SU597088A2 - Time-scale converter - Google Patents

Description

(54) TIME-TRANSFORMER

The invention relates to a pulse technique, in particular, to devices for measuring one-time fast processes of micro- and deposition of time ranges, built on the principle of scale-time or signal conversion. A time-scale converter is known that contains a fast-acting memory tube, blocks that prepare the screen for writing, writing and reading information on a memory block connected to a digital converter, and blocks that compensate for geometric distortions in the electron-beam storage tube to which TC units of formation of coordinates Xi Y of read signals are a block of selected - correction signal by segments ienta, switching field encoder, inverter direct additional check code to code and one adder. For the scale-time converter of the indicated construction, besides the systematic amplitude error on the working field (2-3%), the characteristic dynamic error, ve, which depends on the slope of the signal being converted, which is especially manifested when converting signals with a slope of more than 60 ° . These faults lead to the dissipation of the impulse of the schitshan at the exit of the CRT. The dynamic error in a certain ordinate of a signal can be several times greater than the amplitude one. When converting steep signals (more than 60 °) for maximum working intervals (Nm.) In the order of 70 µs, the measurement error reaches 5%, and at smaller intervals it can reach 10%, which significantly affects the accuracy of the conversion. In order to evaluate the accuracy of the scale conversion, a W-time converter containing memory of a cathode ray tube, a write sweep generator, a backlight pulse generator, a trigger, a read raster generator, a calibration unit, a read unit, an automation unit, an indication unit, a digital conversion unit, X and Y coordinates forming units of the read signals, the block of the correction signal allocation by segments, the block of determining the sign of the correction coefficient, the switching field, the encoder, the transform Direct code into the additional reverse code and adder, which are included in such a way that the input X of the X and Y forming units of the coordinates are connected to the outputs of the digital conversion unit, the segment separation signal separation unit connected through the switching field, the encoder and direct code to additional converter with an adder, the second input of which is connected directly to the digital conversion unit, and between the formation unit U - coordinates and the direct converter An additional block of determining the sign of the correction coefficient is included in the code, a block of formation of the read signal is inserted, connected between the output of the block of readout and the input of the memory block, and the block of formation of the angular correction coefficient, the first input of which is connected to the output of the memory block, second to one of the outputs of the digital conversion unit, and the output to the third input of the adder.

The drawing shows the functional diagram of the time-scale converter.

The scheme contains a write scan generator 1, a backlight pulse generator 2, a trigger 3, a storage bin 1, a read raster generator 5, a calibration unit 6, a read unit 7, an automation unit 8, a memory block 9, a display unit 10, a digital conversion unit 11, X-coordinate generating unit 12, Y-coordinate generating unit 13, block 14 for extracting the correction signal by segments, block 15. Determining the sign of the correction coefficient, adder 16, switching field 17, frame 18, direct code-to-converter converter body reverse code 19, the read signal forming unit 20, and the angular correction factor generating unit 21.

The device works as follows.

The read information pulses from block 7 arrive at block 20, from the output of which rectangular impulses are removed, the amplitude of which is sufficient to trigger subsequent blocks of the device.

The position of the front of the formed pulse on the time axis is determined by the instant of intersection of the front of the read pulse by the level of the threshold voltage, and the position of the decay is determined by the moment of intersection of the fall of the read pulse, respectively, with this level. The level of discrimination itself is usually chosen so that it is five times higher than the noise level.

The generated information signal from block 9 is fed to block 21, which represents a conventional time interval-code converter, which includes the pulse counter on the leading edge of the input pulse, and stops on a predetermined front. Thus, depending on the duration of the incoming pulses, which corresponds to different angles of inclination of the recorded signal and the read line at the output of block 21, a binary eight-digit code appears.

To determine the center of intersection of the read line with the potential relief and compensate for the dynamic angular error, the eight-bit code is halved and half is added to the main interval between the start of line pulse and the leading edge of the read signal.

Claims (1)

1. USSR Author's Certificate No. 539595, H 03 K 13/18, 1976. Login Login / signal