Filter circuit composed of glass delay line with no coil

Details Filter circuit composed of glass delay line with no coil Filter circuit composed of glass delay line with no coil

1993-04-05

1995-01-03

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

333 32, 333214, 327553, H03K 500, H03H 738

Patent

active

053789474

ABSTRACT:
A filter circuit comprises a glass delay line for giving a predetermined amount of delay to an input signal, and an active filter connected to the glass delay line for performing an impedance matching for the glass delay line. By changing the transconductance g.sub.m of differential amplifiers which constitute the active filter, the amount of delay of the glass delay line can be adjusted.

REFERENCES:
patent: 3594593 (1971-07-01), Ho
patent: 3769603 (1973-10-01), Herchner
patent: 4074215 (1978-02-01), Rollett
patent: 4565962 (1986-01-01), Nagano
patent: 4734660 (1988-03-01), Izumida et al.
patent: 4760353 (1988-07-01), Perkins
patent: 4812785 (1989-03-01), Parker
patent: 5142254 (1992-08-01), Kimura
patent: 5192884 (1993-03-01), Kusano
patent: 5250917 (1993-10-01), Honda et al.
patent: 5267027 (1993-11-01), Ugaki et al.

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