Portable information terminal device with radio selective-callin

Details Portable information terminal device with radio selective-callin Portable information terminal device with radio selective-callin

1997-05-14

1999-11-09

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455101, 455137, H04B 1702

Patent

active

059830867

ABSTRACT:
A portable information terminal device with a radio selective-calling receiver including first and second receiver sections with first and second antennas, respectively, implements an improvement of the reception sensitivity deterioration caused by the noise of a personal computer attached to the device with any increase of the dissipation current generated by the receiver maintained at a minimum. Only when the portable information terminal device is connected to the personal computer will it operate in a diversity reception mode to implement both receiving sections, improving reception sensitivity deterioration. When the portable information terminal device is not connected to the personal computer, diversity reception is not implemented, thus permitting only one of the receiving sections to receive.

REFERENCES:
patent: 5203018 (1993-04-01), Hirose
patent: 5448766 (1995-09-01), Sanning et al.
patent: 5546397 (1996-08-01), Mahany
patent: 5574981 (1996-11-01), Ahonen
patent: 5819182 (1998-10-01), Gardner et al.

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