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US 6,150,846 AGranted
Bus circuit
AssigneeNEC Corporation
InventorFumihiko Sakamoto
Life of this patent
Estimating the term…
Abstract
A bus circuit of this invention has a bus line. A bus input circuit and a bus output circuit are connected to the bus line. The bus line is charged by a precharge circuit. The bus output circuit outputs an output signal to the bus line by discharging or not discharging potential of the bus line. The bus input circuit inputs a signal from the bus line. The bus input circuit includes a feedback circuit which inputs potential of the bus line as the signal, amplifies the signal in accordance with a change of the signal, and feeds back the amplified result to the bus line.
Claims18
A bus circuit comprising:
- a bi-directional bus line;
- a first circuit for outputting an output signal to or inputting an input signal from said bus line;
- and
- a second circuit provided in said first circuit, which receives a potential of said bus line, amplifies the received bus line potential in accordance with a change of said potential of said bus line, and feeds back the amplified result to said bus line.
1 more element
A bus circuit comprising:
- a bus line;
- a precharge circuit which charges a potential of said bus line:
- a bus output circuit which receives a data signal and outputs an output signal to said bus line by discharging or not discharging the potential of said bus line in accordance with said data signal;
- and
- a first circuit provided in said bus output circuit, for helping discharge the potential of said bus line when the potential of said bus line is discharged,
- wherein:
- said precharge circuit charges said potential of said bus line to a predetermined potential,
- said first circuit includes a second circuit for making a current path between said bus line and a power supply source whose potential is lower than said predetermined potential of said bus line, and
- said second circuit includes a first transistor which makes said current path, and a second transistor for controlling said first transistor when the potential of said bus line is reduced from said predetermined potential.
6 more elements
A bus circuit comprising:
- a bus line;
- a precharge circuit which charges a potential of said bus line;
- a bus input circuit receives a signal from said bus line and transfers said signal by discharging or not discharging the potential of said bus line;
- and
- a first circuit provided in said bus input circuit, for helping the potential of said bus line be discharged when the potential of said bus line is discharged
- wherein:
- said precharge circuit charges said potential of said bus line to a predetermined potential, and wherein said first circuit includes a second circuit for making a current path between said bus line and a power supply source whose potential is lower than said predetermined potential of said bus line, and
- said second circuit includes a first transistor which makes said current path, and a second transistor for controlling said first transistor when the potential of said bus line is reduced from said predetermined potential.
5 more elements
A bus circuit comprising:
- a bus line;
- a precharge circuit which charges a potential of said bus line;
- a bus output circuit which receives a data signal and outputs an output signal to said bus line by discharging or not discharging the potential of said bus line in accordance with said data signal;
- a bus input circuit which inputs said output signal from said bus line;
- first circuit provided in said output circuit, for helping the potential of said bus line be discharged when the potential of said bus line is discharged;
- and
- a second circuit provided in said input circuit, for helping the potential of said bus line discharge when said potential of said bus line is discharged.
4 more elements
A bus circuit comprising:
- a bi-directional bus line;
- a precharge circuit which charges a potential of said bus line;
- a bus input/output circuit which receives a data signal and outputs an output signal to said bus line by discharging or not discharging the potential of said bus line in accordance with said data signal, or inputs an input signal from said bus line;
- and
- a first circuit provided in said bus input/output circuit, for helping the potential of said bus line be discharged when the potential of said bus line is discharged.
2 more elements
Dependencies are inferred from the claim text.