Measurement circuit for isolation product
AssigneeSkyworks Solutions, Inc.
InventorCarlos J. Briseno-Vidrios
Life of this patent
Estimating the term…
Abstract
A method for measuring a received signal includes receiving a differential pair of signals by a differential pair of input nodes of a differential circuit. The method includes attempting to match a first current through a first node of the differential circuit corresponding to the differential pair of signals to a second current through a second node of the differential circuit corresponding to a feedback signal. The method includes generating an output measurement signal based on the first current and the second current. The output measurement signal has a level corresponding to an average amplitude of the differential pair of signals.
Claims20
A method for measuring a received signal, the method comprising:
- receiving a differential pair of signals by a differential pair of input nodes of a differential circuit;
- attempting to match a first current through a first node of the differential circuit corresponding to the differential pair of signals to a second current through a second node of the differential circuit corresponding to a feedback signal;
- and
- generating an output measurement signal based on the first current and the second current, the output measurement signal having a level corresponding to an average amplitude of the differential pair of signals.
A receiver comprising:
- a differential pair of nodes;
- and
- a differential circuit configured to attempt to match a first current through a first node based on a received signal provided to the differential pair of nodes and configured to generate a second current through a second node, the second current being based on a feedback signal;
- and
- a cascode circuit configured to provide an output measurement signal based on the first current and the second current, the output measurement signal having a level corresponding to an average amplitude of the received signal.
An isolator product comprising:
- a transmitter in a first integrated circuit die, the transmitter being selectively configured to transmit a common mode test signal having a frequency of a carrier signal used to transmit data via an isolation channel in a normal mode of operation of the isolator product;
- a differential pair of nodes in a receiver in a second integrated circuit die, the differential pair of nodes being configured to generate a received signal in response to the receiver receiving the common mode test signal from the second integrated circuit die via the isolation channel;
- the isolation channel coupled between the transmitter in the first integrated circuit die and the receiver in the second integrated circuit die;
- a differential circuit configured to attempt to match a first current through a first node based on the received signal provided to the differential pair of nodes and configured to generate a second current through a second node, the second current being based on a feedback signal;
- and
- a cascode circuit configured to provide an output measurement signal based on the first current and the second current, the output measurement signal having a level corresponding to an average amplitude of the received signal.
Dependencies are inferred from the claim text.