Opto-emulator
EP4771758A1Pending Publication Date: 2026-07-08TEXAS INSTRUMENTS INC
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Patent Information
- Application Number
- EP2024773259
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-11-30
- Filing Date
- 2024-08-30
- Publication Date
- 2026-07-08
AI Technical Summary
Technical Problem
Opto-emulators face issues with non-linearity in the ratio of output current (Ic) to input current (IF), which affects their performance and reliability compared to optocouplers.
Method used
The opto-emulator transmitter includes a current controller, an oscillator circuit, and receiver replica circuitry, which work together to provide a transmit signal that is adjusted based on feedback, ensuring improved linearity of the current transfer ratio (CTR) over a wide range of Ic and IF values.
Benefits of technology
This configuration enhances the linearity of the CTR, providing improved immunity and isolation ratings, thus addressing the non-linearity issues faced by traditional opto-emulators.
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Abstract
An opto-emulator transmitter (102A) includes: a current controller (222); an oscillator circuit (238); and receiver replica circuitry (258). The current controller (222) has a first terminal (224), a second terminal (228), and a third terminal (230). The oscillator circuit (238) has a first terminal (240), a second terminal (242), and a third terminal (244). The first terminal (240) of the oscillator circuit (238) is coupled to the second terminal (228) of the current controller (222). The receiver replica circuitry (258) has a first terminal (260), a second terminal (262), and a third terminal (264). The first terminal (260) of the receiver replica circuitry (258) is coupled to the second terminal (242) of the oscillator circuit (238). The second terminal (262) of the receiver replica circuitry (258) is coupled to the third terminal (244) of the oscillator circuit (238). The third terminal (264) of the receiver replica circuitry (258) is coupled to the third terminal (230) of the current controller (222).
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