SU997024A1 - Information input device - Google Patents

Description

The invention relates to automation and computer technology and can be used to prepare data and to enter information into a computer.

A device for inputting information is known, comprising a keyboard, a pulse generator, two blocks of AND elements, two OR elements, a counter, a trigger, an AND element, two details of the generator 1.

The disadvantage of this device is its limited scope.

 A device for inputting information is known, comprising a keyboard, a pulse generator, two blocks of AND elements, two OR elements, a counter, a trigger, an AND element, two decoders, a shift register, a third and fourth OR elements, and a sync pulse generator.

However, in this device it is impossible to form start-stop combinations with a fractional cycle.

The purpose of the invention is to increase the speed of the device by transmitting start-stop code combinations with fractional cycle times.

The goal is achieved by the fact that a device for inputting information containing a pulse generator, a counter, a pulse shaper, the first trigger, the first, second, third and fourth elements OR, the first and second blocks of elements AND, the first and second decoders, the shift register, The first element I and the keyboard 10, the inputs of which are connected to the outputs of the first decoder, the inputs of which are connected to the outputs of the counter, with the inputs of the second decoder and with the inputs of the first block of elements

15 And, the outputs of which are connected to the inputs of the shift register and the inputs of the first element OR, the output of which is connected to the first input of the first trig 2Q, the second input of which is connected to the output of the second element OR, the inputs of which are connected to the outputs of the first keyboard group, the outputs of the second group of which connected to the inputs of the first group of the second block of elements AND, the output of which is connected to the input of the first block of elements AND, with the first and second inputs of the register, the outputs of which are connected to the inputs of the third element OR whose output

30 is connected to the first input of the fourth OR element, the second input of which is connected to the output of the shift register and. To the input of the third OR element, the counter input is connected to the output of the first AND element, the first input of which is connected to the output of the pulse generator, the second input of the first AND element connected to the output of the first trigger; the output of the pulse generator is connected to the third input of the shift register; the outputs of the second de encoder are connected to the inputs of the second group of the second block of elements And; the output of the first element And is the first output of the device oystva outputs of the first unit members and are output group device of the fourth OR gate output. is the second output of the device entered, the second element is And and the second trigger, the first input of which is connected to the output of the third element OR and the first input of the second element AND, the second input of which is connected to the output of the second trigger, the second input of which is connected to the output of the second. Both with the input of the pulse former, the output of which is connected to the third input of the second trigger. The drawing shows the functional diagram of the device. The device contains a keyboard with buttons. 2, the first 3 and the second 4 decoders, the generator .5 pulses the first element AND 6, the counter 7, the first 8 and the second 9 elements OR, the first 10 and the second 11 blocks of the elements And, the first trigger 12 , vegistr 13 shift, the third 14 and fourth 1 elements OR, shaper 16 pulses, the second trigger 17, the second .I element 18. The device works as follows. In the initial state, the counter 7, the shift register 13 is set to. At the output of the element OR 14, there is a low potential that goes to the inverse input of the element OR 15 and forms a high (stop) potential at the last output. This potential arrives at the installation input to trigger 17, but does not cause any changes in the state of trigger 17, since it is controlled by M. At the output of element And 18, there is also a low potential, since its inverse input enters O from element OR 14, to right my input h with. inverse trigger output 17. A low potential from the element output And 18 enters the control input of the pulse shaper 16 and blocks it, while entering the inverse, the input of the hera 17, confirms the trigger status 17. Using buttons 2, the connection of the selected p Dot and keyboard columns 1. When one of the buttons is pressed through the OR 9 trigger element, the ger 12 is set to allow the impulses of the generator 5 to pass through the AND element to the counter 7. The number of pulses passes to the input of the counter 7 and the device output, respectively Leica Geosystems number by pressing. Jlpi this is triggered by one of the elements of the block of elements AND 10, and through the block of elements AND 11 to the output of the device and also to the inputs of the eleieHTA OR8 and shift register 13 receives a parallel code corresponding to the number of the button pressed. This code is recorded in the shift register 13 and through the element OR B. sets the trigger 12 to the state that prohibits the generator 5 from passing to the counter 7. Simultaneously with the arrival of the code at the information inputs of the shift register 13 to its start-stop input from the output of the first block of elements And 10 gating pulse arrives. The strobe impulse arriving at, input a, writes to the high-order bit of the shift register 13 the whole part of the stop parcel, i.e. , and the younger time is through the inverse Start input, i.e. A. In the case of writing to the shift register 13 at least one unit (for example, Stop) at the input of the OR element 14, a high potential appears, which is fed to the inverse of the input of the AND 18 element and to the input of the setting in i of the trigger 17, At the output. And 18 appears at; | high potential, which unlocks the input of the installation in O of the trigger 17 and starts the pulse shaper 16. Since the installation input of the trigger 17 is unlocked. and a high potential arrives at the installation input, then the trigger 17 is set to 1. The clock pulses from the pulse generator and the counting input, the shift register 13, with their falling edge shift and sequentially recorded in register 13 information, which through the OR 15 element enters the device output. The Release bits are written O by connecting a serial input to the O (Earth) potential. The clock pulses arriving at the counting input of the trigger 17 do not cause a change in the state of the latter, since the trigger 17 is blocked in the one state at the input of the setting. the output of the element OR 14. At the time, when in all bits of the register 13 shift will be written O

(the shift register is set to O at the output of the element OR 14 a low potential appears again, which unlocks the installation input to the i trigger 17, but since the direct input of the And 18 element still has a lower potential (the trigger 17 is in state), the driver 16 no pulses will be blocked.

When the next clock pulse arrives at the counting input of the trigger 17, the leading edge of the pulse changes the state of the trigger 17 (sets to O), since the counting inputs of the shift register 13 and the trigger 17 are mutually inverse. From the inverse of the trigger 17 to the input element And 18 enters the high potential. At the output of element 18, a low potential appears which blocks Forkshrovatel 16. Pulses. Thus, a fractional cycle has been formed, and the fractional part of the stop parcel depends on the duty cycle of clock pulses. So with squiggle equal to 2, for the MTK code. You can get 7.5 contact division and increased speed compared to the prototype.

The proposed device allows to convert the initial information outputted from the keyboard into input information with an arbitrary co-tactic division with the arthtop combination. This device can be directly used for transferring information to punched tapes or punched cards, and. to enter information into the computer through a communication line in the inter-irood telegraph code MTK-2, characterized by 7.5 contact division.

Claims (2)

1. Author's certificate of the USSR 666536, cl. G 06 F 3/02, 1979. 2.Assignment of the USSR on the application 2901029 / 18-24, 5 cl. G 06 F 3/02, 1980 (prototype).