Digital isolator
AssigneeSg Micro Corp
InventorZhilin Li
Life of this patent
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Abstract
The present application discloses a digital isolator including a signal transmitting circuit, a signal receiving circuit, and an isolation circuit. The isolation circuit is coupled between the signal transmitting circuit and the signal receiving circuit. The isolation circuit includes a first isolation unit for converting a received input modulation signal into a differential signal and a second isolation unit for providing an output modulation signal in response to receiving the differential signal. The first isolation unit and the second isolation unit have symmetrical circuit structures. By using a fully differential structure and a fully symmetrical structure, the circuit has improved immunity capability, and can suppress common mode transient interference greater than 200 kv/us.
Claims17
A digital isolator comprising:
- a signal transmitting circuit, a signal receiving circuit, and an isolation circuit coupled between the signal transmitting circuit and the signal receiving circuit, the isolation circuit comprising:
- a first isolation unit, configured to convert a received input modulation signal into a differential signal;
- a second isolation unit, configured to provide an output modulation signal in response to receiving the differential signal,
- wherein the first isolation unit and the second isolation unit have symmetrical circuit structures.
Dependencies are inferred from the claim text.