Pulse synthesizing circuit
First Claim
1. A pulse synthesizing circuit for synthesizing a first one-bit digital signal and a second one-bit digital signal to generate a ternary signal, the circuit comprising:
- a logic circuit for outputting a first electric potential in a first case of a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal, outputting a second electric potential smaller than the first electric potential in a second case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combination in the first case, and outputting a third electric potential between the first electric potential and the second electric potential in a third case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combinations in the first case and the second case,whereinthe logic circuit outputs the first electric potential when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal is 0, outputs the second electric potential smaller than the first electric potential when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 1, and outputs the third electric potential between the first electric potential and the second electric potential when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal 1 or when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 0.
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Accused Products
Abstract
A circuit having versatility synthesizes one-bit digital signals to generate a ternary signal. The pulse synthesizing circuit synthesizes one-bit digital signals from two DFFs to generate a ternary signal. The pulse synthesizing circuit has a first NOR gate, a second NOR gate, a third NOR gate, and three switches. The first switch is connected to a first electric potential, the second switch is connected to a second electric potential, and the third switch is connected to a third electric potential. The first to third switches are turned on/off according to logical values of the signals from the two DFFs, and any of the first electric potential, the second electric potential, and the third electric potential is set as an output potential so that a ternary signal is generated.
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Citations
6 Claims
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1. A pulse synthesizing circuit for synthesizing a first one-bit digital signal and a second one-bit digital signal to generate a ternary signal, the circuit comprising:
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a logic circuit for outputting a first electric potential in a first case of a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal, outputting a second electric potential smaller than the first electric potential in a second case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combination in the first case, and outputting a third electric potential between the first electric potential and the second electric potential in a third case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combinations in the first case and the second case, wherein the logic circuit outputs the first electric potential when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal is 0, outputs the second electric potential smaller than the first electric potential when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 1, and outputs the third electric potential between the first electric potential and the second electric potential when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal 1 or when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 0. - View Dependent Claims (2, 3)
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4. A pulse synthesizing circuit for synthesizing a first one-bit digital signal and a second one-bit digital signal to generate a ternary signal, the circuit comprising:
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a logic circuit for outputting a first electric potential in a first case of a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal, outputting a second electric potential smaller than the first electric potential in a second case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combination in the first case, and outputting a third electric potential between the first electric potential and the second electric potential in a third case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combinations in the first case and the second case, wherein the logic circuit outputs the first electric potential when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal is 1, outputs the second electric potential smaller than the first electric potential when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 0, and outputs the third electric potential between the first electric potential and the second electric potential when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal is 0 or when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 1, the logic circuit includes a logical gate group and a switch group, the switch group includes a first switch connected to the first electric potential, a second switch connected to the second electric potential, and a third switch connected to the third electric potential, and the logical gate group outputs a control signal for turning on the first switch when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal is 1, outputs a control signal for turning on the second switch when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 0, and outputs a control signal for turning on the third switch when the logical value of the first one-bit digital signal is 1 and the logical value of the second one-bit digital signal is 0 or when the logical value of the first one-bit digital signal is 0 and the logical value of the second one-bit digital signal is 1. - View Dependent Claims (5)
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6. A pulse synthesizing circuit for synthesizing a first one-bit digital signal and a second one-bit digital signal to generate a ternary signal, the circuit comprising:
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a logic circuit for outputting a first electric potential in a first case of a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal, outputting a second electric potential smaller than the first electric potential in a second case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combination in the first case, and outputting a third electric potential between the first electric potential and the second electric potential in a third case where a combination of a logical value of the first one-bit digital signal and a logical value of the second one-bit digital signal is different from the combinations in the first case and the second case, wherein the first one-bit digital signal and the second one-bit digital signal are signals subjected to delta sigma modulation.
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Specification