Frequency band dividing filter using delay-line filter

Details Frequency band dividing filter using delay-line filter Frequency band dividing filter using delay-line filter

1978-09-06

1980-12-09

Smith, Alfred E.

Wave transmission lines and networks

Plural channel systems

Having branched circuits

328139, 328165, 328167, 324 77E, H03H 746

Patent

active

042387442

ABSTRACT:
A frequency band dividing filter comprises a delay-line filter which is supplied with an input signal and produces a divided frequency band signal as an output, a circuit for deriving a delayed signal in which the input signal has been delayed by a predetermined amount of time, and a circuit for substantially performing subtraction of the delayed signal output signal of the delay-line filter, and producing another divided frequency band output signal. The delay-line filter comprises a plurality of delay circuits cascade connected, coefficient multipliers respectively supplied with the input signal and the output signal of the delay circuits and for multiplying specific coefficients to the signals thus supplied, and an adder for adding output signals of each of the coefficient multipliers.

REFERENCES:
patent: 3829798 (1974-08-01), Byram et al.
patent: 4137510 (1979-01-01), Iwahara

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