Functional converter

 

(57) Abstract:

The invention relates to computer technology and can be used for functional conversion of analog values in computing machines. The aim of the invention is the representation of the transformation in the form of an analog signal and improve performance of the Converter. To achieve the goal in the Converter introduced the comparator standby multivibrator, two shaper pulses, the integrator and sample-and-hold. In this Converter, the conversion result is generated for one period of the pulse signal as an analog signal. 2 Il.

The invention relates to computer technology and can be used for functional conversion of analog values in computing machines.

The purpose of the invention, the representation of the transformation in the form of an analog signal and improve performance of the Converter.

In Fig. 1 shows the structural diagram of the proposed functional Converter of Fig.2 timing diagrams explaining his work.

Functional Converter comprises a block 1 selection module, an adder 2, integrate is 10, the tire 11 of the reference voltage and the output bus 12.

The input unit 1 is connected to the bus 10, and the output from the second input of the adder 2, the first input connected to the bus 11 and the second input of the comparator 5, and the output information input of the integrator 3, the output of which is connected to the first input of the comparator 5. The input of the multivibrator 6 is connected to the output equal to the comparator 5 and the reset input of the integrator 3, the direct output from the input of the shaper 7 and the inverted output from the information input of the integrator 4, the reset input of which is connected to the output of the imaging unit 8, and the output information input unit 9. The control input unit 9 is connected to the output of the shaper 7 and the input of the driver 8, and the output bus 12.

The function of the Converter is as follows.

To the input unit 1 from bus 10 receives an analog signal with a level of XIsatisfying the condition

About < I XII < A, where a level of the reference voltage of positive polarity coming from the bus 11 to the first input of the adder 2.

The block 1 has a single gear ratio. At its outputs a signal of positive polarity is equal to the module XIof the input signal. This signal is applied to the second in which ihade a signal is generated, level U2which is equal to the difference between the levels of the signals at its first and second inputs:

U2A I XII

The signal level U2from the output of the adder 2 is supplied to the information input of the integrator 3. Under the action signal U2the signal at the output of the integrator 3 linearly increases (Fig.2A) with speed U2/ where is the time constant of the integrators 3 and 4.

The output signal from the integrator 3 is supplied to the first input of the comparator 5, the second input of which receives the reference voltage level And from the bus 11. In moments equality of the signals at its inputs, the comparator 5 generates short pulses (Fig.2B) is supplied to the reset input of the integrator 3 and the input of the multivibrator 6.

The integrator 3 under the action of pulses reset to zero, and then the signal at its output and the first input of the comparator 5 again begins to grow linearly. As a result, the output of the integrator 3 is formed sawtooth voltage (Fig.2B) with period T, determined from the relation

T (1)

Denoting , the resulting ratio can be written in the form

T (2)

The multivibrator 6 under the action of the pulse output equals comparator 5 generates rectangular pulses (Fig.2B) fixed amplitude To the duration of the od of the driver 7. On the inverse of the output of the multivibrator 6 is formed logically inverted signal (Fig.2D) rectangular pulses of amplitude V and duration T which act on the information input of the integrator 4.

The duration T of the pulses on the information input of the integrator 4 with regard to the equation (2) is defined as

T-

(3)

Under the action of the pulse on the information input of the integrator 4 at its output, a signal is generated, in which the duration of the pulse increases linearly from zero with a speed B/ a at the end of the pulse remains at that level (Fig.2D). Level U4signal at the output of the integrator 4 by the end of the pulse duration T his information is

U3=

Taking into account equation (3) can be written

U3= (4)

The output signal from the integrator 4 is supplied to the information input unit 9.

Shaper 7 of leading edge pulses from the direct output of the multivibrator 6 generates the sampling pulses (Fig.2E), which are received at the control input unit 9 and to the input of the driver 8. The duration of these pulses is the lowest available, but to be able to write in block 9 of the signal level at its input. TheU3where TO9the transmission coefficient of the block 9.

This signal is applied to the tire 12. Taking into account equation (4) can be written

U9= K9B

On the trailing edge of the sampling pulse shaper 8 generates a reset pulse (Fig.2ZH), which is fed to the reset input of the integrator 4. The integrator 4 is set to zero (Fig.2D). The following describes the process repeats.

As a result, during one period T at the output of the block 9 and the bus 12 is formed of an analog signal level U9associated with the input signal XIthe required nonlinear dependence.

Thus, the proposed functional Converter performs a non-linear transformation of the form

Y K where X and Y are respectively the input and output signals of the inverter;

And the constant level exceeding the maximum input signal level;

To a constant factor.

When the conversion result is represented in the form of an analog signal.

In the proposed Converter, the conversion result is generated for one period of the pulse signal, which significantly increases the performance of the Converter.

FUNCTIONAL CONVERTER, servy integrator, an information input connected to the output of the adder, characterized in that it introduced the comparator standby multivibrator, two pulse shaper, the second integrator and the unit sample-hold output which is the output function of the Converter, the output of the first integrator connected to the first input of the comparator, the output Equals which is connected to the input standby-flop and the reset input of the first integrator, a second input of the comparator and the first input of the adder connected to the bus reference voltage, the output of the block selection module is connected to the second input of the adder, direct standby multivibrator connected to the input of the first pulse shaper, the output of which is directly connected with the control input of the sample-hold and through the second pulse shaper is connected to the reset input of the second integrator, the output of which is connected with the information input unit of sample-hold inverted output standby multivibrator connected to the information input of the second integrator.

 

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