SU458856A1 - A device for reproducing frequency modulated signals from a magnetic tape - Google Patents
A device for reproducing frequency modulated signals from a magnetic tapeInfo
- Publication number
- SU458856A1 SU458856A1 SU1969731A SU1969731A SU458856A1 SU 458856 A1 SU458856 A1 SU 458856A1 SU 1969731 A SU1969731 A SU 1969731A SU 1969731 A SU1969731 A SU 1969731A SU 458856 A1 SU458856 A1 SU 458856A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- magnetic tape
- modulated signals
- frequency modulated
- reproducing frequency
- frequency
- Prior art date
Links
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Television Signal Processing For Recording (AREA)
Description
образуетс в последовательность импульсов, ам1ПЛ:итуда и длительность которых строго посто нна , а частота следовани соответствует частоте воопроизводимого сигнала. В оигаале, полученном после демодул тора 5, присутствует величина относительной девиации частоты , имевшей iMecTo при записи сигнала, а в сигнале после демодул тора 8 этой величиный не оказываетс . Подава с демодул тор а 8 сигнал на блок вычитани можно убрать посто вную составл ющую. Тогда сигнал, поступающий iHa звтво р полевого транзистора, измен ет величину .коэффициента усилени операционного усилител . В результате «а выходной шине 15 устройства имеет место искажение , величина которого пропорциональна квадрату величины коэффициента детонации. Учитыв а это, а также и то, что амплитудные, частотные и фазовые характеристики .каналов 1 и 2 практически идентичны, возможно осуществление компенсации детонации с повышенной точностью в широком диапазоне частот и упрощение схемы самого устройства.is formed in a sequence of pulses, am1PL: and where and the duration of which is strictly constant, and the frequency of the pulse corresponds to the frequency of the produced signal. In the instant received after demodulator 5, there is a value of the relative frequency deviation that iMecTo had during the recording of the signal, and this value does not appear in the signal after demodulator 8. By applying a demodulator signal to the subtraction unit, you can remove the constant component. Then the signal from the input transistor, iHa, changes the gain of the operational amplifier. As a result, “and the output bus 15 of the device is distorted, the magnitude of which is proportional to the square of the magnitude of the detonation coefficient. Taking into account this, as well as the fact that the amplitude, frequency and phase characteristics of channels 1 and 2 are almost identical, it is possible to compensate for detonation with increased accuracy in a wide frequency range and simplify the design of the device itself.
Предмет изобретени Subject invention
Устройство дл воспроизведени с магнитной ленты Частотио-модулированных Сигналов, основанное на компенсации детонации, «содержащее отдельные каналы дл воспроизведени сигналов информационной и опорной частот, первый из которых состоит из после-довательно соединенных магнитной головки,A device for reproducing from a magnetic tape Frequency-modulated Signals based on knock compensation, "containing separate channels for reproducing informational and reference frequency signals, the first of which consists of successively connected magnetic heads,
усилител -формировател и демодул тора, а второй - из магнитной головжи, усилител формировател , демодул тора, блока 1выч1итани и источника посто нного напр жени , отличающеес тем, что, с целью упрощени an amplifier -former and a demodulator, and the second one from a magnetic head, an amplifier of the former, a demodulator, a 1T1-unit and a constant voltage source, characterized in that, in order to simplify
его iCxeMbin повышени точности компенсации детонации, оно снабжено последовательно соединенныМ|И между собой операционным усилителем , неинвертируемый вход которого подключен к выходу демодул тора канала воспроизведени сигналов информационной частоты , и полевым транзистором, затвор которого св зан с выходом блока вычитани канала воспроизведени сигналов опорной частоты .its iCxeMbin increases detonation compensation accuracy, it is equipped with series-connected | And between themselves an operational amplifier, non-inverted input of which is connected to the output of the information frequency signal playback channel demodulator, and a field-effect transistor, the gate of which is connected to the reference frequency output channel.
.- 5 J.- 5 J
J;„,„JJ; "," J
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1969731A SU458856A1 (en) | 1973-11-11 | 1973-11-11 | A device for reproducing frequency modulated signals from a magnetic tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1969731A SU458856A1 (en) | 1973-11-11 | 1973-11-11 | A device for reproducing frequency modulated signals from a magnetic tape |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU458856A1 true SU458856A1 (en) | 1975-01-30 |
Family
ID=20567528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1969731A SU458856A1 (en) | 1973-11-11 | 1973-11-11 | A device for reproducing frequency modulated signals from a magnetic tape |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU458856A1 (en) |
-
1973
- 1973-11-11 SU SU1969731A patent/SU458856A1/en active
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