SU1509990A1 - Device for digital magnetic recording - Google Patents

Abstract

This invention relates to instrumentation engineering, in particular to devices for recording digital codes of rhythmic processes on magnetic media. The goal is to increase the recording density of the measurement information. Achieved by introducing a counter 11 connected between a pulse generator 2 and an input of a pulse shaper 3, an OR 5 element connected between an output of an AND 16 element and an input of recording amplifier 9, a register 4 connected by an output to the first input of an AND 16 element, and two decoders 14 and 17 connected to the corresponding outputs of the counter 6. 1 Il.

Description

one

(21) 4320014 / 24-10

(22) 10/26/87

(46) 09/23/89. Bul No. 35

(72) B.N.Kot, A.M.Koka and V.I. Fedko.

53) 534.852 (088.8).

(56) USSR Copyright Certificate No. 1174972, cl. G 11 B 5/09, 1985.

Author's certificate of the USSR No. 1159061, cl. G 11 B 5/09, 1985.

(54) DEVICE OF DIGITAL MAGNETIC RECORDING (57) The invention relates to instrument making, namely to devices for

recording digital codes of rhythmic processes on magnetic media. The goal is to increase the recording density of the measurement information. Achieved by introducing a counter 11 connected between a pulse generator 2 and an input of a pulse shaper 3, an OR 5 element connected between an output of an AND 16 element and an input of recording amplifier 9, a register 4 connected by an output to the first input of an AND 16 element, and two decoders 14 and 17, connected to the corresponding outputs of the counter 6. Gil.

l

SP

about

;ABOUT

CO SO

This invention relates to instrumentation engineering, in particular to devices for recording digital codes of rhythmic processes on magnetic media.

The purpose of the invention is to increase the recording density of the measurement information.

The drawing shows a block diagram of the proposed device.

The digital magnetic recording device contains the first counter 1, the input of which is connected to the output of the generator 2 pulses, the first element 3 and the first register 4 connected in series, the input bus 5, the second and third counters 6 and 7, the driver 8 pulses, the recording amplifier 9 connected with the output bus 10, the fourth counter 11, connected between the output of the pulse generator 2 and the input of the pulse former 8, the output of which is connected to the input of the second bis counter by the first inputs of the first and second elements IZ and 12, the first and second decryption rators 13 and 14, whose inputs are connected to the corresponding; to them the outputs of the second counter 6, the OR element 15, the first input of which is connected through the third element AND 16 to the output of the first register 4, information inputs connected to the input bus 5, the second input - with the output of the first decoder 13 and with the control input of the first register 4, the third input with the output of the second element And 12, and the output of the element OR 15 with the input of recording amplifier 9, the second register 17 connected by the output to the second input of the element 12. At This direct output of the second decoder is 14 with the third input of the element I 12 and with the synchronizing input of the register 17, the control and the first information inputs of which are connected to the output of the first and the input of the third counters 1 and 7, the outputs of the last of which are connected to other information inputs of the register 17, respectively 14 is connected to the second input of the element FROM, the output connected to the second input of the element AND 16.

The device works as follows.

The pulse generator 2 forms a reference frequency, which in counter 1 is divided by the frequency of the time stamps on the magnetic carrier.

five

ten

. 20 25 g:: Q

45

50

and on the counter 11, it is divided to the frequency of the information bits at the input of the recording amplifier 9.

The signal from the output of counter 1 in the form of short positive pulses arrives at the control and first information inputs of the register 17 and at the counter input of the counter 7. The last one, recalculating the input pulses, forms a parallel potential time code that arrives at the other information inputs of the register 17.

The register 17, with a positive potential at its control input, is loaded with information from the time code present at the information inputs of the register along the leading positive edge of the synchronizing signal. At the same time, the first discharge of the register 17 is recorded with a signal to its first information input before the time code the start of the time code in the form of an extra single bit.

The signal from the output of the counter 11 is fed to the pulse shaper 8, at the output of which tact-B6ie pulses are formed, normalized in duration, which are then fed to the counting input of the counter 6 and to the first inputs of the And 3 and 12 elements.

The outputs of the counter 6 are connected accordingly to the first and second decoder 12 and 14.

The decoder 13 is connected in such a way that during the full filling of the counter 6 on the first decoder 13 a one-time positive pulse of the start of word marker is formed, which through the second input of the OR element 15 enters the recording amplifier 9 and the control input of the register 4.

The duration of the marker pulse is chosen to be longer than the information (time bits) for reliable recognition of the marker during playback. The decoder 14 generates pulses of illumination of temporal information, which from the direct output goes to the synchronizing input of the register 17 and to the third input of the element I 12.

At low potential at the control input of the register 17, the leading edge of the pulses of the time information highlighting the time code embedded in the register 17 is sequentially outputted

with his. output to the second input element And 12, At the third output element And 12, a sequential time code is formed with a sign of the beginning of the code, which through the element OR 15 enters the recording amplifier 9.

Reverse pulses of illumination of temporal information from the inverted output of the decoder 14 arrive at the second input of the element I 3, which cuts the areas reserved for the time code into a sequence of clock pulses.

The sequence of sync pulses received at the output of the AND 3 element arrives at the synchronization input of register 4 and, at a high potential at the control input of the register 4, inputs the input information into this register, and at low potential, shifts the stored information to the output of the register 4,

From the output of the register 4, the serial potential code of the measurement information arrives on. the first input of the element is AND 16, / which normalizes this code by duration and sends to the first input of the element OR 15, which at the output sums the code of the measurement information with the time code and marker pulses.

The proposed device allows, by reducing the recording area on the magnetic carrier, retracting the time code for service information, to increase the recording volume of useful measurement information, i, e, to increase the recording density of measurement information,

Claims (1)

Invention Formula A digital magnetic recording device comprising, first counter, input 0 five 0 which is connected to the output of the pulse generator, serially connected first element AND and the first register, input bus, second and third counters, second and third elements AND, pulse shaper, recording amplifier connected to the output bus, characterized in that, in order to increase the density records of measurement information; a fourth counter is inserted in it, connected between the output of the pulse generator and the input of the pulse former; the output is connected to the input of the second counter and to the first inputs of the first and second And, the first and second decoders, whose inputs are connected to the corresponding outputs of the second counter, the OR element, the first input of which is connected through the third AND element to the output of the first register, information inputs connected to the input bus, the second input to the output of the first decoder and with the control input of the first register, the third input with the output of the second element AND, and the output of the element OR with the input of the recording amplifier, the second register connected by the output to the second input of the second element AND, while the direct output the second The decoder is connected to the third input of the second element I and the synchronizing input of the second register, the control and first information inputs of which are connected to the output of the first and the input of the third counter, the outputs of the last of which are connected to the other information inputs of the second register, respectively. - pshfratora connected to the second input of the first element And the output connected to the second input of the third element And 0 0