Baseband RC filter pole and on-chip current tracking system

Details Baseband RC filter pole and on-chip current tracking system Baseband RC filter pole and on-chip current tracking system

2005-07-07

2008-03-04

Pascal, Robert (Department: 2817)

Oscillators

Phase shift type

C327S553000, C327S554000

Reexamination Certificate

active

07339442

ABSTRACT:
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.

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