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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of
the present invention, FIG. 2 is a circuit diagram showing an example of a concrete
implementation circuit of FIG. 1, and FIG. 3 is a bass according to the present invention. The
mounting of the speaker shows the position, where a is a front view, b and C are a back view and
a side view, and FIG. 4 is a characteristic view for explaining the acoustic characteristics. 1.4 и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и left
speaker for the left channel, 6 и и и и speaker for the right channel, 7 и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и ... VCC only-[6 people 3-106 (Q) (b) ??
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a three-dimension
audio multiplex internal use telephonic receiver capable of expanding the reproduction
bandwidth of the low tone range in a limited space. Conventionally, in an audio multiplex built-in
type television receiver, the mounting on the speaker which can be attached to this has been the
largest in the space of the receiver and the restriction force on the tess и 12 round shape. For this
reason, the low frequency area is emphasized by the tone control and then the vibration area is
small, so the speaker's low frequency can not be sufficiently closed, and the vibration is felt. Plug
Q) Double ring low -Q no written raw rJ uncommon part. 'Because cancer is not a platform in the
point mentioned above in the X device, it is possible to realize all the power of the ultra-lowspeaker's back to the back of the receiver and to realize the entire size of the receiver as large as
before The purpose is to provide a pre-vision receiver capable of reproducing in a low-frequency
band 1 and a V-type (three-pronged tone system). In the following, according to the present
invention ?], tlJj3- also applies to all drawings. FIG. 1 shows a block diagram of the present
invention, wherein a left channel (Leh) audio signal input from the left input terminal passes a
bypass filter l, is amplified by an amplifier 2 and is configured to be driven by an Lch speaker
3vi. It is done. Similarly, the right channel (1'jeh) audio signal input from the right input terminal
passes through the i-pass filter 4, is amplified by the amplifier 5, and is configured to be driven
by the lch speaker 6t. On the other hand, the lch audio signal and the Rch audio signal are added
by an adder 7 composed of a resistor, amplified by an amplifier 9 through one low pass filter 8,
and configured to be driven by a bass speaker lO't-. FIG. 2d is an example of an implementation
circuit showing bypass filter 1, 4-low pass filter 8 and adder 7 in the block of FIG. 1; In FIG. 2, for
the Leh speech signal, transistor 11 and its emitter load resistor 12 are for low impedance
conversion by the emitter follower. The capacitors 13, 14 and t41 t15 -16 and the transistor
17tit12 (timber / octave) are bypass filters to obtain signal components having a continuous
disconnection frequency of 200 (Hz) or more. Here, in the capacitors W and WN connected in
series, both ends thereof are connected to the emitter of the transistor 11 and the base of the
transistor 17, and between the WN point of the capacitors 13 and 14 and the emitter of the
transistor 17 It is connected by resistance 15.
The collector of the transistor 17vC is connected at #VccttC, and the emitter grounded through
the resistor 16 is connected at the input terminal VC of the amplifier 2. The output of the
amplifier 2 is connected to the Lch speaker 3 so as to reproduce middle or higher bass. Is the
above-mentioned configuration for reproducing all mid-bass or more of l and ch audio signals
more than mid-bass of Rch audio signal? The structure 5'i for regeneration is equally cast 11 ░
6 ░, ie, transistors 18 and 0. The emitter load resistor 19 is for low impedance conversion by the
emitter follower as described above. Similarly, a bypass filter of a capacitor addition 21, a
resistance 23, 23 and a transistor 24d12 [decibel / octave] is constructed, and a VC of more than
200 Hz is achieved. In this bypass filter, it can be taken out from the emitter end of the so al
force rl) yy distam and becomes the input of the subsequent amplifier 50. The output of this
amplifier 5 is connected to the Reh speaker 6Vc, and is configured to reproduce middle or higher
bass. As described above, the configuration is exactly the same as that for the reproduction of the
middle and higher bass of the l and Ch audio signals. On the other hand, the l, ch speech signals
and Rch speech signals converted to low impedance by the above-mentioned emitter follower are
connected to be added via the respective resistors 24 and 25. The added output is resistors 27,
28. It is to be led to a low pass filter with a slope of 12 [decibel / octave] consisting of a grave, a
condenser, 31 and a transistor. In addition to this, it is for extracting a bass signal whose cutoff
frequency is 100 [: Hz] or less. 6- In the low-pass filter configuration part, the collector power
supply of the transistor blade is connected to ce # c. Each resistor connected in series with the
base of the transistor wing grounded via capacitor 31! ! It is arranged so that the added signal of
@d pi through 8 is obtained 7J11. Resistance 27. The connection point of the gate and the
emitter of the transistor 32 are connected by a capacitor. The emitter of the transistor 32 is
grounded via the emitter resistor 29 and also serves as the power end of the low pass filter. This
output is input to the amplifier 9, and the amplified .sigma.-output is configured to drive the bass
speaker 10 attached to the back of the receiver to reproduce the bass 1g fraction.
