Signal isolator using micro-transformers
First Claim
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1. A logic signal isolator comprising:
- a micro-transformer with a primary winding and a secondary winding;
a transmitter circuit which drives the primary winding in response to a received input logic signal such that, in response to a first type of edge in the logic signal, at least a first non-zero amplitude signal is supplied to the primary winding and, in response to a second type of edge in the logic signal, a second different non-zero amplitude signal is supplied to the primary winding;
a receiver circuit receiving corresponding first non-zero amplitude and second non-zero amplitude signals from the secondary winding and reconstructing the received logic input signal from the received signals.
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Abstract
A logic signal isolator including a micro-transformer with a primary winding and a secondary winding. A transmitter circuit drives the primary winding in response to a received input logic signal such that, in response to a first type of edge in the logic signal, at least a first amplitude signal is supplied to the primary winding and, in response to a second type of edge in the logic signal, a second different amplitude signal is supplied to the primary winding. A receiver circuit receives corresponding first amplitude and second amplitude signals from the secondary winding and reconstructs the received logic input signal from the received signals.
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Citations
17 Claims
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1. A logic signal isolator comprising:
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a micro-transformer with a primary winding and a secondary winding; a transmitter circuit which drives the primary winding in response to a received input logic signal such that, in response to a first type of edge in the logic signal, at least a first non-zero amplitude signal is supplied to the primary winding and, in response to a second type of edge in the logic signal, a second different non-zero amplitude signal is supplied to the primary winding; a receiver circuit receiving corresponding first non-zero amplitude and second non-zero amplitude signals from the secondary winding and reconstructing the received logic input signal from the received signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A logic signal isolator comprising:
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a micro-transformer having a primary winding and a secondary winding; and a transmitter circuit comprising; an edge detection circuit, which in response to a first type of edge in the logic signal, a first edge detection signal is generated, and in response to a second type of edge in the logic signal, a second edge detection signal is generated, and a gate, having a first input tied to a first voltage source having a first magnitude and a second input tied to a second voltage source having a second magnitude, receiving the first edge detection signal at the first input and, in response, supplying a first signal having the first magnitude to the primary winding, and receiving the second edge detection signal at the second input and, in response, supplying a second signal having the second magnitude to the primary winding. - View Dependent Claims (10)
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11. A logic signal isolator comprising:
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a micro-transformer having a primary winding and a secondary winding; and a receiver circuit receiving, from the second winding, a first signal having a first non-zero amplitude and a second signal having a second non-zero amplitude corresponding to a signal input into the logic signal isolator, the receiver circuit further comprising; a first threshold detector connected to the secondary winding generating pulses in response to both the first non-zero amplitude and second non-zero amplitude signals, a second threshold detector connected to the secondary winding generating a pulse in response to the first non-zero amplitude signal, and a gate reconstructing the input signal based upon the pulses generated from the first threshold detector and the second threshold detector. - View Dependent Claims (12, 13)
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14. A logic signal isolator comprising:
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a micro-transformer having a primary winding and a secondary winding; a transmitter circuit comprising; an edge detection circuit, which in response to a first type of edge in the logic signal, a first edge detection signal is generated, and in response to a second type of edge in the logic signal, a second edge detection signal is generated, and a first gate, having a first input tied to a first voltage source having a first magnitude and a second input tied to a second voltage source having a second magnitude, receiving the first edge detection signal at the first input and, in response, supplying a first signal having the first magnitude to the primary winding, and receiving the second edge detection signal at the second input and, in response, supplying a second signal having the second magnitude to the primary winding; and a receiver circuit receiving, signals corresponding to the first and second signals from the secondary winding, the receiver circuit further comprising; a first threshold detector generating pulses in response to detecting either the first or second signals at the secondary windings, a second threshold detector generating a pulse in response to detecting the first signal at the secondary windings, and a second gate reconstructing the logic signal based upon the pulses generated from the first threshold detector and the second threshold detector. - View Dependent Claims (15, 16, 17)
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Specification