KR940005336Y1 - Waveform generator used for one chip computer - Google Patents

Abstract

No content.

Description

Waveform Generator Using One Chip Computer

1 is a block diagram of the present invention.

* Explanation of symbols for main parts of the drawings

1: RESET KEY 2: Single Key

3: continuous key 4: oscillation circuit

5: external connection terminal 6: display device

7: One chip computer 8: OR GATE

9: multiplexer 10: counter

11: Latch Circuit 12a-12d, 14a-14d: Latch Buffer

13a-13d: ROM 15: D / A Converter

16: Buffer SW ₁ -SW ₂ : Switch

The present invention relates to a device capable of generating waveforms by using a one-chip computer. Particularly, a waveform that is frequently used or a specific waveform that is difficult to obtain is stored in a ROM and controlled as a one-chip computer. The present invention relates to a waveform generating device capable of withdrawing the.

In general, in order to measure or inspect the intermediate inspection or special equipment, electronic components, etc. during the production of various electronic products, it is necessary to give a specific waveform.

Therefore, in the past, a circuit capable of generating a specific waveform was formed to satisfy the inspection conditions. However, if various waveforms are selectively changed according to the situation and a measurement or inspection condition is given, it is not possible to quickly cope with the conditions. In the case of separately producing circuits that generate waveforms, the circuit configuration is complicated and lacks precision, which makes it difficult to expect accurate measurement or inspection efficiency, and it is difficult to construct circuits for acquiring special waveforms.

Therefore, the present invention is designed to solve the above problems, and stores data of various waveforms required for measurement and inspection conditions in a number of ROMs, and controls them as one-chip computers to program appropriate waveforms according to a suitable situation. It is an object of the present invention to provide a waveform generator that can obtain a specific waveform easily as well as giving accurate measurement and inspection conditions by outputting by.

Hereinafter, described in detail by the accompanying drawings as follows.

As shown in FIG. 1, a one-chip computer for selectively controlling whether a reset key (1), a single key (2), or a continuous key (3), which determines the driving state of the waveform generator, is supplied once or continuously. Each of the latch buffers 12a-12d and 14a-14d is connected to (7) to apply an enable signal, and latches an address output to control the INHIBIT of the multiplexer 9. The oscillator circuit 4 for generating a pulse and an apparatus capable of generating a pulse externally are connected to one side end of 8) and a multiplexer 9 for selecting and outputting an oscillator circuit 4 and an external connection terminal 5 for output. The external connection terminal 5 to be connected is connected to the multiplexer 9 and the one-chip computer 7 via the switches SW ₁ and SW ₂ , and the signal input to the multiplexer 9 is counted and the ROM 13a-is connected. 13d) to the counter 10 for selecting the address, and the output signal of the counter 10 (2) and the other end of the one-chip computer 7 and the ora gate 8 through a latch circuit 11 to reset the continuous key 3 to be selected, and the count signal of the counter 10 is a latch buffer. Amplify the output signal and the D / A converter 15 which converts the ROM 13a-13d, the latch buffer 14a-14d, the digital signal into an analog signal, and selects an address of 10 bits or less via 12a-12d. It is a waveform generating device using a one-chip computer to be output via the buffer 16 to be.

Referring to the effect of the present invention made of the configuration as described above are as follows.

First, the data of special waveforms, frequently used waveforms, or various waveforms giving measurement and inspection conditions are stored in each ROM 13a-13d. Then, the one-chip computer 7 stores the data output of the ROMs 13a-13d. After the control, the frequency value at that time is displayed on the display device 6, and the program is stored so as to proceed according to the operation of the key 1-3.

In this state, the measurer selects the oscillator circuit 4 by deciding whether to supply a single waveform or a continuous waveform as the single key 2 and the continuous key 3, and then turn on the switch SW ₁ . In the ON state, the oscillation frequency output from the oscillation circuit 4 is applied to the counter 10 through the multiplexer 8 and transferred to the one-chip computer 7 to output any waveform due to its oscillation frequency. The enable signal is applied to the latch buffers 12a-12d and 14a-14d so that the data stored in the required oscillation frequency waveforms can be outputted.

At this time, the oscillation frequency through the multiplexer 9 is counted by the counter 10 to select the addresses of the ROMs 13a-13d and via the latch buffers 12a-12d to which the enable signal is applied. Since the data of the stored waveform is transmitted to the D / A converter 15 through the latch buffers 14a-14d.

Therefore, the D / A converter 15 converts the digital data of the oscillation frequency waveform stored in the ROMs 13a to 13d into an analog signal, and then amplifies the buffer 16 to output a waveform having a specific frequency value. In addition to giving conditions suitable for the inspection object, the one-chip computer 7 displays the oscillation frequency value output from the buffer circuit 16 as a numerical value on the display device 6 to confirm whether the desired oscillation waveform is output. do.

The OR gate 8 latches the most significant address output of the ROMs 13a-13d to control the INHIBIT signal of the multiplexer 9.

On the other hand, when the reset key 1 is operated, the latch circuit 11 resets the counter 10 and the one-chip computer 7 does not apply an enable signal to all the latch buffers 12a-12d and 14a-14d. Therefore, it is possible to initialize the waveform generator, and to connect the device capable of generating the waveform to the external connection terminal 5 so as to output the data of the waveform required for the ROMs 13a-13d.

The present invention, which operates as described above, gives oscillation frequency when inspecting a specific product or equipment, or stores frequently used waveform data in a plurality of ROMs (13a-13d) and sends them to the one-chip computer (7). It is a useful invention that expects the efficiency of inspection by easily obtaining a special waveform by giving a proper inspection and measurement condition by outputting an appropriate waveform by a program.

Claims (1)

In a waveform generator, a one-chip computer for selectively controlling whether a reset key (1), a single key (2), or a continuous key (3), which determines the driving state of the waveform generator, is to be supplied once or continuously. 7) each latch buffer 12a-12d (14a-14d) is connected to apply an enable signal and latch an address output to control the suppression of the multiplexer 9. An external connection terminal for connecting the circuit 4 and the multiplexer 9 for selecting and outputting the external connection terminal 5 and for connecting the oscillation circuit 4 for generating a pulse and a device capable of generating a pulse from the outside ( 5) is connected to the multiplexer 9 and the one-chip computer 7 via switches SW ₁ and SW ₂ , and the multiplexer 9 is used to count input signals to select addresses of the ROMs 13a-13d. Connected to the counter 10, and outputs the output signal of the counter 10 to a single key (2), continuous key (3) Is connected to the other end of the one-chip computer 7 and the oragate 8 through a latch circuit 11 for resetting the selection, and the counter signal of the counter 10 receives an address via a latch buffer 12a-12d. It is configured to be output through the selected ROM (13a-13d), latch buffer (14a-14d), D / A converter 15 for converting a digital signal into an analog signal and a buffer 16 for amplifying the output signal. Waveform generator using a one-chip computer.