SU1474734A1 - Apparatus for magnetic recording of information and time signals - Google Patents

Abstract

The invention relates to a magnetic recording technique, namely to information retrieval devices on a magnetic tape. The invention allows to significantly improve the accuracy of information retrieval on a magnetic tape and reduce the time spent on its implementation by using a device in which the principle is applied proportional to the deviation of the time code increment speed with step-by-step approximation to the location of information on a magnetic tape. The apparatus contains a correction counter block 18 time, the information outputs of which are connected to the second bus 26 of the inputs of the comparison circuit 13. Each parcel of a time code read from a tape is compared with a th search time set twice: directly after the read time code from the tape, and after receiving the sensed code increments by an amount proportional to the conveying speed of the tape in the search. 2 Il.

Description

the increments of the code read time in & 5 OR, the second input of which is connected to

the instant of time ta is maximum, since the belt transport speed reaches the highest value at that time, and is chosen such that

the bus of the logical unit through the search enable button, the first and second triggers, the reset inputs of which are interconnected and connected to

OR, the second input of which is connected to

the bus of the logical unit through the search enable button, the first and second triggers, the reset inputs of which are interconnected and connected to

nxo / fdM turned on the search drive unit Lenn, characterized in that, in order to improve the accuracy of information retrieval, a tachometer sensor connected to the magnetic tape, and the second OR circuit, kinematically connected to a magnetic tape, was inserted into it; the output bus of the code decoder is connected to the bus of the installation inputs of the time correction block, the input of the installation resolution of the counter block is connected to the output of the installation pulse generator, the information outputs of the counter block are dinenes with the second

the input bus of the comparison circuit, the gdcd of which is connected to the information inputs of the first and second trggers, the output of the first clock generator is connected to the synchronization input of the first trigger, and the output of the second clock generator with the synchronization input of the second trigger, the output of the first trigger is connected through the first delay circuit to the input of the replay the tape drive unit and through the second OR circuit with the input of the shutdown input of the tape drive unit, the output of the second flip-flop is connected to the second input of the second circuit s and the input of the second OR circuit delay.

2t3 t3tst7

FIG. 2

Compiled by S. Podorsky Editor L. Gratilo Tekhred L. Serdyukova Proofreader L. Pilipenko

Order 1901/51

Circulation 558

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 11Sh35, Moscow, Zh-35, 4/5 Raushsk nab.

Subscription

Claims (1)

Claim An apparatus for magnetic recording of information and time signals · containing a tape drive unit with a magnetic tape installed on it, a multi-channel playback head coupled to magnetic tape, connected via playback amplifiers to the information output bus and to a code decoder, the output of which is connected in series with the first clock generator, the setup pulse shaper and the second sync pulse shaper, as well as the time setting block connected to the first input bus of the comparison circuit, the first a delay circuit, a second delay circuit, the output of which is connected to the first input of the first OR circuit, the second input of which is connected to the logical unit bus via the search enable button, the first and second triggers, the reset inputs of which are interconnected and connected to Ί the input of the inclusion of the troops block priv-. yes tapes, characterized in that, in order to improve the accuracy of information retrieval, a tacho-shaper is connected kinematically connected to the magnetic tape, the output of which is connected to the clock input of the block of time correction counters, and a second OR circuit, and the output bus of the code decoder is connected to bus for the inputs of the installation of the block of counters for time correction, the input of the permission to install the block of counters is connected to the output of the pulse shaper 15 sa installation, the information outputs of the block of counters are connected to the second bus of the inputs of the circuits comparison, the output of which is connected to the information inputs of the first and second triggers, the output of the first clock driver is connected to the synchronization input of the first trigger, and the output of the second clock driver with the synchronization input of the second trigger, the output of the first trigger is connected through the first delay circuit to the block playback enable input the tape drive and through the second OR circuit with the stop enable input of the tape drive unit, the output of the second trigger is connected to the second input of the second OR circuit and the second input th delay circuit. Fie. 2