SU536510A1 - Method of magnetic recording and reproducing information - Google Patents

Method of magnetic recording and reproducing information

Info

Publication number
SU536510A1
SU536510A1 SU2168336A SU2168336A SU536510A1 SU 536510 A1 SU536510 A1 SU 536510A1 SU 2168336 A SU2168336 A SU 2168336A SU 2168336 A SU2168336 A SU 2168336A SU 536510 A1 SU536510 A1 SU 536510A1
Authority
SU
USSR - Soviet Union
Prior art keywords
magnetic recording
reproducing information
head
frequency
magnetic
Prior art date
Application number
SU2168336A
Other languages
Russian (ru)
Inventor
Ольгерд Иванович Бабич
Виктор Иванович Куля
Николай Павлович Маляренко
Original Assignee
Предприятие П/Я А-3103
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Предприятие П/Я А-3103 filed Critical Предприятие П/Я А-3103
Priority to SU2168336A priority Critical patent/SU536510A1/en
Application granted granted Critical
Publication of SU536510A1 publication Critical patent/SU536510A1/en

Links

Description

in FIG. 2, the reproduced signal in the range of the first maximum is additionally amplified to the level of the first 1 branch by 18 dB. Since the amplification is carried out in a relatively narrow frequency band of 1.5–3 kHz, the dynamic range of the reproduction path in the 200–3000 Tt band decreases slightly and amounts to 35 dB. It is practically possible to increase the second maximum.
At a frequency of 1500 Hz, there is the greatest failure. The deep-fist is sufficiently reduced with increasing and decreasing frequency of the reproduced signal.
The presence of such a llah practically does not affect speech intelligibility and is barely noticeable by ear if the failure is in the region of approximately 1500 Hz when recording-reproducing speech in the 200-3000 Hz band.
(An example of a block; circuit device that implements the method shown in Fig. 3.
The magnetic tape / wound on the coils 2 and 5 is in contact with the magnetic recording heads 4 and playback 5. The magnetic recording head is connected to the recording amplifier 6 and the biasing generator 7. The magnetic playback head is connected to the playback amplifier 8, which contains circuits 9, providing additional amplification of reproducible signals in the range of maxima of recoil. The capacitance 10 is connected in parallel to the reproduction head 5 and forms a resonant tour with a revolving head.
When rewinding the magnetic recording medium 7 from coil 2 to coil 3 using a magnetic recording head 4, an electrical signal is recorded in the sound frequency range at the input of recording amplifier 6, which also amplifies the signal.
The bias current enters in the recording process from the boost generator 7. The magnitude of the bias current is chosen from an aggregate condition in which the nonlinear distortions in the low frequency range 1 are within acceptable limits. Simultaneously, the maximum possible level of frequency response maximums is provided.
The recorded signal is reproduced by the magnetic head 5 and is amplified by the reproduction amplifier 8.
Correction circuits, such as LC-stars, provide additional amplification of the reproduced signal in the region of the first, or first and second, etc., maxima of the frequency response. In addition to raising the gain, if necessary, circuit 9 also corrects the shape of the maxima, which is determined by the parameters of the correction circuits.
The resonant circuit formed by the playback head 5 and the capacitor 10 is tuned to the frequency of the maximum recoil that needs to be amplified, for example, the first, which provides an additional increase in the level of the reproduced signal in the range of the recoil maxima. A playback enhancer 8 must be provided with this. Somewhat higher input resistance (normal ten kΩ), so as not to shunt the resonant circuit.
The technical and economic efficiency of the proposed method of magnetic recording and reproducing information lies in the fact that this method reduces the speed of movement of the recording medium at a given width of 2-3 times for a given width of the working gap of magnetic HEAD. And the upper frequency of the reproduced signal At the same time, reduce the consumption of the carrier by magnetic recording per unit of time, or increase the recording time by a factor of 2–3 with a given amount of carrier.
The proposed method also allows a 2-3-fold increase in the upper frequency of the reproduced signal at a given speed of carrier movement relative to the magnetic heads and the width of the working gap of the head.

Claims (2)

1.Burgov V.A., “Physics of Magnetic Sound, Spy, Art, M., 1973, p. (prototype).
2. Authors certificate 422028, M. Cl. G 11 B 5/02, 11.09..1974.
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SU2168336A 1975-08-21 1975-08-21 Method of magnetic recording and reproducing information SU536510A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU2168336A SU536510A1 (en) 1975-08-21 1975-08-21 Method of magnetic recording and reproducing information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2168336A SU536510A1 (en) 1975-08-21 1975-08-21 Method of magnetic recording and reproducing information

Publications (1)

Publication Number Publication Date
SU536510A1 true SU536510A1 (en) 1976-11-25

Family

ID=20630461

Family Applications (1)

Application Number Title Priority Date Filing Date
SU2168336A SU536510A1 (en) 1975-08-21 1975-08-21 Method of magnetic recording and reproducing information

Country Status (1)

Country Link
SU (1) SU536510A1 (en)

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