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US 8,798,568 B2Granted
Signal transmission method, transmission circuit and apparatus
AssigneeFujitsu Limited
InventorMasaya Kibune
Life of this patent
Estimating the term…
Abstract
A signal transmission method suppresses a reflected wave of a transmission signal on a transmission line, by obtaining level and time information related to the reflected wave by computing a correlation between a data pattern of the transmission signal and the reflected wave, and correcting a waveform of the transmission signal based on the level and time information related to the reflected wave.
Claims20
A signal transmission method for suppressing a reflected wave of a transmission signal on a transmitting end of a transmission line, comprising:
- receiving the transmission signal to be transmitted to the transmission line by a terminal;
- extracting the reflected wave by a hybrid circuit that is coupled to the transmission line;
- obtaining, by a control circuit that is coupled to the hybrid circuit and the terminal and receives the reflected wave extracted at the hybrid circuit and the transmission signal received at the terminal, level and time information related to the reflected wave by computing a correlation between a data pattern of the transmission signal received at the terminal and the reflected wave extracted at the hybrid circuit;
- correcting, by a correcting circuit that is coupled to the terminal and the control circuit and receives the transmission signal received at the terminal and the level and time information obtained at the control circuit, a waveform of the transmission signal received at the terminal based on the level and time information obtained at the control circuit in order to minimize the correlation;
- and
- minimizing the correlation at the control circuit by variably controlling a parameter of the hybrid circuit.
3 more elements
A signal transmission circuit for suppressing a reflected wave of a transmission signal on a transmitting end of a transmission line, comprising:
- a terminal configured to receive the transmission signal to be transmitted to the transmission line;
- a hybrid circuit coupled to the transmission line and configured to extract the reflected wave of the transmission signal;
- a control circuit, coupled to the hybrid circuit and the terminal, configured to receive the reflected wave extracted by the hybrid circuit and the transmission signal received by the terminal, and to obtain level and time information related to the reflected wave by computing a correlation between a data pattern of the transmission signal received by the terminal and the reflected wave extracted by the hybrid circuit;
- and
- a correcting circuit, coupled to the terminal and the control circuit, configured to receive the transmission signal received by the terminal and the level and time information obtained by the control circuit, and to correct a waveform of the transmission signal received by the terminal based on the level and time information obtained by the control circuit in order to minimize the correlation,
- wherein the control circuit minimizes the correlation by variably controlling a parameter of the hybrid circuit.
3 more elements
A semiconductor device comprising:
- a signal transmission circuit configured to suppress a reflected wave of a transmission signal on a transmitting end of a transmission line,
- the signal transmission circuit including:
- a terminal configured to receive the transmission signal to be transmitted to the transmission line;
- a hybrid circuit coupled to the transmission line and configured to extract the reflected wave of the transmission signal;
- a control circuit, coupled to the hybrid circuit and the terminal, configured to receive the reflected wave extracted by the hybrid circuit and the transmission signal received by the terminal, and to obtain level and time information related to the reflected wave by computing a correlation between a data pattern of the transmission signal received by the terminal and the reflected wave extracted by the hybrid circuit;
- and
- a correcting circuit, coupled to the terminal and the control circuit, and configured to correct a waveform of the transmission signal received by the terminal based on the level and time information obtained by the control circuit in order to minimize the correlation,
- wherein the control circuit minimizes the correlation by variably controlling a parameter of the hybrid circuit.
5 more elements
Dependencies are inferred from the claim text.