Wave transmission lines and networks – Coupling networks – Delay lines including a lumped parameter
Patent
1981-02-23
1983-03-01
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Delay lines including a lumped parameter
333166, H03H 718, H03H 730
Patent
active
043756239
ABSTRACT:
An arrangement for the transmission of audio signals, comprising a delay line (1) provided with 5, 7 or 9 tappings situated at equal time intervals along the delay line. The tappings are each connected to a common adding circuit (16) via an amplitude control device (9 to 13). The ratios between the amplitudes of the output signals of the amplitude control devices, viewed from one end of the delay line (1) to the other end are 1:2n:2n.sup.2 :-2n:1 for five tappings, 1:2n:2n.sup.2 :n.sup.3 -n:-2n.sup.2 :2n:-1 for seven tappings, and 1:2n:2n.sup.2 :n.sup.3 -n:1/4(n.sup.4 -1)-2n.sup.2 :-(n.sup.3 -n):2n.sup.2 :-2n:1 for nine tappings. This yields an arrangement having a flat frequency response from the input (2) to the output (15). The invention also relates to a plurality of delay lines (for example 31 to 35) connected in series and to a reverberation unit provided with such a transmission arrangement.
REFERENCES:
patent: 3829798 (1974-08-01), Byram et al.
patent: 3860892 (1975-01-01), Speiser et al.
de Haan, administrator by Friedrich J.
Dijkmans Eise C.
Franssen, deceased Nico V.
Geelen Mathias H.
Immink Kornelis A.
Franzblau Bernard
Mayer Robert T.
Nussbaum Marvin L.
U.S. Philips Corporation
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