SU758182A1 - Device for dividing analogue signals - Google Patents

Description

The invention relates to analog computing and can be used to divide analog signals of either polarity.

A device for division with AGC and time division channels is known, containing two switches, and in the AGC circuit there is a comparison circuit, a feedback amplifier, and an adjustable amplifier (1). This divider is suitable for dividing both constant and alternating voltages.

The disadvantages of this device, primarily temporary and temperature instabilities, exclude the possibility of their widespread use. A time division device has limited speed.

A device is known that contains a mixer, a voltage addition unit, and in an AGC circuit, a band-pass filter, a comparison circuit, a feedback amplifier, and an adjustable amplifier [2]. _m

The disadvantage of the device is that this device division does not provide the sensitivity of the private to the sign of the input signals.

2

The closest technical solution to the invention is a device for dividing analog signals, containing two amplitude modulators, the first inputs of which are respectively the first and second inputs of the device, the filling frequency generator, the output of which is connected to the second input of the first amplitude modulator, the summing unit, the first and second inputs which are connected respectively to the outputs of the first and second amplitude modulators, the first amplitude detector, the first controlled amplifier and filter, the output to orogo connected to the control input of the first controlled amplifier (3).

The disadvantage of this device is the lack of sensitivity of the output voltage to the polarity of the input signals of the dividend and divider.

The purpose of the invention is the expansion of functionality due to the dependence of the sign of the polarity of the input

signals.

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This goal is achieved by gems, that a phase shift block of 90 ° is entered into the device, the input of which is connected to the output of the filling frequency generator, and the output - to the second input of the second amplitude modulator, subtraction unit, the inputs of which are connected to the outputs of the first and second amplitude modulators, block multiplication of voltages, a sign generator, a quad, a second amplitude detector, a second controlled amplifier and a private generator, the output of the summing block is connected to the input of the quad and the first inputs of the block Voltage and sign forming unit, to the second inputs of which the output of the subtraction unit is connected, the output of the Quad is connected to the input of the first amplitude detector, the output of which is connected to the input of the first controlled amplifier, the output of the first controlled amplifier is connected to the input of the filter, the output of the voltage multiplication unit is connected to the input the second amplitude detector, the output of which is connected to the input of the second controlled amplifier, the controlled input of which is connected to the output of the filter, and the output is connected to the first in ode private forming unit, to the second input of which is connected the output formation unit sign formation chastnogb output unit is an output device.

The drawing shows a functional diagram of the device.

The device contains a first amplitude modulator 1, a second amplitude modulator 2, a generator 3 filling frequency, a phase offset by 90 ° unit 4, a summing unit 5, a subtraction unit 6, a voltage multiplying unit 7, a sign generation unit 8, a quadr 9, a first amplitude detector 10 , the second amplitude detector 11, the first controlled amplifier 12, the second controlled amplifier 13, the filter 14, the block 16 of the formation of the private, the first input 16 of the device, the fluorine input 17 of the device, the output 18 of the device.

The device for dividing analog signals works as follows.

At the first input of the amplitude modulator 1, a voltage is supplied and, the signal of the dividend and at the same time continuous oscillations from the generator 3 of the filling frequency are fed to the power input of the first amplitude modulator. The first input of the second amplitude modulator 2 receives voltage and ₂ signals of the divider and at the same time continuous oscillations from the output of block 4 of the phase shift by 90 ° are supplied to the second input of the second amplitude modulator 2.

Signal! sinusoidal shape, obtained at the outputs of amplitude modulators 1 and 2,

four

independent and orthogonal. If not changed

polarity of input signals, there is a change in the phase of the oscillations received at the outputs

amplitude modulators 1 and 2 at 180 °.

From the outputs of the amplitude modulators 1 and 2, the signals arrive at the inputs of the summing unit 5 and at the inputs of the subtraction unit 6 simultaneously. The summing unit 5 and the subtraction unit 6 perform sum-difference conversions of independent signals received from the outputs of amplitude modulators 1 and 2. After the sum-difference conversion, a signal is generated, the value of which is proportional to the cross-correlation coefficient at the same time points of the signals, from the outputs of the summing block 5 and block 6 subtraction.

The formation of this voltage is as follows.

