SU543951A1 - Root frequency converter - Google Patents

Description

one

The invention relates to computing and can be used in computers to obtain a functional relationship between the frequencies of the input and output signals, and also as a multiplying device.

A device is known for raising to a power, a special form of voltage generators, key elements, amplifying elements and comparing element ij. This device has a low tonality of computational operations.

A root-frequency frequency converter is also known, containing successively connected input pulse width driver, pulse amplitude driver, scaling resistor, amplifier, and output generator, the output of which is connected to the control element of the key element, between the input and output of which the metering capacitor is switched filter capacitor, one plate of which is connected to the zero potential bus, and the other plate is connected to the input of the key element and the input amplify l, the second input of the pulse amplitude driver is connected to the output of the reference voltage source 2j.

However, this device also has a relatively low accuracy due to the lack of compensation for conversion error.

The aim of the invention is to improve the accuracy of the conversion.

To do this, an inverting amplifier is inputted into the device, the input of which is connected to the reference voltage source, and the output is connected to the output of the key element, the control input of which is connected to the auxiliary input of the input pulse width generator.

. The drawing shows the structural electrical circuit of the proposed root-extracting frequency converter.

Claims (2)

The pre-phase switch contains input pulse voltage 1, pulse forming, pulse amplitude rover 2, reference voltage source 3, scaling resistor 4, filtering capacitor 5, or b, output generator 7, key element 8, metering capacitor 9, Inverting amplifier 1O, input 11 converter, output 12 converter. The device works as follows. The input 11 of the converter, which is one time is the input of the input form of the pulse width 1, receives the input pulse voltage, c, frequency f. An additional input of the input shaper 1 of duration or | 1 pulses receives the output pulse voltage U with a frequency f. At the output of the input shaper 1 the pulse duration is formed during each period Tji a pulse whose duration is equal to l periods T (P is constant). Next, these pulses using for; The pulse 2 amplitude of the pulses is attached to the amplitude of the C and is linearly averaged using a scaling resistor 4 and a filter capacitor 5. The average current of the 3,. arriving at the amplifier 6 entering the input circuit, is determined by the relation T -iLlkJVlk 3, n-Jt 2 2 R - matching the penile of the scaling resistor 4. At the same time, the compensating current 3 flowing into the input circuit of amplifying 6, the resulting recharging of the metering capacitor 9 The overcharging of the metering capacitor 9 is caused by the closing and opening of the battery element 8, the control signal to which is fed from the output of the converter. Under the action of the pulse output voltage, the key element 8 during each period Tl opens and closes, which makes it possible to obtain with the help of the metering capacitor 9 and the inverting amplifier 1O the compensating GOK. The current represents the averaging of the charge of the metering capacitor 9 and determines By the ratio,: tI where C is the capacitance of the dispensing capacitor In the steady state, with a sufficiently large gain of the amplifier, 6 currents / 2 can be considered equal. Then the frequency of the output voltage of the converter is determined by the ratio fa / -fl-f -f /. (3) GTG where K 1 / is a constant value, From the relation (3), it follows that often the output voltage is proportional to the square root of the frequency of the input voltage. From the same state, it follows that to ensure high static accuracy of the conversion, it is necessary to ensure stability of the resistance of the scaling resistor 4 and the capacity of the metering condator 9, since the change in the voltage Ug-ic of the output of the amplitude driver Ki Dulses 2 is compensated by the introduction of the inverting amplifier 1O , and o6ecU to bake the constant value of σ with a high degree of accuracy is quite simple. Claims of the invention: Root-extracting frequency converter; a driver containing successively included input pulse shaper, long-t pulse generator, pulse shaper 1, a scaling resistor, an amplifier, and an output generator, the output of which is connected to the control element of the key element. between the input and output of which is included) the metering capacitor, filter capacitor, one plate of which is connected to the zero potential bus, and the other plate is connected to the input of the key element and the amplifier input, the second input of the pulse amplitude generator is connected to the source of the reference voltage, it differs from ) in order to improve the accuracy of the conversion, an inverting amplifier was inserted into it, the input of which is connected to the output voltage of the reference voltage, and the output connected to the output of the key voltage lementa controlling -t yuschy input of which is connected to an additional, telnomu entry input pulse shaper dlytolnosti. , Sources of information taken into consideration during the examination: 1. M. Ya. Lihtzinder. Exponential Modeling Devices in Information Measuring Systems -, Energie, 1971, p. 45, fig. 3-6. 2. Auth. certificate, USSR № 453702, M.Kl., O-06 Q-7/16, 06.06.73- (prototype).