Power line carrier communication chip established by utilizing singlechip

Abstract

The invention relates to a power line carrier communication chip established by utilizing a singlechip. The singlechip and an internal high-speed timer are utilized to generate digital frequency modulating signals, carrier signals are output through an IO interface, amplified by a carrier power amplifier and coupled with a power line; an frequency modulating receiver of carrier signal is MC3371 or MC 3372; a receiving band-pass filter is formed by a C2, a T2 and the like; a limiter circuit is formed by a D1 and a D2; a C5, a R3 and the like are used for receiving the amplified carrier signalswhich enters the 16th terminal of a U2 through a C6 for first frequency mixing; first local oscillation frequency coming from a carrier chip is input into the first terminal of the U2 after limited by a R12, and the signals after frequency selection are input into the fifth terminal of the U2 and then amplified in a first intermediate frequency amplifier; a second local oscillation frequency is fed in the eighth terminal of the U2 through a R10 and a R11, output from the ninth terminal after being filtered by an amplifier inside the U2, then input into the band-pass filter from the tenth terminal, output from the eleventh terminal after being filtered and amplified by a filter, and transmitted to an AD converter of a U1; and the intensity of received signal is output from the thirteenth terminal of the U2.

Description

technical field [0001] The invention is a power line carrier communication chip constructed by a single-chip microcomputer. Background technique [0002] With the improvement of power grid management requirements, the requirements for remote power data collection are becoming more and more urgent. Low-voltage power line carrier communication technology has been widely used, but the current carrier communication chips always have unsatisfactory shortcomings and deficiencies. Due to the use of dedicated integrated circuit design, the cost of carrier communication chips is high, or because the communication software is solidified in the chip , the user cannot expand the function, or the product quality is unstable due to the integration of too many hardware functions, or the supply is not timely, etc., forming a restrictive factor for the industrial users who use the carrier communication chip, which is not conducive to large-scale production, and more serious It is the core k...

AI Technical Summary

Problems solved by technology

Low-voltage power line carrier communication technology has been widely used, but the current carrier communication chips always have unsatisfactory shortcomings and deficiencies. Due to the use of dedicated integrated circuit design, the cost of carrier communication chips is high, or because the communication software is solidified in the chip , the user cannot expand the function, or the product quality is unstable due to the integration of too many hardware functions, or the supply is not timely, etc., forming a restrictive factor for the industrial users who use the carrier communication chip, which is not conducive to large-scale production, and more serious The core knowledge belongs to the carrier chip hardware provider, which is not conducive to the independent development of industrial users

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