The output signal from the summing unit 5 and the output signal from the subtraction unit 6 are fed to the first and second inputs of the voltage multiplying unit 7, respectively. Simultaneously with the process of multiplication in block 7, the signal from the output of summing block 5 is fed to the input of quad, 9, the amplitude of the signal at the output of which is equal to the square of the input voltages. From the output of the quadrant 9, the signal is fed to the input of the first amplitude detector 10, the output of which is allocated the signal envelope proportional to the amplitude of the voltage. From the output of the quadrant 9, the signal envelope, which is distinguished at the output of the first amplitude detector 10, is fed to the signal input of the first controlled amplifier 12, for which an amplifier with a controlled transmission coefficient is used. The signal from the output of the first controlled amplifier 12 is smoothed by the filter 14 and simultaneously enters the control input of the first amplifier 12 and the control input of the second controlled amplifier 13. This signal is a control signal. The transmission factors of the controlled amplifiers 12 and 13 are inversely proportional to the magnitude of the control signal. After the detection of the signal received from the output of the voltage multiplication unit 7, the output of the second amplitude detector II is allocated the signal envelope proportional to the amplitude of the signal from the output of the voltage multiplying unit 7. Then the signal envelope, which is distinguished at the output ’of the second amplitude detector II, is fed to the first input of the second controlled amplifier 13, the control input of which is supplied with a control signal from the output of the filter 14. Thus, at the output of the second controlled amplifier 13, we obtain a signal whose amplitude is prononal

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at the same time points _L (0) signals, e output of summing unit 5 and subtraction unit 6, which is proportional to the quotient of dividing divisible II) by divisor and ₂ . Therefore, the magnitude of the signal at the output of the second controlled amplifier 13 is proportional to the ratio of the signal of the dividend II ₍ and the divider is 11 ₂ and is equal to 4 ^; ·

The signals from the outputs of the summing unit 5 and the subtraction unit 6 are fed to the inputs of the sign generation unit 8, which operates according to the principle of determining the magnitude of the phase shift of the signal from the output of the subtraction unit 6 relative to the signal from the output of the summing unit 5. _{2 of} one polarity (negative or positive), then the phase shift of the differential voltage relative to the total is greater than 180 °. If the voltages of the signals of the dividend and, and divider and ₂ have different polarities, then the phase shift of the differential voltage relative to the total is less than 180 °. The voltage at the output of the sign forming unit 8 is unambiguously related to the magnitude of this phase shift and has a positive polarity with a phase shift greater than 180 ° and a negative polarity with a phase shift less than 180 °. At the first input of the private generation unit 15, a voltage proportional to the value of the private enters, and a voltage uniquely associated with the private sign enters the second input of the private generation unit 15. At the output of the partial formation block 15, a signal is generated, the amplitude of which is proportional to the amplitude of the signal received from the output of the second adjustable amplifier 13, i.e. the value of the quotient from dividing the input signals taking into account the polarity of the signal of the dividend II [and the signal of the divider and ₂ .

The proposed device for dividing analog signals of any polarity has the advantage of providing the sensitivity of the input-signal-private signal, i.e. signals divisible and, and divider 1) ₂ . This advantage is achieved by introducing elements that are directly involved in the formation of frequent, namely: a phase shift block by 90 °, a subtraction unit, a voltage multiplier unit, a quad, as well as by introducing a sign generation unit and by final formation of a private, taking into account the polarities of the input signals in the block formation of private.

Claims (1)

Claim Device for dividing analog signals, containing two amplitude modulators, per6 the output inputs of which are, respectively, the first and second inputs of the device, the filling frequency generator, the output of which is connected to the second input of the first amplitude modulator, the summing unit, the first and second inputs of which are connected respectively to the outputs of the first and second amplitude <modulators, first amplitude detector, first controlled amplifier and filter, the output of which is connected to the controlled input of the first controlled amplifier, characterized in that, in order to extend the functionality by means of Ensuring the dependence of the sign of the input on the polarity of the input signals, a phase shift block by 90 ° is entered into the device, its input is connected to the output of the filling frequency generator, and the output is connected to the second input of the second amplitude modulator, subtraction unit, the inputs of which are connected to the outputs of the first and second amplitude modulators, voltage multiplication unit, sign generation unit, quadrator, second amplitude detector, second controlled amplifier and private generating unit, the output of the summing unit is connected to the input square The quad output is connected to the input of the first amplitude detector, the output of which is connected to the input of the first controlled amplifier, the output of the first controlled amplifier to the input of the filter, the output Voltage multiplication unit is connected to the input of the second amplitude detector, the output of which is connected to the input of the second controlled amplifier, the controlled input of which is connected to the output of phi and the output is connected to the First input of the private generator, the second input of which is connected to the output of the sign generator, the output of the private generator is the device output.