Bi-directional bus repeater
AssigneeNexperia B.V.
InventorsKatarzyna Nowak, Geethanadh Asam
Life of this patent
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Abstract
The present disclosure relates to a bi-directional bus repeater. The present disclosure further relates to a communication bus including a bi-directional bus repeater, and to a communication system including the communication bus. The bi-directional bus repeater includes a first input terminal, a second input terminal, a first pulldown element connected to the first input terminal, and a second pulldown element connected to the second input terminal. By ensuring that the activation of the first and second pulldown elements is dependent on the state of the corresponding input terminal and the detection of a high-to-low transition of the corresponding other input terminal, the problem of self-locking can be avoided or at least minimized.
Claims18
A bi-directional bus repeater comprising one or more repeater units, each repeater unit comprising:
- a first input terminal;
- a second input terminal;
- a first pulldown element for pulling down a voltage at the first terminal in response to a first control signal;
- a second pulldown element for pulling down a voltage at the second terminal in response to a second control signal;
- a first pulldown controller for providing the first control signal in dependence of a voltage at the second input terminal;
- a second pulldown controller for providing the second control signal in dependence of a voltage at the first input terminal;
- wherein the first pulldown controller comprises a first input connected to the first input terminal using a first connection and a second input connected to the second input terminal using a second connection;
- wherein the first pulldown controller is configured to provide the first control signal for activating the first pulldown element only after simultaneously detecting a high-to-low transition at its second input and a logical high at its first input;
- wherein the second pulldown controller comprises a first input connected to the second input terminal using a first connection and a second input connected to the first input terminal using a second connection;
- and
- wherein the second pulldown controller is configured to provide the second control signal for activating the second pulldown element only after simultaneously detecting a high-to-low transition at its second input and a logical high at its first input.
Dependencies are inferred from the claim text.