SU487404A1 - Device for displaying information on the beam tube screen - Google Patents

Description

is a code at the output of register 2, which through the element "NOT 4 and elements" And 11, 12 switches keys 7 and 8.

The time intervals of the device operation are given by voltage pulses from the outputs of the decoder 19 connected to the second inputs of the elements AND 9-12. The inputs of the decoder are connected to the outputs of the counter 18, to the input of which from the generator 17 a continuous sequence of clock pulses is applied.

Thus, during a period of one period, the beam is deflected at each coordinate (or at one of them) by an amount proportional to the resultant value of its magnetic flux, and the indicator beam returns to its original (central) position. In this case, the error in returning the beam to its initial position is determined by the residual magnetic flux Fost in the core of the deflecting system. This error is summed with the deviation of the beam during the last period of operation and reduces the accuracy of the indicator.

In the proposed device, a decrease in the Fost value by about 50 times (and therefore, a corresponding decrease in the error in the position of the indicator beam) is achieved due to an intermediate time deviation interval in which an additional source of a constant input reference voltage equal to about 2% of the maximum possible deviation yush its input signal. In this case, the error in the position of the beam due to the residual flux of the magnetic core core deflecting system in this device is reduced 50 times.

but compared with known similar

devices. In the proposed device

minimized as residual error

the magnetization of the core material so

and other errors having hysteresis

(residual) character.

Subject invention

A device for displaying information on the screen of a cathode ray tube, containing a series-connected generator, a counter and a decoder, keys connected to one input of summing amplifiers connected through deflection amplifiers to the deflection coil half-windings and the main beam deflection register associated with a decoder, with one main element "And connected to the register of the sign of the beam deflection directly, and the other through the element" NOT, characterized in that, with the aim

increase the accuracy of the data output, the source of the reference voltage and additional keys in series are connected to the device and the additional keys are connected to the source of the reference

voltage, and their outputs - with other sinks of the corresponding summing amplifiers; the additional elements "And are connected to the decoder, with one additional element" And connected with the register of the beam deflection sign directly, and the other through the element "NOT.

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