FSK signal receiving device

Pulse or digital communications – Repeaters – Testing

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329303, H04L 2714

Patent

active

053735331

ABSTRACT:
An FSK signal receiving device is constituted by a first phase shifting circuit for applying a first phase shift to a first reception base band signal of first and second reception base band signals having orthogonal phases to generate a third base band signal, and generating a fourth base band signal having a phase orthogonal to the phase of the third base band signal, a second phase shifting circuit for applying the first phase shift to the second base band signal to generate a fifth reception base band signal, and a logical gate circuit for performing an exclusive OR operation on the third and fourth base band signals to obtain a first output signal, on the third and fifth base signals to obtain a second output signal, and on the first and second output signals to generate a detection signal.

REFERENCES:
patent: 4462107 (1984-07-01), Vance
patent: 4752742 (1988-06-01), Akaiwa
patent: 4870659 (1989-09-01), Oishi et al.

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