Method and apparatus for optimizing signal transformation in a frame-based communications network
View Patent ↗A method of and apparatus for optimizing signal transformation from a twisted pair transmission line to a combination transmitter and receiver for a frame-based communications network, the transmitter having a transmit output pair port for transmitting signals onto the frame-based communications network over the twisted pair transmission line, the receiver having a receive input pair port for receiving signals from the frame-based communications network over the twisted pair transmission line. A transformer is coupled between the twisted pair transmission line and each of the transmit output pair port and the receive input pair port. The transformer has a coil across the twisted pair, a transmit coil across the transmit output pair port, and a receive coil across the receive input pair port. A transfer ratio between the transmit coil and the coil across the twisted pair is optimized for transmitting signals. A transfer ratio between the receive coil and the coil across the twisted pair is optimized for receiving signals.
1. A method of optimizing signal transformation from a twisted pair transmission line to a combination transmitter and receiver for a frame-based communications network, the transmitter having a transmit output pair port for transmitting signals onto the frame-based communications network over the twisted pair transmission line, the receiver having a receive input pair port for receiving signals from the frame-based communications network over the twisted pair transmission line, the method comprising:
coupling a transformer between the twisted pair transmission line and each of the transmit output pair port and the receive input pair port, the transformer having a coil across the twisted pair, a transmit coil across the transmit output pair port, and a receive coil across the receive input pair port,
wherein a turns ratio between the transmit coil and the coil across the twisted pair is designated wt:1,
wherein a turns ratio between the receive coil and the coil across the twisted pair is designated wr:1, and wherein wr>wt.
2. The method of claim 1 , wherein the twisted pair transmission line is a telephone line having a tip line and a ring line.
3. The method of claim 1 , wherein a wr:wt ratio falls within a range from greater than 1 to 4.
4. A transformer apparatus for optimizing signal transformation from a twisted pair transmission line to a combination transmitter and receiver for a frame-based communications network, the transmitter having a transmit output pair port for transmitting signals onto the frame-based communications network over the twisted pair transmission line, the receiver having a receive input pair port for receiving signals from the frame-based communications network over the twisted pair transmission line, comprising:
a coil across the twisted pair transmission line;
a transmit coil across the transmit output pair port; and
a receive coil across the receive input pair port,
wherein a turns ratio between the transmit coil and the coil across the twisted pair is designated wt:1,
wherein a turns ratio between the receive coil and the coil across the twisted pair is designated wr:1, and
wherein wr>wt.
5. The transformer apparatus of claim 4 , wherein the twisted pair transmission line is a telephone line having a tip line and a ring line.
6. The transformer apparatus of claim 4 , wherein a wr:wt ratio falls within a range from greater than 1 to 4.