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US 2008/0258136 A1Published application
Logic Circuit
AssigneeFuji Electric Holdings Co., Ltd.
InventorHaruo Kawakami
Life of this patent
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Abstract
The invention includes a two terminal switching device having two stable resistivity values for each applied voltage, which when a voltage of not more than a first threshold voltage (Vth1) is applied, becomes in a first state having a higher resistivity, whereas when a larger second threshold voltage (Vth2) or more is applied, becomes in a second state having a lower resistivity; a resistance connected in series to the switching device; a terminal for applying a bias voltage (Vt) to both ends of a series circuit of the switching device and the resistance; a first pulse inputting terminal; and a second pulse inputting terminal. The invention provides a simple realization of a flip-flop circuit for a sequential logic circuit.
Claims12
A logic circuit, comprising:
- a switching device having two stable resistivity values for each applied voltage value, which when a voltage of not more than a prescribed first threshold voltage is applied thereto, becomes in a first state having a higher resistivity value of the respective resistivity values, and when a voltage of a prescribed second threshold voltage or more that is larger than the first threshold voltage is applied thereto, becomes in a second state having a lower resistivity value of the respective resistivity values, the switching device having a first and a second end;
- a resistance device connected to the second end of the switching device to form a series circuit;
- a bias terminal for applying a prescribed bias voltage to both ends of the series circuit of the switching device and the resistance device;
- a first pulse inputting terminal for inputting a first pulse of a first prescribed voltage to the first end of the switching device;
- and
- a second pulse inputting terminal for inputting a second pulse of a second prescribed voltage to a connection between the second end of the switching device and the resistance device,
- the first and second states being selectively generated in the switching device by a combination of inputs of the first and second pulses.
4 more elements
A logic circuit, including:
- a first two terminal switching device having two stable resistivity values for each applied voltage value, which when a voltage of not more than a prescribed first threshold voltage is applied thereto, becomes in a first state having a higher resistivity value of the respective resistivity values, and when a voltage of a prescribed second threshold voltage or more that is larger than the first threshold voltage is applied thereto, becomes in a second state having a lower resistivity value of the respective resistivity values;
- a second two terminal switching device having electric characteristics the same as in the first switching device and being connected in series therewith in a direction with uniform polarity to the first two terminal switching device, to form a series circuit with first and second ends;
- a terminal for applying a prescribed bias voltage to both the first and second ends of the series circuit of the first and second switching devices;
- a first pulse inputting terminal for inputting a first pulse of a first prescribed voltage to the first end of the series circuit of the first and second switching devices;
- a second pulse inputting terminal for inputting a second pulse of a second prescribed voltage in a connection between the first and second switching devices;
- and
- a third pulse inputting terminal for inputting a third pulse of a third prescribed voltage to the second end of the series circuit of the first and second switching devices,
- the first and second states being selectively generated in the first and second switching devices by a combination of inputs of the first, second and third pulses.
5 more elements
A logic circuit, including:
- a first two terminal switching device having two stable resistivity values for each applied voltage value, which when a voltage of not more than a prescribed first threshold voltage is applied thereto, becomes in a first state having a higher resistivity value of the respective resistivity values, and when a voltage of a prescribed second threshold voltage or more that is larger than the first threshold voltage is applied thereto, becomes in a second state having a lower resistivity value of the respective resistivity values;
- a second two terminal switching device having electric characteristics the same as in the first switching device and being connected in series in a direction with uniform polarity to the first two terminal switching device, to form a series circuit with first and second ends;
- a terminal for applying a prescribed bias voltage to both the first and second ends of the series circuit of the first and second switching devices;
- a first pulse inputting terminal for inputting a first pulse of a first prescribed voltage to both the first and second ends of the series circuit of the first and second switching devices;
- and
- a second pulse inputting terminal for inputting a second pulse of a second prescribed voltage to a connection between the first and second switching devices,
- the first and second states being selectively generated in the first and second switching devices by a combination of inputs of the first and second pulses.
4 more elements
Dependencies are inferred from the claim text.