Filter switching circuit

Details Filter switching circuit Filter switching circuit

1994-05-25

1996-03-12

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455307, 455339, H04B 116

Patent

active

054993946

ABSTRACT:
A filter switching circuit for switching between two or more filters. The filter switching circuit may be integrally formed upon an integrated circuit chip and may be advantageously utilized as a portion of a dual bandwidth receiver, such as employed in a radiotelephone, operable to receive both narrowband and wideband signals.

REFERENCES:
patent: 3769604 (1973-10-01), Atkinson
patent: 4081771 (1978-03-01), Hendrickson
patent: 4124817 (1978-11-01), Takahashi
patent: 4352208 (1982-09-01), Schroeder
patent: 4356567 (1982-10-01), Eguchi et al.
patent: 4896374 (1990-01-01), Waugh et al.
patent: 4972455 (1990-11-01), Phillips et al.
patent: 4991226 (1991-02-01), Bongiorno
patent: 5020147 (1991-05-01), Okanobu
patent: 5023939 (1991-06-01), Hori
Robert Boylestad, "Electronic Devices and Circuit Theory", 1987, pp. 610-622.

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