SU1310889A1 - Information display device for logic analyzer - Google Patents

Abstract

The invention relates to information display devices and is intended to reproduce signals from digital systems on a gas discharge matrix indicator. The invention makes it possible to increase the reliability of reproducing information by reproducing holistic graphs during the full period of the reverse sweep, reproducing the time axis and highlighting the high-impedance state. For this purpose, a device comprising a gas-discharge matrix indicator 1, a block 2 of switching elements, a voltage adder 3, a synchronization unit 4, a scanning unit 5, an image forming unit 6 including an HE element 7, four AND 8-II elements, two trigger 15 and 16, additionally included three elements OR NOT 12-14. The image formation is carried out by decoded input signals fixed at the time of connecting the next indicator column, with the edges of the pulses being formed during the forward direction of the sweep, and the sections during the reverse. 1 il. $ e CO about 00 00; o

Description

The invention relates to information display devices and is intended to reproduce signals from digital systems on a gas discharge matrix indicator.

The purpose of the invention is to increase the reliability of information reproduction.

The drawing shows a block diagram of the proposed information display device for a logic analyzer.

The device contains a gas-discharge matrix indicator 1, a unit 2 of switching elements, a voltage adder 3, a synchronization unit 4, a scanning unit 5. The imaging unit 6 includes the element NOT 7, the first, second, third and fourth elements AND 8-11, the first, second and third elements OR-NOT 12-14, the first and second triggers 15 and 16. The elements 17 and 18 informational inputs of the device are indicated, and 19-2 are its outputs of the next value and synchronized output, the voltage adder 3 contains a diode 22 and a resistor 23.

The device works as follows.

When the sync unit 4 forms the next pulse arriving at the control input of the sweep unit 5, the latter provides a connection to the queue column of the matrix panel 1. At 17 and 8 inputs of the device, which are the information inputs of the imaging unit 6-1, this time is maintained the previous code value, which can take one of three values: 00, P, 01, which corresponds to the input signals of a logical zero, a logical one, and a high-mute state. When forming a signal at the fifth output of the synchronization unit 4, the decoded value of the input code is entered into the first and second triggers 15 and 16. The first trigger 15 will be set to state “1 if the input code is 01, and therefore the output signal of the high impedance state decider performed on the HE 7 and AND 8 elements is logic level 1, the second trigger 16 is set to the state “On if the input code is equal to 00.”. Recalling the previous state corresponds to Bounan; its logical unit is not performed, since it does not participate in the formation of the image. The next sigals of the synchronization unit 4, generated at its third (fourth) output, call the next value of the current ordinate to the inputs G / and 18 of the device.

The current value of the input code, corresponding to a logical one, zero, or high-impedance state, is supplied to the third, eleventh, and

five

0

five

0

five

0

five

0

five

through the second element OR NOT 13 to the seventh input of the unit, commits 1 of 2 elements, providing the excitation of the horizontal width of the display panel corresponding to the current value of the input code. If the current and previous values of the input code are equal, or the previous value of the input code is greater than the current one, then the output signals of elements 9 and 10 are equal to zero and, consequently, no additional fields are generated; 1and not produced. If the current value of the input code is larger than the previous one, then using the elements OR-NO 12-14, signals are generated that provide the excitation of additional women located between the streams corresponding to the current and previous input codes.

Next, a scanner 5 connects the next column to the singing, and the image formation process appears.

After reproduction of the image in the last column of the panel, the order of connecting its columns, and, consequently, the order of receipt of information from the storage device, is reversed. In order for the image corresponding to the current values of the input code to coincide during the forward and reverse sweep, it is necessary that when reproducing the image on the i-th column, the same je code value associated with the given indicator column was supported at inputs 17 and 18 payelp Due to the fact that the sequence of information arriving at the information input of the device during the forward and reverse sweep is opposite, during playback of the image on the ith column, during the forward sweep, the previous one will be (J-1) - ordinate, and during the reverse - (J + 1) -. Investigator 15o, if during the forward connection of the columns the current code value was the previous one, then in the reverse order its inequality changed to the opposite, i.e., in the reverse order of connecting the columns with the output signals of the first, second and third the elements OR-NOT AND -13 is carried out by excitation (; additional cells, if je the value of the input code is less than the previous (j ---) -th.

Since the bus voltage corresponding to the zero input code is constantly supplied with a voltage across the resistor of the voltage adder 3, its cells are constantly excited. The resistance of the resistor of the voltage adder 3 is chosen so that, when the columns of the display panel are connected in series, the image of the line (pox time) with a brightness 5-8 times smaller than the main image is displayed.

