KR970078130A - Transmission line connection circuit - Google Patents

Abstract

The present invention relates to a line connection circuit capable of preventing transmission performance from being weakened by forming a short-term direct current according to a line transmission code at an output terminal using an echo cancellation method that simultaneously performs transmission and reception, The connection circuit is a circuit for transmitting the transmission data through the transmission line or for recovering the line transmission pulse transmitted through the transmission line to the reception data. The connection circuit generates the transmission data as a predetermined line transmission pulse, Driving and receiving amplifying means; And a transformer disposed between the transmission line and the transmission drive and reception amplification means for matching the line impedance of the transmission line, the transformer having an output terminal connected to the transmission line and an input terminal connected to the transmission drive and reception amplification means And a voltage amplification inducing means at the input terminal.

Description

Transmission line connection circuit

Since this is a trivial issue, I did not include the contents of the text.

6 shows a line connection circuit to which a capacitance according to the present invention is added.

Claims (8)

A transmission line for transmitting transmission data through a transmission line or for recovering a line transmission pulse transmitted through the transmission line to reception data, the transmission data being generated by a predetermined line transmission pulse, Amplifying means (100); And a transformer located between the transmission line and the transmission drive and reception amplification means (100) for matching the line impedance of the transmission line, the transformer having an output connected to the transmission line and an output connected to the transmission drive and reception amplification means And a voltage amplification inducing means at the input terminal. The power amplifier according to claim 1, wherein the voltage amplification inducing means comprises a capacitor for inducing a parallel resonance having an inductance of the input terminal of the transformer and a predetermined resonant frequency, and changing an impedance with respect to a specific frequency band of the transmitted line signal A line connection circuit, The method of claim 2, wherein the inductance of the input terminals, the capacitance, the resonant frequency of the capacitor of the transformer is determined by the _{F resonant-freq = 1 / (} 2xPIx (L ic xC p) 1/2), where, F _{resonant-freq} is the resonant frequency (Hz), PI = 3.14159 ... , L _ic is the inductance value (Henry), and C _p is a capacitance value (Farad). 3. The method of claim 2, wherein when the resonance frequency is an under-shoot waveform for electrically inter-symbol interference, the resonance frequency of the parallel resonance is a frequency of the undershoot pulp Wherein the frequency converter is a primary frequency. 3. The method of claim 2, wherein, when the resonance frequency is to prevent distortion of the symbol of the line code of the transmission line to improve the reception capability, the resonance frequency is resonated to an odd harmonic frequency of the symbol frequency Is determined by the line connecting circuit. 3. The method of claim 2, wherein when the resonance frequency increases the reception amplification due to a DC component formed in the transmission line of the transmission line near the marginal point, And the line connecting circuit is connected to the line connecting circuit. The line connection circuit according to claim 1, wherein the transmission driving circuit is formed of discrete elements. The line connection circuit according to claim 1, wherein the transmission driving circuit is formed of an integrated circuit. ※ Note: It is disclosed by the contents of the first application.