ANALOGUE FRONT END CIRCUIT OVER TELEPHONE LINES FOR HIGH BIT RATE DATA TRANSFER

摘要

1. TECHNICAL FIELD OF THE INVENTION;The present invention relates to an analog termination device for high speed data transmission and reception on a telephone line.;2. The technical problem to be solved by the invention;An object of the present invention is to provide an analog termination device that can be used simultaneously for an optical termination device and a subscriber station device by replacing a filter by configuring a circuit having a common structure.;3. Summary of Solution to Invention;In the present invention, the existing high speed subscriber analog termination device using a telephone line is composed of circuits different from the network side and the subscriber side, so that the gain of the analog signal received from the subscriber side is adjusted using a programmable gain adjuster and the same gain adjustment parameter is adjusted. On the other hand, the error of signal interference on the line is minimized by adjusting the reception gain with the programmable gain amplifier on the receiving side.;4. Important uses of the invention;The present invention is used for the optical termination device and subscriber terminal device on the telephone line.