SU909690A1 - Device for reproducing multi-channel signalogram - Google Patents

Description

(54) DEVICE REPRODUCTION MULTIPLE-ALUMINUM

one

This invention relates to a magnetic recording technique, namely, reproducing devices that use skew compensation means.

A skew compensation device is known comprising a playback unit, a block of memory elements, a skew direction determination unit, a delay selection unit, and a polling unit made with a pulse generator and a counter | 1T.

The closest in technical essence and the achieved effect to the proposed one is a multi-channel waveform reproduction device containing a common control bus and channel-f. Each of the blocks is made with a playback head, an input driver connected to the head of the product, output, an output bus, a Memory element connected to the output of the input driver, a trigger, a matching circuit, a shift register, a clock input connected to the output of the match circuit, and terminal shaper.,

SIGNALS

the input of which is connected to the output of the shift register, and the output - to the output circuit C2.

A common drawback of known devices is the deterioration of skew compensation with an increase in recording density due to failures of the block of memory elements.

The purpose of the invention is to increase the reproduction accuracy by compensating for skew.

Claims (2)

This goal is achieved by the fact that a generator is inputted into each channel unit, whose input is connected to a common control bus, with the generator output connected to the first input of the matching circuit in each channel unit, the trigger outputs connected to the second and third matching circuit inputs , the fourth input of the coincidence circuit, the information input of the shift register and the first input of the trigger are connected to the output of the input driver, and the second input of the trigger is connected to the output of the memory element. The drawing shows a block diagram of the proposed device. The device contains channel blocks highlighted by a dotted line in the drawing. Each channel block includes a playback head 1, an input driver, a memory element 3, a trigger 4, a 5-match circuit, a shift register 6, a generator 7, and an end driver 8. Generator inputs 7 and the reset inputs Copies 3 memories are connected to the common control 9. The device works as follows. The control bus 9 is given a signal whose frequency is determined by the recording density and the speed of the carrier. The control signal elements 3 of the memory and the trigger 4 are reset. The reproduced signal through the input driver 2 triggers trigger 4 and memory element 3. At the same time, the reproduced signal is fed to the input of the matching circuit 5, from the output of which the clock signal is fed to the clock input of the shift register. The information input register 6shift provides a signal from the output of driver 2. Information is recorded in D register 6 and shifted to its output. In case of skip recording 1 & signal generator 7 is turned off by a signal from trigger output 4. Memory delay 3 , a signal appears in the first turn of the last, returning the trigger 4 to the initial position, while the signal of the generator 7 shifts the information in the shift register 6. The process then repeats. The signals from the register 6 output through the end driver 8 are fed to the output busses of the device. To determine the skew, the frequency of the oscillator 7 is adjusted in each channel until the signals on the output buses of the device coincide. After calculating the magnitude of the skew in the frequencies of the generator 7, the skew is adjusted & change by the size of the shift register 6. The frequency of the oscillators 7 is set in accordance with the DENSITY and the write speed. When changing the recording density and changing the speed of moving the carrier, the parameters of the generator 7, the memory element 3 and the terminal shaper 8 are changed by the control siphon from the bus 9. The proposed device allows to improve the accuracy of compensation of the cerebrum due to the elements of the preliminary setting. The invention The multi-channel waveform reproduction device containing a common control bar and channel blocks, each of which is made with a reproduction head, is an.-Driver that is connected to the reproduction head, by an output bus, by a memory element connected to the output of the input driver, by trigger, by a circuit a match, a shift register connected by a clock input to the output of the coincidence circuit, and a terminal formformer whose input is connected to the output of the shift register and the output to the output bus e, which is different from the fact that, in order to increase reproduction accuracy by skewing, a channel is inserted into each channel block, the input of which is connected to the common control bus, and in each channel block the output of the generator is connected to the first input of the matching circuit, the trigger outputs are connected with the second and third inputs of the coincidence circuit, the fourth input of the coincidence circuit, the information input of the shift register and the first trigger input are connected to the output of the input driver, and the second trigger input is connected to the element output and a memory. Sources of information taken into account during the examination 1. USSR author's certificate No. 536514, cl. Qll On 5/43, 1975. 2. USSR author's certificate №670966, cl. Gil 5/43, 1978 (prototype).