AC coupled transmission circuit and system
First Claim
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1. A transmission circuit configured to transmit a transmitting signal to a reception circuit through a transmitting AC coupling element, the reception circuit receiving a reception signal through a receiving AC coupling element, the transmitting AC coupling element being AC coupled to the receiving AC coupling element, the transmission circuit comprising:
- a drive signal generation circuit configured to generate a drive signal in synchronization with a transmission signal to be transmitted; and
a drive circuit configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance, and apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period, whereinthe drive circuit comprises;
a first switching element comprising one end to which a first voltage is supplied and an other end connected to one end of the transmitting AC coupling element;
a second switching element comprising one end to which a second voltage is supplied and an other end connected to the one end of the transmitting AC coupling element;
a third switching element comprising one end to which the first voltage is supplied and an other end connected to an other end of the transmitting AC coupling element;
a fourth switching element comprising one end to which the second voltage is supplied and an other end connected to the other end of the transmitting AC coupling element;
a first impedance element connected between the one end and the other end of the first switching element;
a second impedance element connected between the one end and the other end of the second switching element;
a third impedance element connected between the one end and the other end of the third switching element; and
a fourth impedance element connected between the one end and the other end of the fourth switching element,the drive signal generation circuit makes the first and fourth switching elements or the second and third switching elements conductive during the driving period and causes the drive current to flow, andthe drive signal generation circuit makes, after the driving period, the first to fourth switching elements conductive and applies the applied voltage to both of the ends of the transmitting AC coupling element, and then makes the first to fourth switching elements non-conductive and applies a voltage between the first voltage and the second voltage, to both of the ends of the transmitting AC coupling element.
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Abstract
According to an embodiment, a transmission circuit is configured to transmit a signal to a reception circuit through a transmitting AC coupling element. The transmitting AC coupling element is AC coupled to a receiving AC coupling element. The transmission circuit includes a drive signal generation circuit and a drive circuit. The drive signal generation circuit is configured to generate a drive signal in synchronization with a transmission signal to be transmitted. The drive circuit is configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance. The drive circuit is configured to apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period.
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Citations
20 Claims
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1. A transmission circuit configured to transmit a transmitting signal to a reception circuit through a transmitting AC coupling element, the reception circuit receiving a reception signal through a receiving AC coupling element, the transmitting AC coupling element being AC coupled to the receiving AC coupling element, the transmission circuit comprising:
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a drive signal generation circuit configured to generate a drive signal in synchronization with a transmission signal to be transmitted; and a drive circuit configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance, and apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period, wherein the drive circuit comprises; a first switching element comprising one end to which a first voltage is supplied and an other end connected to one end of the transmitting AC coupling element; a second switching element comprising one end to which a second voltage is supplied and an other end connected to the one end of the transmitting AC coupling element; a third switching element comprising one end to which the first voltage is supplied and an other end connected to an other end of the transmitting AC coupling element; a fourth switching element comprising one end to which the second voltage is supplied and an other end connected to the other end of the transmitting AC coupling element; a first impedance element connected between the one end and the other end of the first switching element; a second impedance element connected between the one end and the other end of the second switching element; a third impedance element connected between the one end and the other end of the third switching element; and a fourth impedance element connected between the one end and the other end of the fourth switching element, the drive signal generation circuit makes the first and fourth switching elements or the second and third switching elements conductive during the driving period and causes the drive current to flow, and the drive signal generation circuit makes, after the driving period, the first to fourth switching elements conductive and applies the applied voltage to both of the ends of the transmitting AC coupling element, and then makes the first to fourth switching elements non-conductive and applies a voltage between the first voltage and the second voltage, to both of the ends of the transmitting AC coupling element. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transmission circuit configured to transmit a transmitting signal to a reception circuit through a transmitting AC coupling element, the reception circuit receiving a reception signal through a receiving AC coupling element, the transmitting AC coupling element being AC coupled to the receiving AC coupling element, the transmission circuit comprising:
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a drive signal generation circuit configured to generate a drive signal in synchronization with a transmission signal to be transmitted; and a drive circuit configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance, and apply an applied voltage to both of the ends of the transmitting AC coupling element after the driving period, wherein the drive circuit comprises; a first switching element comprising one end to which a first voltage is supplied and an other end connected to one end of the transmitting AC coupling element; a second switching element comprising one end to which a second voltage is supplied and an other end connected to the one end of the transmitting AC coupling element; a third switching element comprising one end to which the first voltage is supplied and an other end connected to an other end of the transmitting AC coupling element; and a fourth switching element comprising one end to which the second voltage is supplied and an other end connected to the other end of the transmitting AC coupling element, the first to fourth switching elements are transistors, the drive signal generation circuit decreases each impedance of the first and fourth switching elements or the second and third switching elements during the driving period and causes the drive current to flow, and the drive signal generation circuit decreases, after the driving period, each impedance of the first to fourth switching elements and applies the applied voltage to both of the ends of the transmitting AC coupling element, the applied voltage being a voltage between the first voltage and the second voltage, and then increases each impedance of the first to fourth switching elements and applies another voltage between the first voltage and the second voltage, to both of the ends of the transmitting AC coupling element. - View Dependent Claims (8, 9)
