Logic isolator
DCFirst Claim
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1. A method of providing isolation for logic signals comprising:
- receiving a control or status logic signal with logical transitions between a first state and a second state and providing in response thereto, to an isolation barrier, separate first and second signals indicative of said transitions;
receiving from the isolation barrier third and fourth signals corresponding to the first and second signals;
providing, from the received third and fourth signals an output status of control signal indicating the logical transitions of the received control or status logic signal; and
receiving, with a bistable device, from the providing means, the output status or control signal.
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Abstract
A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.
152 Citations
23 Claims
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1. A method of providing isolation for logic signals comprising:
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receiving a control or status logic signal with logical transitions between a first state and a second state and providing in response thereto, to an isolation barrier, separate first and second signals indicative of said transitions;
receiving from the isolation barrier third and fourth signals corresponding to the first and second signals;
providing, from the received third and fourth signals an output status of control signal indicating the logical transitions of the received control or status logic signal; and
receiving, with a bistable device, from the providing means, the output status or control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of for transmitting a status or control logic signal across an isolation barrier comprising:
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receiving the status or control signal which includes a first transition from a first state to a second state and a second transition from the second state to the first state;
transmitting to the isolation barrier a short signal to indicate the first transition; and
receiving from the isolation barrier the short signal and using the short signal to provide an output indicating the occurrence of the first transitions. - View Dependent Claims (13, 14)
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15. A logic isolation method comprising:
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forming on a chip including a substrate an isolation barrier including a first coil formed on the chip, a dielectric shield over the first coil, and a second coil over the dielectric;
receiving a control or status logic signal that includes a first transition from a first state to a second state and a second transition from the second state to the first state, and transmitting to the isolation barrier signals indicative of the transitions; and
receiving from the isolation barrier the signals indicative of the transitions and using said signals to provide an output signal indicating the transitions. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification