HU195603B

HU195603B - Circuit arrangement for generating second sound carrier of stereophonic as well as two-sound television modulators

Info

Publication number: HU195603B
Application number: HU401185A
Authority: HU
Inventors: Sandor Barsony; Sandor Koppany; Laszlo Megyeri; Jozsef Zigo
Original assignee: Hiradastechnika Szoevetkezet
Priority date: 1985-10-16
Filing date: 1985-10-16
Publication date: 1988-05-30

Abstract

A találmány tárgya kapcsolási elrendezés sztereo, illetve kéthangú televízió modulátorok második hangvivójének az előállítására, amely kapcsolási elrendezésben feszültségvezéreit oszcillátor /1/ frekveneiflosztón /2/ keresztül fázisdiszkríminátor /3/ egyik bemenetére csatlakozik, míg a fázisdiszkríminátor /3/ másik bemenetére másik frekvenciaosztón /5/ keresztül referenciajelforrás /4/ van kötve cs a fázisdiszkriniinátor /3/ kimenete alulátercsztő szűrőn /6/ keresztül csatlakozik a feszültségvezéreit oszcillátor /1/ hangoló bemenetére. ■ A találmánynak az a lényege, hogy a feszültségvezéreit oszcillátorhoz /1/ csatlakozó írekvenciaosztó /2/ és a referencia jelforrásra /4/ csatlakozó frekvenciaosztó /5/ egy egy egymással sorbakapcsolt 1:64 arányú előosztóból /7, 9/ valamint 4096-nál nem nagyobb osztásarányú programozott frekvenciaosztóból /8, 10/ áll, továbbá a két programozott frekvenciaoszló /8, 10/ osztásarányai egymáshoz képest olyan relatív prímszámok, amelyek hányadosának eltérése a szabványos osztásaránytól 3 x 10~7-en bellii van. Kimenet 9 tO -1-The present invention relates to a switching arrangement for the production of a second speaker for stereo or two-tone television modulators, which, in a switching arrangement, is connected to an oscillator / 1 / frequency splitter / 2 / phase-discriminator / 3 / one input, while the phase discriminator / 3 / other input to another frequency divider / 5 / via reference signal source / 4 / is connected cs the phase discinator / 3 / output is connected via a low-pass filter / 6 / to the voltage conductor oscillator / 1 / tuner input. ■ The essence of the invention is that the voltage conductors for the oscillator / 1 / coupling frequency divider / 2 / and the reference source / 4 / connecting frequency divider / 5 / one of the interconnected 1:64 pre-splitters / 7, 9 / and 4096 do not a higher frequency ratio programmed frequency divider / 8, 10 /, and the two programmed frequency divisions / 8, 10 / pitch ratios relative to each other are relative prime numbers whose ratio to the standard pitch ratio is 3 x 10 ~ 7. Output 9 O -1

Description

Patent: (73)

Sándor BÁRSONY, 105 ?, Sándor KOPPÁNY, 30%, László MEGYERI. 10%, József Z1GÓ, 50% Budapest, HU

Telecommunication Technology Seoul, Budapest, HU (54)

SWITCHING FOR SETTING THE STEREO, OR A DUAL TELEVISION MODULE FOR PRODUCTION OF TWO SOUNDS OF TOWERS (57) EXTRACT

The present invention relates to a switching arrangement for producing a second audio carrier for stereo and two-tone television modulators, which, in a switching arrangement, is connected to an oscillator / 1 / frequency splitter / 2 / phase discriminator / 3 / one input, while the phase discriminator / 3 / other input to another frequency divider / 5 / via reference signal source / 4 / is connected cs the phase discriminator / 3 / output is connected to the voltage conductor oscillator / 1 / tuner input via low-pass filter / 6 /.

