RC and SC filter compensation in a radio transceiver
First Claim
1. A method to operate a mobile station, comprising:
- measuring an actual value of at least one filter component value; and
determining at least one downstream adaptive filter coefficient using the measured actual value to so as to compensate the mobile station for a deviation of at least one filter component value from an ideal value,where the filter comprises an RC network, and where measuring measures an actual value of a capacitor, and then uses the measured actual value of the capacitor when measuring the value of a resistor.
8 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is apparatus for operating with an RC filter (26, 26A), and a corresponding method. The apparatus includes circuitry (32) for use in measuring an actual value of at least one filter component and a controller (34), coupled to the measurement circuitry, for determining at least one adaptive filter (36, 46) coefficient using the measured actual value to so as to compensate for a deviation of at least one filter component value from an ideal value. Where the filter is embodied as an RC network, the circuitry measures an actual value of both a resistor and a capacitor, and the controller uses the measured actual value of the capacitor when determining the value of a resistor.
34 Citations
7 Claims
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1. A method to operate a mobile station, comprising:
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measuring an actual value of at least one filter component value; and determining at least one downstream adaptive filter coefficient using the measured actual value to so as to compensate the mobile station for a deviation of at least one filter component value from an ideal value, where the filter comprises an RC network, and where measuring measures an actual value of a capacitor, and then uses the measured actual value of the capacitor when measuring the value of a resistor.
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2. A method to operate a mobile station, comprising:
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measuring an actual value of at least one filter component value; and determining at least one downstream adaptive filter coefficient using the measured actual value to so as to compensate the mobile station for a deviation of at least one filter component value from an ideal value, where the filter comprises an RC network, and where measuring comprises; determining a first amount of time required to charge a capacitor from a constant current source from an initial voltage to a threshold voltage; determining the actual value of the capacitor using the first amount of time; determining a second amount of time required to charge the capacitor from the initial voltage to the threshold voltage using a predetermined voltage applied through a resistor; and determining the actual value of the resistor using the second amount of time and the determined actual value of the capacitor.
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3. A method to operate a mobile station, comprising:
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measuring an actual value of at least one filter component value; and determining at least one downstream adaptive filter coefficient using the measured actual value so as to compensate the mobile station for a deviation of at least one filter component value from an ideal value, where the filter comprises an RC network, where measuring is used to determine a value of parameters kR and kC, and further comprising calculating the actual value of a resistor (Ract) and a capacitor (Cact) using kR and kC, respectively.
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4. A method to operate a mobile station, comprising:
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measuring an actual value of the at least one filter component value; and determining at least one downstream adaptive filter coefficient using the measured actual value so as to compensate the mobile station for a deviation of at least one filter component value from an ideal value, where the at least one filter coefficient is obtained from an s-domain transfer function by performing a z-transformation. - View Dependent Claims (5)
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6. Apparatus for operating with an RC filter comprising components integrated upon an integrated circuit, comprising:
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circuitry, included as a part of said integrated circuit, for use in measuring an actual value of at least one filter component; and a controller, coupled to said measurement circuitry, for determining at least one adaptive filter coefficient using the measured actual value so as to compensate for a deviation of at least one filter component value from an ideal value, where the filter comprises an RC network, and where said circuitry measures an actual value of a capacitor, and said controller then uses the measured actual value of the capacitor when determining the value of a resistor.
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7. Apparatus for operating with an RC filter comprising components integrated upon an integrated circuit, comprising:
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circuitry, included as a part of said integrated circuit, for use in measuring an actual value of at least one filter component; and a controller, coupled to said circuitry, for determining at least one adaptive filter coefficient using the measured actual value so as to compensate for a deviation of at least one filter component value from an ideal value, where the filter comprises an RC network, and where said circuitry comprises; means for determining a first amount of time required to charge a capacitor from a constant current source from an initial voltage to a threshold voltage, and where said controller determines the actual value of the capacitor using the first amount of time; and means for determining a second amount of time required to charge the capacitor from the initial voltage to the threshold voltage using a predetermined voltage applied through a resistor; and
where said controller determines the actual value of the resistor using the second amount of time and the determined actual value of the capacitor.
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Specification