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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing a conventional 3way constant resistance dividing network, FIG. 2 is a circuit diagram showing an embodiment of
a dividing network according to the present invention, and FIG. It is a circuit diagram showing
other examples of this invention. 1, 2 · · · Input terminal, 3 · · · Takagi filter 4 · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Range filter, 9 ... Takagi filter, 10 ...
capacitor, 11 ... resistance, 3A, 3B, 4A, 4B, 5A, 5B ... output terminal. A) FIG. 1-59. FIG. 1- (b) FIG.
2 (b) FIG.
DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a dividing
network (dividing @) KllIL, which supplies band-divided electrical inputs to each band speaker of
the compound type speaker, particularly to a compound type speaker having three or more
channels. It relates to the dividing network to apply. O llil is a circuit diagram showing a
conventional constant resistance dividing network for 3-way), a shows a constant resistance
parallel type, and b shows a constant resistance series type. In a company, the output of the low
frequency amplifier is supplied to the terminal l,-terminal, and the high band noise s, tar? with
predetermined attenuation characteristics at the crossover (2)-par frequency is supplied to the?
Odd-field filters, low-pass filters i are connected in parallel, and a terminal l, a human-power
impedance seen from the side is set to be a constant resistance in the audio frequency band. And
each filter 3 ° furnace, S output terminal,? A, 3 II, Hiro A, see 11. jA and tl are respectively
connected with noiter, sni 1 to force, and wu convex − ′ \. On the other hand, at b, terminals l
and L are connected to each filter 3. '1. k connected in series. The above-mentioned parallel type
a can be used as the entire rounding of the constant voltage circuit configuration and a constant
loss () less circuit * r− can be used, it is less susceptible to the influence of the speaker
impedance, and the slow 74I can be relatively easily changed. Although it is bulky in mobility and
the tank circuit does not enter the series, it has multistage multi-way 1 and it also has the
advantage that it does not show resonance peak characteristics t etc., but it has a drawback of
current phase characteristics 1) l. On the other hand, 1-bC) series type has good current phase
characteristics because of constant current circuit #, but with multi-way, circuit elements with
many series insertion elements and less constant loss are required. Become or (I! (3) In the case
of ordinary circuit elements, the badness of damping of the sound quality side is the sacrifice 41.
Further, in the case of a multistage multi-way, a tank circuit portion is formed in series with a
band-pass filter, and resonance peaking appears in combination with the impedance
characteristic of the speaker. In addition, it is necessary to make a correction (to correction, L
component correction) to make the impedance characteristic of the speaker a pure resistance
component, the number of circuit elements increases, and the cost increases. Furthermore, the
slope chronic O change is not good and mobility is poor. As described above, in the conventional
dividing network, it is not possible to satisfy in terms of electrical characteristics and cost) in
series and even in parallel. So, this invention is overwhelmed by the above-mentioned problems,
and its summary is a series-parallel network combined with serial and parallel networks.
FIG. 2 is a circuit diagram showing an embodiment of a dividing network according to the
present invention. This figure is applied to a 3-in-one composite speaker, and in the case of a
filter with a negative-in-two-element type. In 閂-, the electrical frequency of the audio frequency
supplied between the terminals /, 1 is low, middle and high in the constant resistance parallel
network consisting of the 1 # filter and the high pass filter 7 Divided into 9 and the low band
company as O output to the woofer as it is, the middle and high band is further divided into the
middle and high band by the constant resistance series network consisting of the low band filter t
and the high band filter 9 The midrange is the output to the squawker and the highband is the
output to the tweeter. According to the above configuration, the low band forms a parallel type,
which is an advantage that the constant cost is low and the damping is good at the same cost,
and the middle and high band have an advantage of being a current phase by taking serial form
It can be 4 which has the characteristics and the feature that the sense of localization is good. In
addition, there is no occurrence of the co-pickup characteristic due to the tank circuit of the
band-pass filter. FIG. 3 is a circuit diagram showing another embodiment of the dividing network
according to the present invention. The difference from Fig. 2 is the constant resistance series
network, where λ) is composed of a single element filter. Note that the series-path between
capacitor 10 and resistor ii is a rounding correction circuit that corrects the impedance of the
woofer), and the constant setting for each element is the low-pass T loss over O reduction
characteristic 1! d) 10 at, and the attenuation characteristic of the high-pass / I spectrum is 1
6,617 oct. As apparent from the above description, in the dividing network according to the
present invention, the advantages of the serial network and the parallel network are combined,
and the superior effect of compensating for the defects of both networks is obtained. In the
embodiment, the present invention is applied to a 3-way complex type speaker, but the present
invention is not limited to the Kil type, but is applicable to a 3-way or more type. Also, although it
has been shown that the low band and the high band are serial networks, the low band and the
high band may be in series and the high band may be parallel to it.
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