Active noise suppression for optical voltage sensor
AssigneeTektronix, Inc.
InventorsMichael J. Mende, Richard A. Booman
Life of this patent
Estimating the term…
Abstract
A sensor head of a test and measurement instrument can include an input configured to receive an input signal from a device under test (DUT), an optical voltage sensor having signal input electrodes and control electrodes or one set of electrodes, wherein the input is connected to the signal input electrodes, and a bias control unit connected to the control electrodes and configured to reduce an error signal or the input signal bias control signal are electrically combined and applied to a single set of electrodes.
Claims19
A sensor head of a test and measurement instrument, comprising:
- an input configured to receive an input signal from a device under test (DUT);
- an optical voltage sensor having signal input electrodes and control electrodes, wherein the input is connected to the signal input electrodes;
- and
- a bias control unit connected to the control electrodes and configured to reduce an error signal.
A measurement system, comprising:
- a host;
- a controller electrically coupled with the host;
- a device under test (DUT);
- a sensor head electrically coupled between the controller and the DUT, the sensor head including:
- an input configured to receive an input signal from the DUT;
- an optical voltage sensor having signal input electrodes and control electrodes, wherein the input is connected to the signal input electrodes;
- and
- a bias control unit connected to the control electrodes and configured to reduce an error signal.
A method for a test measurement system including a host, a controller, a sensor head, and a device under test, the method comprising:
- receiving an input signal from a device under test (DUT);
- measuring an optical output power of a photodiode of the sensor head;
- comparing the measured optical output power to a reference signal;
- identifying an error signal based on the comparing;
- and
- reducing the error signal.
A sensor head of a test and measurement instrument, comprising:
- an input configured to receive an input signal from a device under test (DUT);
- and
- an optical voltage sensor having one set of electrodes, wherein the input signal is configured to be combined with an error correction signal and applied to the one set of electrodes.
Dependencies are inferred from the claim text.