Digitally tuned capacitors with tapered and reconfigurable quality factors

摘要

The present disclosure describes tuning capacitors with tapered and reconfigurable quality factors. Digitally tuned capacitors (DTCs) that provide a variable quality factor (Q) while maintaining a constant or near constant capacitance as well as DTCs that provide one or more Q values in a tapered distribution while maintaining a constant or near constant capacitance are described. The present disclosure also describes DTCs that provide one or more capacitances in a tapered distribution and one or more Q values in a tapered distribution.

主权项

1. A digitally tuned capacitor (DTC) adapted for use in a circuit device, comprising:
a first terminal; a second terminal; and a plurality of bit stages in parallel between the first terminal and the second terminal, each bit stage comprising at least one switch connected with at least one capacitor, wherein:
the plurality of bit stages is configured to be controlled by a numeric control word in binary representation, each bit of the numeric control word representing a switching state of one bit stage in the plurality of bit stages, wherein the switching state is either an ON state or an OFF state, andstates of the DTC with same number of ON states is configured to provide a variable quality factor while maintaining a constant or near constant capacitance around a fixed level.