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US 8,138,816 B2Granted
Digitally controlled high Q factor capacitor
AssigneeM/A-COM Technology Solutions Holdings, Inc.
InventorsAndrew K. Freeston, Jack Redus
Life of this patent
Estimating the term…
Abstract
A control circuit and a conversion circuit. The control circuit may be configured to generate an analog control signal in response to a digital control signal. The conversion circuit may be configured to generate a capacitance signal in response to the analog control signal.
Claims16
An apparatus comprising:
- a control circuit configured to generate an analog control signal in response to a digital control signal, wherein said control circuit comprises a digital interface circuit and a digital-to-analog converter circuit;
- and
- a conversion circuit configured to generate a capacitance signal in response to said analog control signal, wherein said digital interface circuit comprises a plurality of resistors each configured to be switched in response to said analog control signal.
An apparatus comprising:
- means for generating an analog control signal in response to a digital control signal, wherein said generating means comprises a digital interface circuit and a digital-to-analog converter circuit;
- and
- means for generating a capacitance signal in response to said analog control signal, wherein said digital interface circuit comprises a plurality of resistors configured to be switched in response to said analog control signal.
A method for digitally controlling a capacitance comprising the steps of:
- (A) generating an analog control signal in response to a digital control signal, wherein said control circuit comprises a digital interface circuit and a digital-to-analog converter circuit;
- and
- (B) generating a capacitance signal in response to said analog control signal, wherein said digital interface circuit comprises a plurality of resistors configured to be switched in response to said analog control signal.
Dependencies are inferred from the claim text.