The cells of this bus, successively ignited, are a source of ionizing particles and metastable atoms and provide high reliability of image formation for this channel. Indeed, the image corresponding to the zero input code is synthesized from hot cells that reproduce the time axis. The HUIH cells, corresponding to a high-meridance state or logical unit, are excited with the additional excitation of cells, which ensure the formation of pulse fronts in the forward sweep direction and pulse cuts in the opposite direction. The continuity of the illumination by burning information cells or cells that reproduce the time axis is violated if, after reproducing a signal corresponding to a logical unit, a signal is reproduced corresponding to its high-impedance state.

To ensure high reliability of ignition of the cells involved in the synthesis of the image corresponding to the high impedance state, when a signal is received during the first half of the connection time of the panel column with the output signal m of the fourth element And 11, additional cells are excited. located between the women reserved for reproducing the zero and high imperative states. Reproducing this image in the form of a histogram allows one to greatly simplify the operator's perception.

The coincidence of the images that form my.x with a.m. and o6paTfiOM for the connection of columns is ensured by the fact that the connection time of the first and last columns of the panel is twice as long as the rest of the panels. O and the last column, respectively, during forward and reverse sweep by the synchronization unit 4, the next value from the storage device is not called. The synchronous operation of the scanner and the storage device is ensured by forcing the last sync signal (21) of block 4 into operation when forming the image on the first column in the direct order of their connection.

Claims (1)

Invention Formula An information display device for a logic analyzer comprising a synchronization unit, a scanning unit, n image formers, a gas discharge matrix indicator, the vertical buses of which are connected to the outputs of the scanner, the control input of which is connected to the first output of the synchronization unit. 0 five 0 five 0 five 0 five 0 five the sweep direction input and the sign input of the extreme.x columns of which are connected respectively to the first and second outputs of the scanner, the second, third and fourth outputs of the synchronization block are the synchronization outputs and the call outputs of the next value of the device, the fifth and sixth outputs the synchronization unit is connected respectively to the first and second synchronization inputs of each of the n image formers, the first and second inputs of each of the n image formers are respectively (2 -1) 2n-mi and data inputs of the device, each of the n for.mirovateley image includes three elements I. Two trigger element ielt PC. block com yh tpruspp l 3,; oMCiiTOis. from nepBoi o to the eighth outlets of which they were joined by |; o 1b with cuorBelvtvyk) 1 op :-( ont; 1lpy-MI ninamp 1 azoG); Zrn; 111O-o; an articulate indicator, the first and second |) th inputs of the switch box: auxiliary switches. shpen.y with tinny HfrrainiH and 1pipy ny.ieBoro noTCHiuia. ia set-poik TBH cooTBerc i iioiiiio. The cniixpoiiii3np ioimie inputs of the first and ivropoi o triggers are connected to the first sync controller. : the imager of the imager, the output of the y, 1 terminal of the Hii is connected to the first input of the nepBoi o of the element I, or the first time {. for example, in order to increase the reliability of reproduction of information, the first, second, and third OR-MN elements, a voltage adder containing a diode, and, the first input of the voltage adder are connected to the Pt bus of the device, and the second input is connected to each Ninety m input of the switching element unit, the output .1. of the voltage armature is connected to the ninth horizontal bus of the gas discharge matrix indicator, the input element is NOT to the second input of the first element AND the imaging device are connected respectively to (2n-1) and The 2n-th informational inputs of the device, in each image framing device, the first inputs of the second and third elements I are connected to the input of the NOT element, the second inputs of the second and third elements I are connected respectively to the right and inverse outputs of the first and second triggers, the output of the first element AND is connected to the information input of the first trigger and the first inputs of the second element OR NOT and the fourth element AND, the second input of the first element AND is connected to the information input of the second trigger, the output of the element is NOT connected to the third input of the block of switching elements, the output of the second element AND is connected to the first input of the first element OR NOT, the output of which is connected to the fourth, fifth and sixth inputs of the block of switching elements, the output of the third element AND is connected to the second inputs 1310889 5w the first and second elements OR NOT and the eighth, ninth and tenth inputs by the block input of the third element OR NOT, the eleventh output of the second element OR NOT is connected to the input of which the second element of the second triggering input, the second the input of the four elements, the output of the fourth element of the right element, and is connected to the second syn is connected to the second input of the third element-chronizing input of the OR or NOT device, the output of which is connected to the image.