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JPS55135599

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS55135599
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a television audio multiplex
broadcast receiver using an earphone circuit of the present invention. 12 ・ ・ ・ Earphone
volume with center tag, 14 ・ ・ ・ Yahon, 15 ・ ・ ・ Switching transistor.
[Detailed description of the invention] The draft name relates to the earphone circuit of the
television sound multiplex transmitter-receiver. In the conventional-crotch television audio
multiplex broadcast receiver, the earphone shank is divided into two on the left and right from
the left, and -t not from V) or RLf '; Although it is derived, in the case of (1) /, 3f 'near /, there was
a mishap in replacing the earphone plug each time according to the preference of the viewer.
Therefore, the problem described above can be solved by providing a separate earphone polyum and switching control of the earphone output to the main channel and the sub-channel by
means of the poly- um by adopting a method-). In this case, there is a possibility that an
unnecessary L-R signal may be output from the earphone, in particular, due to erroneous -1 in
stereo broadcasting lIf. The work is made in the light of this kind of thing, and the center
distribution is the earphone round l'6 which adopted the method (in C, it is extracted from the
unknown L-R signal at the time of stereo broadcast reception. It is also good to provide no
earphone circuit. The present invention will be described according to the embodiment shown in
FIG. The first side of the present invention shows a circuit diagram of the embodiment of the
present invention, where 1 is a band pass filter, 2 is a sub-channel inspection & u + 14, s, 4 is a
low pass filter, and 5 is a S5 teleomatic link. The circuit 6 is a stereo amplifier 1d, 7 (2 (¥)) ”is a
pyronotoy Δ discrimination discriminative watering circuit, 8 and 9 are speakers, and these
constitute a general audio multiplex broadcast receiving circuit. In the usual receiver, the
earphone output is branched and taken out from each of the speakers 8. However, here, in
particular, the buffer resistances 10.2. The audio signal of the sub channel and the hair channel
is derived through II and applied to both ends of the center-tapped earphone poly 120 120, the
earphone output from the slider of the volume 12 is taken out and supplied to the earphone 14
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through the amplifier 13. Furthermore, the ground cover is also grounded, and the 12D center
tap is grounded, and the junction point of the carved polyium 12 and the resistor 10 to e et al.
The stereo control signal is supplied from the base V パ イ) 号 N メ イ 4 m no. 7 7 1 1 伸 受 信 受
信受信パイロットパイロットパイロットパイロットパイロットパイロットス
イスイスイノノらはらはらはステレオらはステレオステレオステレオステレ
オ ス テ レ オ ス テ レ オ ス テ レ オ ス テ レ オ; b + I (財) signal not derived, in this case switch /
ct-77 (3) The sister 5 has a cut-off width up to one.
Under this condition, if you set the slider of the polium 12 to the center position 44 "[a, of course,
the input to the amplifier 13 does not make any sound from the earphone 14 but the Further, if
the child is added to the center position [above d, ie, on the resistance ll side], the speech signal
of the main channel obtained through the low-pane filter 4 is manually input to the amplifier 13
and I can hear it. On the other hand, the slider of volume 12 is located above the center position,
that is, resistance 1 (if set to IfJll 1i, the audio 1 note of the subchannel obtained from Rohms 11
11 is input to amplifier 13; 2.) When the earphone 14 can hear the sub-channel sound. ・ If this
is five, the size of the earphone output is “Slide-1 B!” It is determined by the set position LIt of
'. At the time of reception of a stereo broadcast, a stereo: ti + ItiCi is derived from a pyro-) 1.7, a
separate switch, a separate communication circuit 7, and by this, the transistor 15 turns into an
on / off state. According to (-3), when the slide F of the polium 12 is set to I-no j from the center
position) (4) The main channel audio signal obtained through 10-panufil 4 or the L + R signal is
an amplifier 13 The monaural signal of “L” -R can be heard by the earphone 14, but
conversely, when the slider of the poly 12 is mistakenly set to be closer to the center position
ii′j, this is a low-huss filter 3 The L-Ria signal is not input to the amplifier 13 at this time, and
the earphone 14 can not hear the same sound, since the side channel blind signal obtained by the
above, ie, the L-R signal falls to the ground via the transistor 5. In the present invention, as
described above, the center Tano 7 'or earthed I. hon-Borui l is used, and the main channel and
the sub-chanone at both ends of the polyium. The voice output of the voice signal is applied, and
the earphone output from the slider of the volume is U) so-called center distribution JJ complete
O ear hono ring for a while Since the stereo channel between i 'and earth: + Illat and -i is inserted
by the presence or absence of the ono-off system, it is inserted into the stereo channel r-, so
when receiving a stereo broadcast at tJi, the sub-chaf 寥 I し r' \ 1 point signal The L-RGi No. is
dropped to the arp via the (5) inotink stack, and the earphone does not erroneously output this
unnecessary L-R signal. Therefore, if the earphone circuit of the present invention is used, even if
the center distribution is in the case of the earphone circuit of the system, it does not listen to the
L-R signal with the earphone without knowing the operation width of false -1 at stereo
broadcasting. The earphones can hear L + H regular monaural signals.
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