Single-transformer digital isolation barrier
First Claim
1. A communication link, comprising:
- an isolation barrier including a transformer having a system-side winding and a line-side winding;
a system-side interface circuit connected to the transformer'"'"'s system-side winding; and
a line-side interface circuit connected to the transformer'"'"'s line-side winding, wherein;
(a) the system-side interface circuit is capable of transmitting a digital data signal across the transformer to the line-side interface circuit, the digital data signal having energy to supply a substantial portion of the line-side interface circuit'"'"'s electrical load, and(b) the line-side interface circuit is capable of rectifying the digital data signal to produce a line-side rectified voltage signal.
6 Assignments
0 Petitions
Accused Products
Abstract
The invention provides a single digital communication link between system-side and line-side circuitry in a DAA, capable both of carrying data signals and of transferring a substantial amount of power to the line-side circuitry. The invention comprises a system-side interface circuit, a line-side interface circuit, and an isolation barrier including a transformer. Each interface circuit is capable of connection to an upstream communication circuit (either line-side or system-side), from which it may receive data signals to be transmitted across the isolation barrier to the other interface circuit, and to which it may pass data signals received across the isolation barrier from the other interface circuit. The line-side interface circuit may further include a rectifier and a storage device.
31 Citations
18 Claims
-
1. A communication link, comprising:
-
an isolation barrier including a transformer having a system-side winding and a line-side winding; a system-side interface circuit connected to the transformer'"'"'s system-side winding; and a line-side interface circuit connected to the transformer'"'"'s line-side winding, wherein; (a) the system-side interface circuit is capable of transmitting a digital data signal across the transformer to the line-side interface circuit, the digital data signal having energy to supply a substantial portion of the line-side interface circuit'"'"'s electrical load, and (b) the line-side interface circuit is capable of rectifying the digital data signal to produce a line-side rectified voltage signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17)
-
-
10. A method of transferring digital data and power from a system-side circuit to a line-side circuit connected via an isolation barrier including a transformer having a system-side winding and a line-side winding, comprising the steps of:
-
inputting, into the transformer'"'"'s system-side winding, a digital data signal having energy to supply a substantial portion of the line-side circuit'"'"'s electrical load; transforming the digital data signal at the transformer'"'"'s system-side winding to a transformed digital data signal at the transformer'"'"'s line-side winding; providing a portion of the transformed digital data signal to a receive buffer; rectifying another portion of the transformed digital data signal to create a rectified signal; and storing the rectified signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 18)
-
Specification