Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Shin-ichi Tanimoto

Hirotsugu Fusayasu

Seiji Hamada

Ryo Matsubara

A signal transmitter apparatus generates three phase-shifted signals by shifting three transmission signals by predetermined phase shift amounts so that the phase shift amounts of the transmission signals are different from each other by 120 degrees. The signal transmitter apparatus generates three combined transmission signals and outputs the three combined transmission signals to the three transmission conductors, respectively, by combining each of pairs of the phase-shifted signals such that an inverted signal of a first phase-shifted signal is combined with a second phase-shifted signal, when each of the pairs of the phase-shifted signals includes the first and second phase-shifted signals among the three phase-shifted signals and phase shift amounts of the first and second phase-shifted signals are different from each other by 120 degrees. The signal receiver apparatus generates three receiving signals based on received three combined transmission signals, and detects the decoded signals of the transmission signals based on the receiving signals.

Signal transmission system for transmitting transmission signals via a transmission line including transmission conductors

A voltage memory stores a signal level of a transmission signal from a signal generator at a timing of a clock signal, and outputs the transmission signal. A voltage difference detector detects a signal level of a transmission signal at a timing subsequent to the timing and detects a first signal level difference between the signal level and the signal level from the voltage memory. A maximum value detector, a voltage difference detector and bias voltage sources delay the transmission signal so as to keep a rise time of the transmission signal substantially within a predetermined value range by adding capacitances corresponding to the first signal level differences from the voltage difference detectors to transmission lines.

Signal transmitter apparatus provided with signal correction circuit for suppressing radiation of electromagnetic waves between transmission lines

In a signal transmitter for a multiple differential transmission system including the signal transmitter, a signal receiver, and a signal transmission path including first to third signal lines, first to third differential driver transmit first to third output signals and inverted first to third output signals from the first to third output signals responsive to first to third bit information signals, the first output signal and the inverted third output signal are combined and transmitted to the first signal line, the second output signal and the inverted first output signal are combined and transmitted to the second signal line, and the third output signal and the inverted third output signal are combined and transmitted to the first signal line. The first to third differential drivers of the signal receiver detect polarities of terminal voltages generated across terminal resistances connected between adjacent signal lines and output bit information signals.

Multiple differential transmission system including signal transmitter and signal receiver connected via three signal lines

In a signal transmitter for a multiple differential transmission system including a signal transmitter and a signal receiver connected via three signal lines, first and second differential drivers generate first and second output signals of bipolar four values and having a first signal voltage level, and inverted first and second output signals, responsive to first and second bit information signals. A third differential driver generates a third output signal of bipolar four values having a second signal voltage level, and an inverted third output signal, responsive to a third bit information signal. The first output signal and the inverted third output signal are combined and transmitted to the first signal line, the second output signal and the inverted first output signal are combined and transmitted to the second signal line, and the third output signal and the inverted second output signal are combined and transmitted to the third signal line.

To provide a common mode radiation inhibit circuit for a differential transmission line which can inhibit quadratic common mode radiation by ensuring a continuity of grand level at a point of change of a signal grand, including a differential transmission line which is constituted of a pair of signal wiring, and transmits differential signals, signal grounds which are arranged along the differential transmission line, and each have a change point on its way, a transformer, and a reference ground, wherein a primary side of the transformer is connected between an electric midpoint of the pair of signal wiring, and the signal ground at one side of the front and back of the change point of the signal grounds, wherein the secondary side of the transformer is connected between the electric midpoint of the pair of signal wiring and the signal ground at another side of the front and back of the change point, and wherein the reference ground is connected to a point which becomes a neutral sheet of the primary side of the transformer and a point which becomes a neutral sheet of the secondary side of the transformer.

Growing community of inventors

Kyoto, Japan

Shin-ichi Tanimoto