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US 6,633,179 B1Granted
Bidirectional signal control circuit
AssigneeOki Electric Industry Co., Ltd.
InventorMitsunori Nakata
Life of this patent
Estimating the term…
Abstract
A wire used for transferring bidirectional signals is divided into a plurality of sub line segments. These sub line segments are classified into groups. Further, bidirectional buffers are provided between respective adjacent sub wires. The direction of transfer of a signal by each of the bidirectional buffers is controlled based on at least one of control signals used to control drivers for respectively outputting data signals to the sub line segments.
Claims12
A bidirectional signal control circuit, comprising:
- a plurality of conductive sub line segments for transferring bi-directional signals, said sub line segments being grouped into a first group, a second group, and an intermediate sub line segment placed between the first group and the second group, said first group including one or a plurality of sub line segments close to one another and said second group including the remaining sub line segments except for the intermediate sub line segment;
- a plurality of drivers respectively connected to corresponding ones of the sub line segments and for respectively transferring data signals to the sub line segments in response to one of a plurality of control signals;
- and
- a plurality of bidirectional buffers respectively placed between the sub line segments, the bidirectional buffers that are connected to the sub line segments included in the first group being respectively controlled so as to transfer signals in the direction of the intermediate sub line segment when data signals are respectively transferred to the sub line segments included in the first group through said drivers, and the bidirectional buffers that are connected to the sub line segments included in the second group being respectively controlled so as to transfer signals in the direction of the intermediate sub line segment when data signals are respectively transferred to the sub line segments included in the second group through said drivers.
1 more element
A bidirectional signaling circuit, comprising:
- first, second, and third conductor segments, the third conductor segment being disposed between the first and second conductor segments;
- a first tri-state driver having a data signal input terminal, a control signal input terminal, and an output terminal, the output terminal being coupled to the first conductor segment;
- a first bidirectional buffer having a data signal terminal that is coupled to the first conductor segment and having another data signal terminal that is coupled to the third conductor segment, the first bidirectional buffer also having a complimentary pair of control signal input terminals;
- first means, coupled to the control signal input terminal of the first tri-state driver, for supplying a first control signal to both of the complimentary pair of control signal input terminals of the first bidirectional buffer;
- a second tri-state driver having a data signal input terminal, a control signal input terminal, and an output terminal, the output terminal of the second tri-state buffer being coupled to the second conductor segment;
- a second bidirectional buffer having a data signal terminal that is coupled to the second conductor segment and having another data signal terminal that is coupled to the third conductor segment, the second bidirectional buffer also having a complimentary pair of control signal input terminals;
- and
- second means, coupled to the control signal input terminal of the second tri-state driver, for supplying a second control signal to both of the complimentary pair of control signal input terminals of the second bidirectional buffer,
- wherein the first bidirectional buffer transfers data signals from the first conductor segment to the third conductor segment when the first control signal is in a first digital state and transfers data signals from the third conductor segment to the first conductor segment when the first control signal is in a second digital state, and
- wherein the second bidirectional buffer transfers data signals from the second conductor segment to the third conductor segment when the second control signal is in the first digital state and transfers data signals from the third conductor segment to the second conductor segment when the second control signal is in the second digital state.
7 more elements
Dependencies are inferred from the claim text.