SU1608742A1 - Multichannel device for recording/playback of analog information - Google Patents

Abstract

The invention relates to instrumentation. The purpose of the invention is to increase the dynamic range of the signals during recording - playback. Into a device containing N input buses, an amplifier unit 1, a reference voltage unit 2, switches 3 and 15, a clock frequency generator 4, two control units, a frequency modulator 8, a frequency demodulator 11, a low-pass filter unit 18, a selection unit information signals and a cyclic frequency extraction unit 13, a demultiplexer 16 and a sampling-storage unit 17 are additionally introduced. In this case, the blocks 18, 7 and 2 and the generator 4 are made manageable. 2 Il.

Description

 .1608742 The invention relates to instrumentation, in particular, to magnetic recording and information playback devices, and can be used to create multi-channel systems for detecting wideband analog signals.

The aim of the invention is to improve the accuracy and wider the dynamic range of the recording and reproducing signals,

Figo is a block diagram of the device; 2 - sretote, the corresponding inputs of which are connected to the outputs of block 17, .block - 19 restore information signals 5, the auxiliary input of which is connected to the summing input of block 1, and the outputs - to N information output buses, the second switch 20, connected to the second input of the block 10 magnetic heads.

The device works as follows

In the recording mode, information on the N input buses is fed to the inputs of the block.

15 and 1, where it is added to the reference stresses and "; (i,.,., N) block

1 / - - - f 1-4.41. V, WJUJJVCl

This channel is used as a service for recording a cyclic synchronization pulse, the frequency of which is f -i-c.

 D t-T duration

change charts.

The device contains N input buses connected to the inputs of the block 1 9 p "o" ° lils

The unit 1 moves together with the second, the N fnvr-T input. The block 2 home is connected to the information 2. inputs of the first switch 3, as well as the 4 clock frequency generator connected to the first output. 25 input divider 5 frequency and the input of block 2, video magnetic. (VM) 6 ,-. - therefore, the first control unit 7 connected, the first input of which is connected to another input of the gene, is connected. SINTER from the input generator H is the signal of the Rator 4 and the second input of the divider 5, f is fed to the inputs of the Paz divider, and the second input to the first input of the de, tota and the first control unit 7

7 ™;.: G .- :: -; - g., .7- ™ -:., - srcr.- .:

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clock pulse (). Simultaneous cycle frequency 13, the outputs of the yoke are connected respectively to the first

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(AIMgr) signal, in which there are discretized in accordance

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the one, the corresponding inputs of which are connected to the outputs of block 17, the block of recovery of information signals 5, the auxiliary input of which is connected to the summing input of block 1, and the outputs to the N information output buses, the second switch 20 connected to the second input of the block 10 magnetic heads.

The device works as follows

In the recording mode, information on the N input buses is fed to the inputs of the block.

5 ka 1, where it is added to the reference stresses and "; (i,.,., N) block

9 п „о« лилс

1 / - - - f 1-4.41. V, WJUJJVCl

This channel is used as a service for recording a cyclic synchronization pulse, the frequency of which is f -i-c.

 D t-T duration

N fnvr-T P 2 s from the input generator H signal f is fed to the inputs of the Partet divider and the first control unit 7

q ® Long Tl.

clock pulse (). Simultaneously 14 and the initial state, both when the error occurred, and at the end of the polling cycle of all N channels, Block 14 simultaneously controls the operation of the third switch 15 and the demultiplexer 16, sequentially connecting the input of the switch 15 for each channel to the corresponding N outputs B the result on each of the N you

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of the third switch 15 in response to | gs channel PIM; - signals from frequencies 1) and sampling F -; j, -, and to the left HOD1X demultiplexer 1

the dying sequences of impulses coincide in time with lsa (Lig.2). (Anal AIK -signals with N output

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the signals are also subtracted - the reference voltage and the required gain, after which the analog signals, adequate to the original, are fed to the N output buses.

