RC and SC filter compensation in a radio transceiver

Disclosed is apparatus for operating with an RC filter ( 26, 26 A), 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 ad...

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Bibliographische Detailangaben
Hauptverfasser:	HONKANEN TUOMAS, MAUNUKSELA JAAKO, VEPSAELAEINEN JUSSI
Format:	Patent
Sprache:	eng
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY ELECTRICITY MODULATION
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Beschreibung
Zusammenfassung:	Disclosed is apparatus for operating with an RC filter ( 26, 26 A), 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.