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10. A communication system comprising:
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a transmitting AC coupling element; a transmission circuit configured to transmit a transmitting signal through the transmitting AC coupling element; a receiving AC coupling element to be AC coupled to the transmitting AC coupling element; and a reception circuit configured to receive a reception signal through the receiving AC coupling element, wherein the transmission circuit comprises; a drive signal generation circuit configured to generate a drive signal in synchronization with a transmission signal to be transmitted; and a drive circuit configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance, and supplies, after the driving period, an applied voltage to both of the ends of the transmitting AC coupling element, the reception circuit comprises a hysteresis circuit having hysteresis characteristics and configured to output a second reception signal in response to a first reception signal received by the receiving AC coupling element, and a logic of the second reception signal during standby is different from a logic of an initial value of the transmission signal, wherein the drive circuit comprises; a first switching element comprising one end to which a first voltage is supplied and an other end connected to one end of the transmitting AC coupling element; a second switching element comprising one end to which a second voltage is supplied and an other end connected to the one end of the transmitting AC coupling element; a third switching element comprising one end to which the first voltage is supplied and an other end connected to an other end of the transmitting AC coupling element; a fourth switching element comprising one end to which the second voltage is supplied and an other end connected to the other end of the transmitting AC coupling element; a first impedance element connected between the one end and the other end of the first switching element; a second impedance element connected between the one end and the other end of the second switching element; a third impedance element connected between the one end and the other end of the third switching element; and a fourth impedance element connected between the one end and the other end of the fourth switching element, the drive signal generation circuit makes the first and fourth switching elements or the second and third switching elements conductive during the driving period and causes the drive current to flow, and the drive signal generation circuit makes, after the driving period, the first to fourth switching elements conductive and applies the applied voltage to both of the ends of the transmitting AC coupling element, and then makes the first to fourth switching elements non-conductive and applies a voltage between the first voltage and the second voltage, to both of the ends of the transmitting AC coupling element. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A communication system comprising:
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a transmitting AC coupling element; a transmission circuit configured to transmit a transmitting signal through the transmitting AC coupling element; a receiving AC coupling element to be AC coupled to the transmitting AC coupling element; and a reception circuit configured to receive a reception signal through the receiving AC coupling element, wherein the transmission circuit comprises; a drive signal generation circuit configured to generate a drive signal in synchronization with a transmission signal to be transmitted; and a drive circuit configured to cause, in response to the drive signal, a drive current to flow between both ends of the transmitting AC coupling element in synchronization with a rising edge and a falling edge of the transmission signal during a driving period set in advance, and supplies, after the driving period, an applied voltage to both of the ends of the transmitting AC coupling element, the reception circuit comprises a hysteresis circuit having hysteresis characteristics and configured to output a second reception signal in response to a first reception signal received by the receiving AC coupling element, and a logic of the second reception signal during standby is different from a logic of an initial value of the transmission signal, wherein the drive circuit comprises; a first switching element comprising one end to which a first voltage is supplied and an other end connected to one end of the transmitting AC coupling element; a second switching element comprising one end to which a second voltage is supplied and an other end connected to the one end of the transmitting AC coupling element; a third switching element comprising one end to which the first voltage is supplied and an other end connected to an other end of the transmitting AC coupling element; and a fourth switching element comprising one end to which the second voltage is supplied and an other end connected to the other end of the transmitting AC coupling element, the first to fourth switching elements are transistors, the drive signal generation circuit decreases each impedance of the first and fourth switching elements or the second and third switching elements during the driving period and causes the drive current to flow, and the drive signal generation circuit decreases, after the driving period, each impedance of the first to fourth switching elements and applies the applied voltage to both of the ends of the transmitting AC coupling element, the applied voltage being a voltage between the first voltage and the second voltage, and then increases each impedance of the first to fourth switching elements and applies another voltage between the first voltage and the second voltage, to both of the ends of the transmitting AC coupling element. - View Dependent Claims (17, 18, 19, 20)
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Specification
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Current AssigneeKioxia Corporation
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Original AssigneeKabushiki Kaisha Toshiba (Toshiba Corporation)
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InventorsNakatsuka, Shinji, Fujii, Shinsuke
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Primary Examiner(s)Koeth, Michelle M
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Application NumberUS14/845,324Publication NumberTime in Patent Office578 DaysField of SearchUS Class CurrentCPC Class CodesH01F 38/14 Inductive couplings for wir...H04B 1/0475 with means for limiting noi...H04B 1/16 CircuitsH04B 5/24 Inductive couplingH04L 25/0272 Arrangements for coupling t...H04L 25/4902 Pulse width modulation; Pul...Y02D 30/70 in wireless communication n...
