Baseband RC filter pole and on-chip current tracking system

An apparatus and method are provided for tracking the poles of an integrated RC filter as well as the absolute value of a current source. A single tracking oscillator contains integrated elements such as a programmable resistor and fixed capacitor or a programmable capacitor and fixed resistor. The...

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Bibliographische Detailangaben
1. Verfasser:	GODAMBE NIHAL J
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS RESONATORS SELECTING RESONANT CIRCUITS TUNING RESONANT CIRCUITS
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Beschreibung
Zusammenfassung:	An apparatus and method are provided for tracking the poles of an integrated RC filter as well as the absolute value of a current source. A single tracking oscillator contains integrated elements such as a programmable resistor and fixed capacitor or a programmable capacitor and fixed resistor. The programmable element is programmed such that a particular response from the RC filter is achieved and the word used to program the programmable element is then supplied to other integrated RC filters having components that were fabricated at the same time as the RC filter in the tracking oscillator. A highly accurate external capacitor or resistor is supplied to determinate the absolute value of the programming element, which is used to program one or more current sources containing the programmable resistor.