TRACK CIRCUIT TRANSCEIVER
First Claim
1. A transceiver comprising:
- an H-bridge circuit comprising at least four switches;
a control unit in communication with the H-bridge circuit, the control unit being constructed and arranged to selectively drive the at least four switches to selectively cause the H-bridge circuit to function as a transmitter in a transmit mode or a receiver in a receive mode, wherein a combination of the switches selectively driven in the receive mode is different from a combination of the switches selectively driven in the transmit mode;
a power supply terminal in communication with the H-bridge circuit, the power supply terminal being constructed and arranged to connect to a power supply; and
a pair of track interface terminals in communication with the H-bridge circuit, the track interface terminals constructed and arranged to connect to a track interface cable so that the H-bridge circuit is capable of transmitting signals to and/or receiving signals from the track interface cable.
3 Assignments
0 Petitions
Accused Products
Abstract
Transceivers may be used in track circuits. A transceiver may comprise an H-bridge circuit comprising at least four switches. A control unit in communication with the H-bridge circuit may be constructed and arranged to selectively drive the at least four switches to selectively cause the H-bridge circuit to function as a transmitter or a receiver. A power supply terminal in communication with the H-bridge circuit may be constructed and arranged to connect to a power supply. A track interface terminal in communication with the H-bridge circuit may be constructed and arranged to connect to a track interface cable so that the H-bridge circuit is capable of transmitting signals to and/or receiving signals from the track interface cable.
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Citations
47 Claims
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1. A transceiver comprising:
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an H-bridge circuit comprising at least four switches; a control unit in communication with the H-bridge circuit, the control unit being constructed and arranged to selectively drive the at least four switches to selectively cause the H-bridge circuit to function as a transmitter in a transmit mode or a receiver in a receive mode, wherein a combination of the switches selectively driven in the receive mode is different from a combination of the switches selectively driven in the transmit mode; a power supply terminal in communication with the H-bridge circuit, the power supply terminal being constructed and arranged to connect to a power supply; and a pair of track interface terminals in communication with the H-bridge circuit, the track interface terminals constructed and arranged to connect to a track interface cable so that the H-bridge circuit is capable of transmitting signals to and/or receiving signals from the track interface cable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of operating a track circuit transceiver comprising:
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selecting an operational mode from a plurality of available operational modes, the plurality of operational modes comprising a receive mode and a transmit mode. selectively driving switches within an H-bridge circuit comprising at least four switches to cause the H-bridge circuit to function as a transmitter when the transmit mode is selected as the operational mode or a receiver when the receive mode is selected as the operational mode; wherein a combination of the switches selectively driven in the receive mode is different from a combination of the switches selectively driven in the transmit mode. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification