Measurement and calibration of mismatch in an isolation channel
AssigneeSkyworks Solutions, Inc.
InventorCarlos J. Briseno-Vidrios
Life of this patent
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Abstract
A method for calibrating an isolator product includes receiving a calibration signal on a differential pair of nodes of a receiver signal path of a first integrated circuit die of the isolator product. The method includes generating a diagnostic signal having a level corresponding to an average amplitude of the calibration signal on the differential pair of nodes. The method includes configuring a programmable receiver signal path based on the diagnostic signal. Generating the diagnostic signal may include providing an analog signal based on a full-wave rectified version of the calibration signal on the differential pair of nodes. Generating the diagnostic signal may include converting the analog signal to a digital signal.
Claims20
A method for calibrating an isolator device, the method comprising:
- receiving, with a receiver signal path of a first integrated circuit die of the isolator device, a first signal across an isolation channel coupled between a differential pair of receiver nodes of the first integrated circuit die and a differential pair of transmitter nodes of a second integrated circuit die of the isolator device;
- in response to the first signal, generating a second signal indicative of mismatch of the isolation channel;
- and
- configuring the receiver signal path based on the second signal.
An isolator device comprising:
- an isolation channel;
- a first integrated circuit die including a transmitter configurable to transmit a first signal across the isolation channel;
- a second integrated circuit die including a receiver signal path coupled to the isolation channel to receive the first signal on a differential pair of receiver nodes and further including first circuitry configurable, in response to the first signal, to generate a second signal indicative of mismatch of the isolation channel;
- and
- second circuitry configurable, in response to the second signal, to program the receiver signal path based on the second signal.
An isolator product comprising:
- an isolation channel;
- a receiver signal path including a first gain stage and a second gain stage, the receiver signal path configured, when the isolator product is in a diagnostic mode of operation, to receive a first signal across the isolation channel;
- and
- circuitry coupled to the receiver signal path and responsive to the isolator product being configured in the diagnostic mode of operation to generate a second signal based on the first signal, the receiver signal path further configured, when the isolator product is a normal mode of operation, to operate one or more of the first gain stage and the second gain stage based on a value of the second signal measured while the isolator product was configured in the diagnostic mode of operation.
Dependencies are inferred from the claim text.