System and method for receiving data across an isolation barrier
First Claim
Patent Images
1. A system for communication comprising:
- a receiver for receiving data from a passive transmitter capacitively coupled to the receiver via a isolation barrier, wherein the receiver comprises a sensing element havinga first plurality of terminals configured to be capacitively coupled to the passive transmitter and DC isolated from the passive transmitter;
a first terminal for sending a reference signal; and
a second terminal for receiving an input signal, wherein a state of the passive transmitter is determined based on a transmission factor between the reference signal and the received input signal and comparing the transmission factor or portions of the transmission factor to a threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
In one embodiment, A system for communication has a receiver for receiving data from a passive transmitter capacitively coupled to the receiver. The receiver has a sensing element having a plurality of terminals configured to be capacitively coupled to the passive transmitter and DC isolated from the passive transmitter.
39 Citations
31 Claims
-
1. A system for communication comprising:
-
a receiver for receiving data from a passive transmitter capacitively coupled to the receiver via a isolation barrier, wherein the receiver comprises a sensing element having a first plurality of terminals configured to be capacitively coupled to the passive transmitter and DC isolated from the passive transmitter; a first terminal for sending a reference signal; and a second terminal for receiving an input signal, wherein a state of the passive transmitter is determined based on a transmission factor between the reference signal and the received input signal and comparing the transmission factor or portions of the transmission factor to a threshold. - View Dependent Claims (2, 3, 4)
-
-
5. A system for communication comprising:
-
a passive transmitter comprising a passive transmitting element comprising a second plurality of terminals capacitively coupled to a isolation barrier, the passive transmitter modulating an impedance between the second plurality of terminals according to a transmitted data value; and a receiver for receiving data from the passive transmitter capacitively coupled to the receiver via the isolation barrier, wherein the receiver comprises a sensing element having a first plurality of terminals configured to be capacitively coupled to the passive transmitter and DC isolated from the passive transmitter. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A semiconductor circuit for receiving data from a capacitively coupled passive transmitter, the circuit comprising:
-
a sensing element having a plurality of terminals configured to be capacitively coupled to the passive transmitter via a isolation barrier; and a data receiver coupled to an output of the sensing element, the data receiver receiving a stream of data from the sensing element, wherein the plurality of terminals of the sensing element comprise a first terminal and a second terminal, the sensing element measures an impedance between the first terminal and the second terminal, if the measured impedance exceeds a first threshold, a first data state is sent to the data receiver, and if the measured impedance does not exceed the first threshold, a second data state is sent to the data receiver. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A semiconductor circuit for receiving data from a capacitively coupled passive transmitter, the circuit comprising:
-
a sensing element having a plurality of terminals configured to be capacitively coupled to the passive transmitter via a isolation barrier; and a data receiver coupled to an output of the sensing element, the data receiver receiving a stream of data from the sensing element, wherein the sensing element comprises a first terminal, a second terminal, and a third terminal, the sensing element measures a first impedance between the first terminal and the second terminal, the sensing element measures a second impedance between the third terminal and the second terminal, if the first measured impedance is greater than the second measured impedance, a first data state is sent to the data receiver, and if the first measured impedance is not greater than the second measured impedance, a second data state is sent to the data receiver.
-
-
21. A method for receiving data from a passive transmitter through a isolation barrier, the method comprising:
-
measuring impedance between a plurality of terminals coupled to the isolation barrier; and determining a state of the passive transmitter based on the measured impedance. - View Dependent Claims (22, 23, 24)
-
-
25. A method of communicating across a isolation barrier, the method comprising:
-
transmitting data, wherein the transmitting comprises modulating an impedance coupled to a first portion of the isolation barrier, according to the data; and receiving the data, wherein the receiving comprises measuring an impedance of a second portion of the isolation barrier opposite the first portion. - View Dependent Claims (26, 27, 28)
-
-
29. A method for synchronously transferring data from one side of a capacitive isolation barrier to another other side of the isolation barrier, the method comprising:
-
transmitting a shift clock signal via a first signal path coupled to the isolation barrier; changing an impedance between at least two terminals of a second data path coupled to the isolation barrier according to data to be transmitted at one edge of the shift clock signal; and triggering a sensing element to evaluate the impedance at a second edge of the shift clock signal. - View Dependent Claims (30)
-
-
31. A semiconductor circuit for receiving data from a capacitively coupled passive transmitter, the circuit comprising:
-
a sensing element having a plurality of terminals configured to be coupled to the passive transmitter; a data receiver coupled to an output of the sensing element, the data receiver receiving a stream of data from the sensing element, wherein the sensing element comprises a first terminal, a second terminal, and a third terminal; the first terminal and the second terminal are configured to be coupled to a first side of the passive transmitter; the third terminal is configured to be coupled to a second side of the passive transmitter; the sensing element measures an impedance between the first terminal and the second terminal; the sensing element measures a second impedance between the first terminal and the third terminal; if a ratio of the first impedance to the second impedance is greater than a threshold, a first data state is sent to the data receiver; and if the ratio of the first impedance to the second impedance is not greater than the threshold, a second data state is sent to the data receiver.
-
Specification