Equalizing circuit and method for data communication terminal eq

Details Equalizing circuit and method for data communication terminal eq Equalizing circuit and method for data communication terminal eq

1996-07-12

1999-09-14

Pham, Chi H.

Pulse or digital communications

Equalizers

375230, 379390, 333 28R, H03H 730, H03H 500, H04M 100

Patent

active

059533730

ABSTRACT:
An equalizing circuit and method for data communication terminal equipment includes: a level detecting unit for detecting respective levels of a high frequency signal and a low frequency signal which are frequency shift keying signals inputted through a telephone line during a handshake and for outputting the detected respective levels; a control unit for comparing the levels of the high and low frequency signals detected by the level detecting unit and for generating a frequency compensation amplification control signal according to a level difference between the high and low frequency signals; and an equalizing unit for inputting a level detection signal outputted from the level detecting unit and for compensating any attenuation and distortion of received signals in response to the frequency compensation amplification control signal of the control unit, so as to effect equalization.

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Communucations, Computer Networks, and Open Systems (Fred Halsall, 1996, pp. 50-51).

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