-Figure 6 (The attachment of the speaker is an external view showing the position ?, where the
figure (&) is a front view, and in the figures (b) and (e) is a back view and a side view; The
speaker 1- * shows an example of the position when attached. In the figure (aL), the reference
numeral 33 denotes a television receiver 7-, in which the left and right speakers 3, 4 are
disposed on both sides of the front Kri cathode ray tube at the housing. Further, an operation
member 36 such as a channel or a variable resistor for volume adjustment is disposed on the
front surface thereof. Further, in the figure (b) [in FIG., A reference sign 37ri is a face plate, and
the back face VC of a television receiver's turtle eyelid is attached to the watch face plate 37. A
speaker lO is disposed on the S-face plate 37 at the illustrated position. It is a cover which
protects a collar and a code | symbol 38 nifroon pipe socket, and the code | symbol 39 is a code
for lighting. Further, in l'jl (C), reference numeral 33rt TV Jyundo Shunsuke, 34 is a housing, 35ri
Fraun tube, 37 is a back plate. FIG. 4 shows a characteristic diagram of acoustic characteristics,
in which the abscissa represents frequency [Hz] and the ordinate represents sound pressure (dB)
t-. In this figure, the real art conventional one is broken #i! Is a draft of the ministry. The
operation of the above-described three-dimension audio multiplex collapsible television receiver
by the above-described pre-handling will be described based on the drawings. The Lch audio
signal is low inbi-eight-dance Kf converted by the emitter follower and appears at the emitter of
transistor 11. This output is a 12 [dB / octave] bypass filter composed of capacitors 13 and 14,
resistors 15 and 16, and a transistor 17, and an Lchii signal component above the cutoff
frequency 200 [:) lz] is taken out. The output is amplified by the amplifier 2 and the speaker 3 is
driven to reproduce lch (voice) and more than middle bass. Just as well, the RCh audio doublet is
converted to low impedance with the emitter follower and appears at the emitter of transistor 18.
This output is composed of a component yv: a + 21, resistors 22 and 23, and a transistor [z [the
decibel / octave] ?] bypass filter and an Rch voice frequency component higher than the cutoff
frequency of 200 Hz is taken out . The output is amplified by the amplifier 5 and the speaker 6 is
driven to reproduce all mid-bass or more of the Rch audio signal. On the other hand, each lch
audio signal and Rch audio signal converted to low impedance as described above are added at
each resistor and 26.
The added signal 9-is a low-pass filter having a slope of 12 [decibel / octave] composed of
resistors 2 '1, 28 and 29, capacitors (source), 31 and transistor wings, and the cutoff frequency is
lO [) 1z ) Only the following signal components are extracted. This output is amplified by an
amplifier 9 and driven to a bass speaker tube attached to the M side of the receiving machine to
reproduce bass. In the present invention, since the bass speaker is attached to the back of the
receiving machine, it is possible to attach one having an area larger than that of the conventional
c /). In order to reproduce the range between the cutoff frequencies of the low-pass filter and the
bypass filter, the difference between the cutoff frequencies of the two filters is not allowed to be
extremely large. So you have to consider 41 isolation of reflection. In the present invention, the
slope t of both filters. Choose i2 (Teschipel / Octave) K, keep the cut-off frequency of both filters
at least 1 octave and select the cut-off frequency k100 () lz of the low-pass filter or more) The
attachment of the reproduction speaker and the bass speaker substantially eliminates the
problem caused by the interference phenomenon and the phase difference between the two
cutoff frequencies based on the difference in position and direction. This effect is shown by the
sound 41114I shown in FIG. Here, it is shown that the present invention shown by the broken
line is superior to the conventional characteristics shown by the solid line in the bass region. As
described above, VC1 present invention 1cLh, a bass speaker having a larger effective area than
the conventional one can be corrected by the a-face vc11y attachment of the scratching machine,
and its position chemistries iC filter can be corrected by '0) [Tina6] , Has the effect of increasing
the handwriting effect in the bass region.
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