltage is below the threshold; and enabling a constant impedance mode of a driver in response to determining that the supply voltage is below the threshold by controlling a current to the driver to maintain the minimum operating impedance within a range based upon the supply voltage. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A tangible computer readable medium to store a plurality of instructions which, when executed by a processor, cause the processor to perform operations for controlling an impedance of a circuit, the operations comprising:
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determining a threshold based upon an initial supply voltage; determining a minimum operating impedance; monitoring a supply voltage; determining the supply voltage is below the threshold; and enabling a constant impedance mode of a driver in response to determining that the supply voltage is below the threshold by controlling a current to the driver to maintain the minimum operating impedance within a range based upon the supply voltage. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification