Cartesian feedback loop transmitter with improved loop filter
AssigneeAnalog Devices, Inc.
InventorChristoph Maximilian STEINBRECHER
Life of this patent
Estimating the term…
Abstract
A filter may include multiple circuit sub-systems, where one circuit sub-system may have an output connected to an input of another circuit sub-system. Each circuit sub-system may include an amplifier with an output connected to the output of the circuit sub-system. Each circuit sub-system may include a first network connecting an input of the circuit sub-system to a first reference input of the amplifier, and a second network connecting the output of the amplifier to the first reference input of the amplifier. The filter may include a link network connecting the output of one circuit sub-system to an input of another circuit sub-system.
Claims20
A filter comprising:
- a plurality of circuit sub-systems, including a first circuit sub-system and a second circuit sub-system, wherein the first circuit sub-system having an output connected to an input of the second circuit sub-system;
- and
- a link network connecting an output of the second circuit sub-system to connect a feedback directly and only to an input of the first circuit sub-system;
- wherein each circuit sub-system of the plurality of circuit sub-systems includes:
- an amplifier with an output connected to an output of the circuit sub-system;
- a first network connecting an input of the circuit sub-system to a reference input of the amplifier;
- and
- a second network connecting the output of the amplifier to the reference input of the amplifier.
A system comprising:
- a coupling network;
- and
- a filter having an output connected to the coupling network, the coupling network generating a feedback signal connected to an input of the filter;
- wherein the filter includes:
- a plurality of circuit sub-systems, including a first circuit sub-system and a second circuit sub-system, wherein the first circuit sub-system having an output connected to an input of the second circuit sub-system;
- and
- a link network connecting an output of the second circuit sub-system to connect a feedback directly and only to an input of the first circuit sub-system;
- wherein each circuit sub-system of the plurality of circuit sub-systems includes:
- an amplifier with an output connected to an output of the circuit sub-system;
- a first network connecting an input of the circuit sub-system to a reference input of the amplifier;
- and
- a second network connecting the output of the amplifier to the reference input of the amplifier.
Dependencies are inferred from the claim text.