SU696526A1 - Digital information recording apparatus - Google Patents

Description

one

The invention relates to the field of instrumentation and can be widely used in the development of magnetic recording devices.

High density recording devices are known, comprising a magnetic recording head, a counting trigger, inverters and output transistors and coding circuits 1.

The disadvantage of this device is its technical complexity, which makes it difficult to widely apply such solutions in practice.

The closest in technical essence is a device for recording digital information containing a magnetic recording head associated with two transistors, the base of each of which is connected via an inverter to the information code bus, and the collector is connected to a limiting resistor, capacitor and write resolution buses and power 2.

A disadvantage of this device is its complexity.

The aim of the invention is to simplify the device and ensure reliable erasure of information in the mode of preparing magnetic media for a new recording.

This goal is achieved by the fact that the device contains a magnetic recording head associated with two transistors, the base of each of which is connected via an inverter to the information code bus, and the collector is connected to a limiting resistor, as well as individual third limiting resistor, capacitor write and power enable buses, a trigger is inserted between the information code bus and the first inverter inputs, the second inputs of which are connected to the write resolution bus, while the collectors of transistors are connected These are connected through the first two limiting resistors to the power bus and are connected to each other via serially connected magnetic recording heads and a third limiting resistor, in parallel with which a capacitor is connected.

Claims (2)

In the erase mode, the resistor and capacitor are blocked by a switch (relay). Such a circuit construction allows for recording and, more specifically, for playback, to obtain a narrower impulse from a magnetic carrier. improves the dynamic response of the recorded pulse. . The drawing shows a functional diagram of the device. It consists of a magnetic recording head 1, the output ends of the winding of which are connected to the collectors of the output transistors 2, 3 and the limiting resistor 4 and 5, as well as one end to the third resistor 6, the capacitor 7 and the switch 8. Base output transistors 2 and 3 through inverters 9 and 10 are connected to the output of the counting trigger 11, to which information (code) is received from the computer. Bus 12 is connected to one of the inputs of inverter 9 and 10, through which write permission signal is received from the write signal. The device works as follows. When the Record mode is turned on and the computer, the bus 12 receives a signal that resolves the operation of inverters 9 and 10 (this principle of functional construction is typical of all recording devices). With the arrival of the information code on the counting trigger 11, the status changes depending on the alternation of zeros and ones. As a result, transistor 2 is open, and the current flows through both resistor 4 and magnetic head 1 at the first moment and through capacitor 7, and then through resistor 6 and resistor 5 when transistor 2 closes and current transistor 3 flows through the resistor 5, the capacitor 7 (at the first moment), the resistor 6, the magnetic head 1 and the resistor 4. When one or the other transistor opens (2 the current immediately rises to its maximum value. At the same time, there is a parallel circuit for the current 7, resistor 6 and magnetic head 1. In As a result, when the circuit operates on the capacitor 7, the supply potential is almost full, and therefore, on the winding of the magnetic head 1. This creates favorable conditions for equipping a sufficient, but short-term magnetic flux in govka 1, which leads to a narrow magnification of the pulse trace on the magnetic carrier. After the capacitor 7 is charged, the amount of current in the head 1 drops sharply due to the inclusion of resistor 6 in operation, claims 1. A device for recording digital information containing a magnetic head records associated with two transistors, each base of which through an inverter is connected to the information code bus, and the collector is connected to a limiting resistor, as well as individual third limiting resistor, capacitor and write and power buses, characterized in that in order to simplify the device, a trigger is inserted in it connected between the information code bus and the first inputs of the inverters, the second inputs of which are connected to the write resolution bus, while the collectors of the transistors are connected through the first two limiting resistors to the power bus and connected to each other through serially connected magnetic recording heads and a third limiting resistor, in parallel with which a capacitor is connected. 2. Device POP.1, characterized in that, in order to increase the reliability of erasing information from magnetic media, it is equipped with a switch connected in parallel with the third limiting resistor. Sources of information taken into account during the examination 1. USSR author's certificate No. 372834, cl. G 11 B 5/09, 1976. 2, US Patent No. 3,665,425, .cl. 340-173, pub. 1972 (prototype).