The essence of the invention is that the voltage conductors for the oscillator / 1 / connector frequency divider / 2 / and the reference source / 4 / connecting frequency divider / 5 / one of the 1:64 pre-splitters connected to each other / 7, 9 / and 4096 are not of the programmed l'-frequency divider / 8, 10 /, and the ratio of the two programmed frequency divisions / 8, 10 / divisions relative to each other are relative prime numbers, the ratio of which differs from the standard division ratio by 3 x 10 ~ ⁷ .

output

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Field of the Invention The present invention relates to a switching arrangement for the production of a second carrier for stereo and two-tone television modulators, which, in a switching arrangement, is connected to one of the inputs of a phase discriminator via a voltage-controlled oscillator, while a reference source is connected to the other input of the phase discriminator and the output of the phase discriminator is connected to a voltage-controlled filter via a low-pass filter. oscillator tuner input,

As is known, the introduction of stereo broadcasts in several countries has begun to address the improvement of the broadcasting of television broadcasting. As a result of these researches, several systems have been created, but no agreement has been reached in the unified international system to this day. For example, in the Federal Republic of Germany, a system based on a kangaroo carrier was adopted, which is suitable for both stereo and bi-voice / two different audio information, for example Hungarian language / transmission,

Key features of the system:

first voice recorder:

second voice:

pilot frequency:

pilot modulation:

azqnosító signals' stereo picture carrier ^f ♦ 5.5 MHz /> 500 Hz / particularly 5, 5 MHz = 352 ^f * kcpvivő 5.7421865 MHz / ± 500 Hz / MHz precisely 5.7421875 ^ = 367.5 54.6875 kHz / t 5 Hz / more 3.5 f | ₍

AM - 50.74 ·

117.5 Hz, more specifically fj, 133 kethang 274.1 Hz, more specifically fj, 57

In order to develop the characteristics according to the specifications, the image modulation is always at the center frequency, the sound modulation for simpler devices is mainly intércarrier system, and for the professional equipment the in space carrier system and the direct mid-frequency modulation can also be found. Stereo and dual-tone modulators are still relatively small due to the technical novelty of the device. ⁴⁰

Here, of course. to think of the Federal Republic of Germany, as there are still few stereo television systems in the world except the United States and Japan. It should be noted that the ⁴ systems used in the United States and Japan are significantly different from those of the Federal Republic of Germany.

The object of the present invention is to provide a switching arrangement that, with its simplicity and favorable quality parameters, enables us to enter the market for two television sets with competitive features. We have now recognized that the favorable price range of the different high frequency frequency dividers today allows us to apply the principle of direct modulation in single-mode modular frequency modulators. For example, 1: 64 1 GHz pre-splitters can also be used for handing the center frequency. The middle frequency / 38 MHz or 38.9 MHz / 64 part can also be processed with conventional θθ C-MOS devices. Using the above, a PLL circuit needs to be dimensioned for the voice transmitter, whose task is to ensure crystal accuracy, and then the FM modulation can be traditionally done, for example, with varicap diodes. cg

For the production of a conventional, for example, 33.4 Mll /.- cs B / G voice transceiver, in order to further simplify, the regression signal may be provided by the crystallizer of the image carrier. Λ In order to further improve the quality characteristics, it is advisable to select the reference frequency from 100 to 200 Hz or around 300 Hz.

In the case of the second speaker, the situation is much more complicated. Based on what is said, the following divergence ratios are calculated for the second spinner:

Λόρΐ '/ ΐ'ϋ - -WXVft famous thin% vivti- 2/237 hours

TiT

In addition, if we take into account that for the sake of cheap realization, it is. We also need to include a 1: 64 live distributor, with a brief reflection on how to create a relatively difficult to implement layout,

The invention is based on the discovery that there are two such ones found on the numerals. the relative prime of less than the theoretically determined value, the quotient of which is close to the theoretically determined value. practically corresponds to the pitch ratios required to produce the second voice carrier.

The invention is. the essence is that the frequency divider connected to the voltage-controlled oscillator and the frequency divider connected to the reference source consist of a 1: 64 splitter coupled to each other and a programmed fractional pitch of a splitting yoke not larger than 4096, and the ratio of the two programmed frequency divisors relative to one another prime numbers, the ratio of which is within 3 x 10 ~ ^{7 of the} standard ratio.

