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JPS594299

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DESCRIPTION JPS594299
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electrostatic speaker, and more particularly to an electrostatic speaker which can directly input a
digital signal consisting of PCM pulses obtained by quantizing an analog signal and reproduce it
as an analog signal. The configuration of the conventional example and its problems Generally, a
speaker for directly inputting a digital signal consisting of PCM pulses obtained by quantizing an
analog signal and reproducing an audio signal includes a plurality of voice coils and a plurality of
excitation circuits wound, and a plurality of speakers It is known that one using the speaker unit
of However, in practice, it takes time and effort to wind the coil only a few bits for
manufacturing, and the magnetic gear knob becomes large and the efficiency decline can not be
avoided, and the narrowing of the winding to narrow the magnetic gear knob makes it difficult to
input It has the drawback of becoming smaller. On the other hand, in the case of using a plurality
of units, each uni, l, has an exceptional super-twist, which is difficult to realize, or has a drawback
that the distortion becomes large. SUMMARY OF THE INVENTION The present invention solves
such conventional drawbacks, and as a speaker that can directly input a PCM pulse signal, it
corresponds to the number of bits of the PCM pulse signal and does not have the same human
power. It is an object of the present invention to provide an electrostatic speaker that can solve
the problems such as manufacturing disadvantages, reduced efficiency, reduced human
resistance, increased distortion and the like that occur due to failure. Configuration The
electrostatic loudspeaker according to the present invention is basically composed of a fixed
electrode and a diaphragm (generally grounded), and the fixed electrode and the diaphragm side
I + 1 'motion 71K. (It is easy to divide V by using a method such as etching, and there is no
influence on the efficiency of this dam or the power of one side. The force applied to the
diaphragm by setting the number of divisions to twice or more the number of bits of the PCM
pulse signal, so that it is input to the manual power of each via 1 or to a plurality of divided
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electrodes. Is equal to that of the diaphragm, and it has the advantage that the entire diaphragm
vibrates uniformly 2 to reduce distortion. Description of the Embodiments Hereinafter,
embodiments of the present invention will be described. FIG. 1 shows an embodiment of the
present invention 7 and in FIG. It is a pull-type electrostatic speaker, and the diaphragm 7 is
supported at the center, and two fixed electrodes 8 and 9 are fixed on both sides of the insulating
support and so on so as to face the diaphragm 7 at a distance d. 6, here, the fixed electrode 8.9d
constituting the electrostatic speaker 10, as shown in the second, m X N equal area portions 1-1.
1-2 ... 1-1- m, 2-1, 2-2... 2-m... N-1, N-2. -1.2-1 ..... N-1, 1-2, 2-2--= N-2,---1-m.
2-m... N-m are connected in series or in parallel and have -Cm groups. The electrostatic speaker
10 receives the PCM pulse input signal B1. B2 и и и и и и и Bm superimposed on the bias power
supply 3-1. 3 и и и и и и и и и и и 3m through the transformer 5-1, 5 7, - are in) - "Do be input to the
respective groups 1, 2 и и и и и и m of the two-Symbol fixed electrode 8,9. At this time, the PCM
pulse input signal B1. B2 иииииии When Bm is m bits, bit 1 -1 divides group 1 and bit 2 divides group
2 and so on and bit m divides group m However, since each group 1, 2... M of the fixed electrodes
8 and 9 has the same area, weighting of each bit is input. It is carried out with a winding ratio of m "= false. Then, the PCM pulse input power signal B1. B2... Bm is converted into a digital signal
of ?? 90, ?. According to this configuration, each bit ratio of each group 1, 2, ..., m of fixed
electrodes 8, 9 as a digital signal in which the PCM pulse input signal is converted into three
values of ? -20,- Because it is input to the part, there are a number of areas in the speaker that
can be moved by the -11 bit signal, and the entire diaphragm vibrates uniformly to reduce
distortion. In the above embodiment, when the PCM pulse signal has m bits, the fixed electrode
constituting the electrostatic speaker 1o is divided into m X N equal-area parts, and bit 1 1-1. ...,
N-1 in proportion, bit 2 to 1-2, 2-2...; N-2 in proportion, and so on in the same manner. The PCM
pulse input signal is superimposed on the bias power supply through the transformer at a ratio
of 1 to 3-N-3-4 to N-4 and 1-m-N-m to "'"' + 'bit 1-m In addition, the weighting of each bit is
performed according to the winding ratio of the input capacitor when manually working on the
electrode assigned to each bit, or the fixed electrode is divided as shown in FIG. However, it is
possible to realize an electrostatic speaker capable of directly converting a PCM pulse signal into
a fun 0 signal. As shown in FIG. 3, when the PCM pulse signal has m bits, as shown in FIG. 3, the
area of the electrode is doubled so that the area of the electrode is doubled every time the
allocated bit is increased by one. -1.11-2 и и и и и и и и и и и и и и и и и и и и и и и 12n и и и и и и и и N и 1, N-2 и и и и и и и
N-n Divide 2 and bit 1 to 11-1. 12-1 ... ..., N-1, bit 2 to 11-2, 12-2, ... N- 2 in proportion, bit 3 3.
Bits 4 ░ ++-+ ++, bit m: 11-3 to N-311-4 to N-4, 11-m-N-m in proportion. At this time, the PCM
pulse input signals (B1 to Bm) are superimposed on the bias power supply 3 through the
transformer 6 and input to the electrode assigned to each bit, but the weighting of each bit
receives each bit It is configured to be performed at the ratio of the area of the fixed electrode.
By this configuration, an electrostatic speaker capable of directly converting a ternary PCM pulse
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signal into an analog signal can be realized. Although the fixed electrode is divided in the above
embodiment, the movable electrode on the diaphragm side facing the fixed electrode may be
divided, or both may be divided together. Effects of the Invention As described above, according
to the present invention, one of the fixed electrode and the diaphragm opposed to each other is
divided into NXm pieces, and N parts are combined to form m groups. Since the PCM pulse signal
is added to the m groups, it is easy to configure the number of weights corresponding to the
number of bits (= J divided, and each bit can be input to a plurality of electrodes. By doing this, it
has the advantage of being able to reduce the distortion that occurs when combining the signals
of each bit.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram showing an embodiment of the electrostatic speaker according to the
present invention, FIG. 2 is an enlarged view of an essential part of the same speaker, and FIG. 3
is another embodiment of the electrostatic speaker according to the present invention. It is a
block diagram of a fixed electrode.
(1-1) to (Nm) 11-1 to Nm------division fixed electrode, B1 to Bm ... PCM pulse signal source, 3 ...
bias power supply 4... Mirror-type resistance 5. Fixed electrode. Name of Agent Attorney Nakao
Toshio Other 1 person Figure 1 // 7)-Figure 2 3
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