Measurement circuit for isolation product
AssigneeSilicon Laboratories Inc.
InventorCarlos J. Briseno-Vidrios
Life of this patent
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Abstract
A method includes generating a first current through a first node based on a differential pair of signals received by a differential pair of input nodes of a differential circuit of a first integrated circuit die of an isolator product. The method includes generating a second current through a second node. The second current matches the first current through the first node and is based on an attenuated version of an output measurement signal. The method includes generating the output measurement signal having a level corresponding to an average amplitude of the differential pair of signals based on the first current and the second current.
Claims20
A method comprising:
- generating a first current through a first node based on a differential pair of signals received by a differential pair of input nodes of a differential circuit of a first integrated circuit die of an isolator product;
- generating a second current through a second node, the second current matching the first current through the first node and being based on an attenuated version of an output measurement signal;
- and
- generating the output measurement signal having a level corresponding to an average amplitude of the differential pair of signals based on the first current and the second current.
An isolator product comprising:
- a first integrated circuit die comprising:
- a differential pair of nodes;
- and
- a measurement circuit configured to generate an output measurement signal having a level corresponding to an average amplitude of a received signal provided to the differential pair of nodes, the measurement circuit comprising:
- a differential circuit configured to generate a first current through a first node based on the received signal and configured to generate a second current through a second node, the second current matching the first current based on an attenuated version of the output measurement signal;
- and
- a feedback circuit configured to provide the attenuated version of the output measurement signal to the differential circuit.
A circuit comprising:
- a differential pair of nodes;
- and
- a measurement circuit configured to generate an output measurement signal having a linear relationship to a function of an amplitude of a received signal provided to the differential pair of nodes, the measurement circuit comprising:
- a differential circuit configured to generate a first current through a first node based on the received signal and configured to generate a second current through a second node, the second current matching the first current based on an attenuated version of the output measurement signal;
- and
- a feedback circuit configured to provide the attenuated version of the output measurement signal to the differential circuit, the feedback circuit comprising a resistance having a value corresponding to a target gain of the linear relationship.
Dependencies are inferred from the claim text.