The invention will be described in more detail by means of the embodiments illustrated in the figure: a schematic diagram of an exemplary embodiment of the invention is illustrated.

The oscillator output 1 of the voltage conductors 1 shown in the switching arrangement of Figure 1 is connected via a frequency divider to an input of a phase discriminator 3, while a reference signal source 4 is connected to the other input of the phase discriminator 3 via another frequency divider. The output of the phase discriminator 3 is via a low pass filter 6 connected to the tuner input of the voltage conductors 1 oscillator.

According to the example, the oscillator of the voltage conductors 1 is the oscillator of the voice carrier, while the reference source 4 is the oscillator of the image carrier, so that the frequency divider is the frequency divider 2, while the frequency divider 5 is the frequency divider dividing the image carrier. In the -2 frequency divider, one Γ. : 64 ratio. Pre-splitter 7 is a programmed frequency divider 8 coupled to it, while a pre-splitter 9 with a frequency of 1: 64 and a programmed frequency divider 10 are also connected in the frequency domain 5. The pitch ratios of the programmed frequency bands 8, 10 are relative relative numbers relative to each other, the ratio of which is within 3 x 10 ~ ^{7 of} the standard ratio.

For the B / G standard modulator with the aforementioned 38.9 MHz image carrier, the frequency divider ratio of the frequency divider 2 is 64 x 21221 and the frequency divider ratio of 5 is 64 x 24896. Partition Ratio:

195,603

N _k 64 x 24S96

Claims

Claims where, k is a theoretical quotient

N _k - frequency divider division ratio jk- carrier /

Nh - Frequency Divider Ratio

Realization! for the sake of consideration, we are looking for a pair of numbers according to the invention in the section up to 4096

3814 k, = - - 1.1731 77484 ¹ 3251 where, k _{t is} the quotient of the invention.

The difference between the two ratios: k _e - k _t = 0.000000029 It can be seen that the fault caused by the arrangement according to the invention is below 3 x 10 ~ ⁸ , which is very good in this case.

There are a few more pairs with which the quality does not deteriorate. Examples include 2913 and 2483.

The advantage of the circuit arrangement according to the invention is that, while fully satisfying the quality conditions, it significantly simplifies the construction of the frequency divider 2.5, thus making the switching arrangement more economical.

The switching arrangement can of course also be used with other frequency values and other standards (e.g., B / G, or later in D / K / case).

The invention is not limited to the solutions described in the embodiment, but extends to all the solutions, in particular those protected by the main claim.

1. Switching Arrangement Stereo or Dual-Tone Television Modulators Second Voice Receivers to the Generator, which in a switching arrangement are connected to a single phase input of a phase controlled descrambler through a frequency divider, while a reference source is connected to the other input of the phase discriminator via a second frequency divider. voltage-controlled oscillator tuner input, characterized in that the voltage-controlled oscillator / 1 / connector frequency divider / 2 / and the reference source / 4 / connector frequency divider / 5 / one of one-to-one scaled 1: 64 clusters 15/9, and / or 4096 has no programmed freq. / / 10/10, and the programmed frequency divider / 8, 10 / fraction ratio is relative relative to each other, the ratio of which is within 3 x 10 ^{_7 of} the standard ^scale ratio.

Switching arrangement according to claim 1, characterized in that the oscillator of the voltage-controlled oscillator / 1 / a is the oscillator of the reference source / 4 / the image carrier.

A circuit arrangement according to claim 2. characterizing that the ratio of the pitcher producing Irish vectors </ 5 / programmed freq / lake / 10 / a is 3814, while the frequency divider / 2 / programmer !, frckvcneia divider / 8 / fractional ratio is 3251.

The switching arrangement according to claim 2, characterized in that the ratio of the frequency divider / 5 / programmed frequency divider / 10 / os35 is set to 2913, while the frequency divider / 2 / programmed frequency divider / 8 / az of the voice carrier is. share ratio 2483.

drawing, Figure 1

-3Kimenet

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Published by the National Inventory Office responsible for publishing: Zoltán Himer Head of Department Appears at the Technical Publishing House CULTURAL PROFILE FOTON printing house K 88036