Multiple rate baseband receiver

Details Multiple rate baseband receiver Multiple rate baseband receiver

1984-02-23

1985-11-26

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

333 18, 370 84, H04B 314

Patent

active

045557888

ABSTRACT:
The present invention consists of a multirate data receiver which will recover data at any of N data rates with no predetermined restrictions on the value of N. The data rate at which the receiver operates is selected by a single 1-of-N switch selection. An equalizer section is constructed for each of the N data rates but are all controlled by the same (common) automatic adjustment circuitry, which controls gain and frequency compensation. The output from one of the equalizer sections is selected by an analog multiplexer constructed of field effect transistor (FET) switch circuits. The recovered waveforms from the equalizer sections are processed by common circuitry to recover the transmitted data. Clock recovery may be accomplished, for example, by a digital phase locked loop constructed such that the characteristics of the loop filters and divide-by-M feedback counters are easily modified by logical signals controlled by the 1-of-N switches.

REFERENCES:
patent: 2805398 (1957-09-01), Albersheim
patent: 3624539 (1971-11-01), Kao
patent: 3649916 (1972-03-01), Winters
patent: 3763359 (1973-10-01), Cho et al.

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