SU594521A1 - Arrangement for reproducing pulse-width signals from magnetic tape - Google Patents
Arrangement for reproducing pulse-width signals from magnetic tapeInfo
- Publication number
- SU594521A1 SU594521A1 SU762414933A SU2414933A SU594521A1 SU 594521 A1 SU594521 A1 SU 594521A1 SU 762414933 A SU762414933 A SU 762414933A SU 2414933 A SU2414933 A SU 2414933A SU 594521 A1 SU594521 A1 SU 594521A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- magnetic tape
- arrangement
- width signals
- reproducing pulse
- pulse
- Prior art date
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
При воспроизведении ранее записанного на магнитную ленту (на чертеже не показана) ШИМС, имеющего форму пр моугольного импульса , этот сигнал дифференцируетс и подаетс далее на усилитель-ограничитель 4 дл выделени моментов перехода дифференцированного сигнала через нуль. Исход из особен-, ностей магнитной записи ШИМС видно, что производна сигнала воспроизведени может быть равна нулю не только на вершинах, но и у основани импульсов, имеющих, например, колоколообразную форму. Но ввиду -.наличи шумов нулевой уровень в указанном случае пересекаетс во многих точках, что вызывает по в ление помех в таком сигнале даже после прохождени им усилител -ограничител . Дл уменьшени вли ни помех на схему И 9 подаютс одновременно два сигнала: один с выхода усилител -ограничител 4, а другой - с ограничител 6. Сигнал с ограничител 6 представл ет по существу стробируюший импульс, который формируетс из отрицательного колоколообразного импульса, сигнала воспроизведени . Аналогично работает и друга схема И 8.When playing back a previously recorded, on a magnetic tape (not shown) PWSM having the shape of a rectangular pulse, this signal is differentiated and fed further to the amplifier-limiter 4 to highlight the moments of the transition of the differentiated signal through zero. From the peculiarities of the PWMS magnetic recording, it can be seen that the derivative of the reproduction signal can be zero not only at the vertices, but also at the base of the pulses, for example, bell-shaped. But in view of the noise difference, the zero level in this case intersects at many points, which causes the appearance of interference in such a signal even after it passes the amplifier-limiting device. In order to reduce the effect of interference on the AND 9 circuit, two signals are simultaneously transmitted: one from the output of the limiting amplifier 4 and the other from the limiter 6. The signal from the limiter 6 represents the gating pulse, which is formed from the negative bell-shaped reproduction signal. Similarly, the other AND 8 scheme works.
Достоинством описанного устройства вл ет с не только увеличение динамического диапазона примерно в 2,5 раза по сравнению с известным, но и возможность создани его на базе известных и выпускаемых отечественной промышленностью микросхем, например серий 140 и . Это удешевл ет устройство в це ом и делает экономически целесообразным его внедрение .The advantage of the described device is not only an increase in the dynamic range of about 2.5 times compared to the known one, but also the possibility of creating it on the basis of microcircuits known and manufactured by the domestic industry, for example, the 140 series and. This reduces the cost of the device in price and makes it economically feasible to implement it.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU762414933A SU594521A1 (en) | 1976-10-26 | 1976-10-26 | Arrangement for reproducing pulse-width signals from magnetic tape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU762414933A SU594521A1 (en) | 1976-10-26 | 1976-10-26 | Arrangement for reproducing pulse-width signals from magnetic tape |
Publications (1)
Publication Number | Publication Date |
---|---|
SU594521A1 true SU594521A1 (en) | 1978-02-25 |
Family
ID=20680918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU762414933A SU594521A1 (en) | 1976-10-26 | 1976-10-26 | Arrangement for reproducing pulse-width signals from magnetic tape |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU594521A1 (en) |
-
1976
- 1976-10-26 SU SU762414933A patent/SU594521A1/en active
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