Telephone and cordless telephone capable of suppressing spurious

Details Telephone and cordless telephone capable of suppressing spurious Telephone and cordless telephone capable of suppressing spurious

1995-09-25

1998-05-26

Bost, Dwayne

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455556, 455501, 379421, 379434, H04Q 700

Patent

active

057582920

ABSTRACT:
A cordless telephone includes at least one child unit and a mother unit. The mother unit transmits and receives a radio signal to and from the child unit. The mother unit includes first and second receiver circuits, a transmitter circuit, and a muting circuit. The first receiver circuit receives an UP-channel signal from the child unit and transmits the received signal to a telephone line. The transmitter circuit receives the signal transmitted via the telephone line from the counter party, and converts the signal received from the counter party into a DOWN-channel signal which will then be transmitted to the child unit. The second receiver circuit receives a broadcasting radio signal. The muting circuit mutes the output signal from the second receiver circuit. The muting circuit mutes the output signal derived from the second receiver circuit when either the UP-channel signal, or the DOWN-channel signal may give spurious interference to the second receiver circuit.

REFERENCES:
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patent: 4650928 (1987-03-01), Numata
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patent: 5095503 (1992-03-01), Kowalski
patent: 5128987 (1992-07-01), McDonough et al.
patent: 5233646 (1993-08-01), Kuromi
patent: 5243640 (1993-09-01), Hadley et al.
patent: 5420907 (1995-05-01), Shapiro
patent: 5537673 (1996-07-01), Nagashima et al.
patent: 5542102 (1996-07-01), Smith et al.

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