Bidirectional signal separation module for a bus converter
First Claim
1. A bidirectional signal separation module, comprising:
- a comparator comprising a first input node communicatively coupled to a bidirectional single-ended bus, a second input node communicatively coupled to a first voltage source, and an output node communicatively coupled to a unidirectional data transmission node; and
a resistive network comprising a first node communicatively coupled to a second voltage source, a second node communicatively coupled to said bidirectional single-ended bus, a third node communicatively coupled to ground, and a fourth node communicatively coupled to an electronic switch;
wherein said electronic switch is configured to alternately couple said fourth node of said resistive network to said second voltage source or ground according to a voltage level on a unidirectional data receiving node.
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Abstract
A bidirectional signal separation module includes a comparator having a first input node communicatively coupled to a bidirectional single-ended bus, a second input node communicatively coupled to a first voltage source, and an output node communicatively coupled to a unidirectional data transmission node; and a resistive network having a first node communicatively coupled to the second voltage source, a second node communicatively coupled to the bidirectional single-ended bus, a third node communicatively coupled to ground, and a fourth node communicatively coupled to an electronic switch. The electronic switch is configured to alternately couple the fourth node of the resistive network to the second voltage source or ground according to a voltage level on a unidirectional data receiving node.
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Citations
15 Claims
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1. A bidirectional signal separation module, comprising:
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a comparator comprising a first input node communicatively coupled to a bidirectional single-ended bus, a second input node communicatively coupled to a first voltage source, and an output node communicatively coupled to a unidirectional data transmission node; and a resistive network comprising a first node communicatively coupled to a second voltage source, a second node communicatively coupled to said bidirectional single-ended bus, a third node communicatively coupled to ground, and a fourth node communicatively coupled to an electronic switch; wherein said electronic switch is configured to alternately couple said fourth node of said resistive network to said second voltage source or ground according to a voltage level on a unidirectional data receiving node. - View Dependent Claims (2, 3, 4)
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5. A system for transmitting data between a bidirectional single-ended bus and a bidirectional differential bus, comprising:
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a bidirectional signal separation module communicatively coupled to said single-ended bus, said bidirectional signal separation module further comprising; a comparator configured to compare a voltage on said bidirectional single-ended bus to a threshold voltage and output a digital value representative of said comparison at a unidirectional output node; an electronic switch configured to selectively interconnect nodes of a resistive network to alternately output a digital high voltage or a digital low voltage to said bidirectional single-ended bus according to a voltage level on a unidirectional input node; and a differential transceiver configured to transmit data from said unidirectional output node over said differential bus and to transmit data received from said differential bus to said unidirectional input node. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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comparing a voltage level present on a bidirectional single-ended bus to a threshold voltage; transmitting a digital representation of said comparison from a differential signaling transceiver onto a differential bus; receiving data from said differential bus through said differential signaling transceiver; and selectively interconnecting nodes in a resistive network to alternately output a high or low voltage signal to said bidirectional single-ended bus according to data received from said differential bus. - View Dependent Claims (13, 14, 15)
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Specification