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US 9,250,299 B1Granted
Universal industrial analog input interface
AssigneeCypress Semiconductor Corporation
InventorsArchana Yarlagadda, Derek Richardson, Gaurang Kavaiya, Dennis Seguine, Mark Hastings
Life of this patent
Estimating the term…
Abstract
A sensor system comprising a plurality of sensors configured to produce an output based on at least one condition and isolated from a measurement circuit is described. The isolation circuit may be configurable to output an analog signal within the measurement range of a measurement signal.
Claims17
A sensor system comprising:
- a plurality of sensors configured to generate a plurality of electrical signals in response to at least one condition;
- a measurement subsystem configured to convert the electrical signals to digitized values,
- wherein the plurality of sensors is ohmically isolated from the measurement subsystem, and
- wherein at least one of the plurality of sensors is coupled to the measurement subsystem through an analog isolation circuit;
- and
- a configuration circuit for adjusting the electrical signals of the plurality of sensors, wherein the configuration circuit comprises a resistor network, a multiplexor coupled between the resistor network and the analog optoisolator, and a microcontroller configured to send signals to the multiplexor to connect and disconnect resistors in the resistor network based on expected electrical signals from each of the plurality of sensors.
3 more elements
A method comprising:
- measuring at least one condition with a plurality of sensors;
- generating an analog signal with each of the plurality of sensors based on the at least one condition;
- communicating the analog signal from each of the plurality of sensors to a measurement circuit through an analog isolation circuit;
- and
- adjusting the analog signal for at least one of the plurality of sensors with a microcontroller and through a plurality of switches, a resistor network, and a multiplexor coupled between the resistor network and the analog optoisolator to connect and disconnect resistors in the resistor network based on expected values from the respective sensor of the plurality of sensors.
2 more elements
An analog signal processing device comprising:
- a measurement circuit configured to convert an analog output from at least one sensor of a plurality of sensors to a digital value;
- a processor configured to execute commands for the processing and communication of the digital value;
- and
- a configuration circuit for adjusting the electrical signals of the plurality of sensors, wherein the configuration circuit comprises a resistor network, a multiplexor coupled between the resistor network and the analog optoisolator, and a microcontroller configured to send signals to the multiplexor to connect and disconnect resistors in the resistor network based on expected electrical signals from each of the plurality of sensors
- wherein the at least one sensor sensors is ohmically isolated from the measurement subsystem through an analog isolation circuit.
2 more elements
Dependencies are inferred from the claim text.