The operation of the unit 2 of the reference voltages is controlled by setting (switching) the reference voltages Ugj and UQ in the unit 1 of the amplifiers-adders according to the number of specified information N and sync S channels O Select the number of required information channels Yud | - the addresses for the switches 3 and 15) change the operation mode of the first 7 and second 14 control units, and also control the operation of the clock generator 4 (after

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This switch 15 is supplied to the last 20 with discretely tuned and formatted inputs of block 17 with settable frequency), discretely setting: two sample-store (SWI), and the required value of t (beats |.,

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the control inputs are the corresponding — sequences of pulses of ecstasy from all N outputs of the demulti- racer 16,

i Рр p, gj (and, consequently, Fe in the selected information channels, as well as the same block of 18 low-pass filters (made with a discretely tunable cut-off frequency fcp) set the required low-pass filter in each used channel, and in general, i, , in accordance with the requirements of the Kotelnikov theorem and depending on the selected sampling frequency F- in the information channel.

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1a of FIG. 2 are designated: A; - input information signal on the i-th channel;

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.- channel AIM, -signal on the i-th site of the switch 15; output-3 (the signal at the i-th output of the demultiplex- 1 16; Uygyj is the signal at the ws-th output of the 17 UHP (, ..., N). governing impulse U, determined by the sampling time of the UHH, equal to when-,

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during which the level is memorized

ednogo channel, d ,. signal,: those of which the information input of the water economy; stitched and stored in it a hidden level ueh in the flow .-- ..

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) a single information value of 1al with amplitude and corresponding / lean control data. At the same time, during the time the interference on the i-th output of the third commutator 15 was practically not pro- duced, as on the i-th output bus, the device was installed by the block 18 of low-pass filters (made with a discretely tunable cut-off frequency fcp) for each channel used, moreover, in general, i ,, in accordance with the requirements of the Kotel'nikov theorem and depending on the chosen sampling frequency F- in the information channel.

In this way, the optimum mode of operation of the device of the corresponding blocks of the device is established, which allows recording signals with different bands across different channels.

40 frequencies, as well as vary the required number of information channels.

Claims (1)

Invention Formula 1 "Multichannel device, for 45 recording and reproducing analog information, containing a block of amplifiers of adders with N input racks, the summing inputs of which are connected to the first output of the block of reference to: TWA, and the gain of the block of 50 strands and of the information signal insertion restoration unit) in will be K those, several units. From K to outputs 17, the VHF signals are fed to the N inputs of the block 18 of low-pass filters, where they are restored in accordance with skinny analog signals for each of the recorded channels, in block 19 of the restoration of information formation signals, the second output of the reference voltage block, the amplifier-adders block and the first control block — to the inputs of the first switchboard, one output of which is connected to the input of the frequency modulator connected to the output of one block of magnetic heads; the second input is connected to the output of the second. frequency), the required value of m is discretely set (beats | i Рр p, gj (and, therefore, Fe in the selected information channels, as well as a block of 18 low-pass filters (made with a discretely tunable cut-off frequency fcp) set the necessary low-pass filter in each channel used, and in general, i ,, in accordance with the requirements of the Kotelnikov theorem and depending on the chosen sampling frequency F- in the information channel. In this way, the optimum mode of operation of the device by the respective units of the device is established, which allows recording, with different channels, signals with different bands. frequencies, as well as vary the required number of information channels. Claim 1 Много Multichannel device for recording-playback of analog in-. formations containing a block of adders-amplifiers with N input wagons, sum, the peace inputs of which are connected to the first output of the block of reference stresses and the recovery block of information formation signals, the second output of the reference voltage block, the amplifier-adders block and the first control block — with the inputs of the first switchboard, one output of which is connected to the input of the frequency modulator connected by the output to one input of the block of magnetic heads; the second input is connected with the release of the second. Editor C, Baker Order 3621 Compiled by N. Makarenko Tehred L. Oliynyk Proofreader M.Samborsk Circulation 490 Subscription VNIIPI State Committee for Inventions and Discoveries at the FKHT USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Ai Mi . 2