SU789823A1 - Two a.c. voltage ratio meter - Google Patents

Description

one

The invention relates to electrical measuring equipment and can be used in monitoring various specific parameters of electronic devices determined by the ratio of voltages, conversion factor, amplitude-frequency characteristic, input and output resistances, etc. lu voltages consisting of a switch, amplifier, detector, reading device and dividing device 1.

A disadvantage of the known meter is low speed.

A two-voltage measuring meter is known, which contains an amplifier, two large-scale converters, a first detector connected to the output of the first switch, a memory device, a dividing unit to the output of which a reading device is connected, a second switch whose first input is connected to the first input bus, and the control unit, the first and second outputs of which are connected to the control inputs of the switches. thirty

The disadvantage of this device also lies in the low speed.

The purpose of the invention is to increase speed.

.. This target is achieved by the fact that the meter has a ratio of two alternating voltages containing an amplifier, two large-scale converters, a first detector connected to the output of the first switch (memory device, a pressure unit to the output of which the reading device is connected, the second jump .caster, the first input of which is connected to the first

15 . The input bus, and the control unit, the first and second outputs of which are connected to the control inputs of the switches, the Subtraction device, the key and the second detector are entered, with the second input of the second transfer switch being connected to the second input bus, the output of the second switch the amplifier and the second detector are connected to the first input of the detractor device, the output of which is connected to the input of the division unit and through a serially connected switch, the control input of which is connected to the third output of the block The control, the first scaler and the storage device are connected to the first input, the first switch, the second input of which is connected to the amplifier output, the output of the second detector through the second scale converter is connected to the second input of the subtractor, the control points of the divider and the reading device are connected to the corresponding outputs of the control unit.

The drawing shows a structural diagram of a meter for the ratio of two alternating voltages.

The device contains a switch 1, the inputs of which are connected to the input buses. The output of switch 1 is connected to the input of amplifier 2, the output of which is connected to the input of detector 3 and to one of the inputs of switch 4 The output of detector 3 is connected to the first input of subtractor 5, the output of which is connected to the input of dividing unit 6 and to the input of key 7. The output of the block 6 is connected to the input of the reading device 8, the output of the key 7 is connected through series-connected scale converter 9. And the storage device 10 with another input of switch 4, the output of which is through series-connected detector 11 and asshtabny converter 12 is connected to the second input of the subtractor 5. The control unit 13 is connected with the control inputs of the switches, the key dividing unit and the reading device.

- The two variable voltage ratio meter operates as follows.

In the left clock cycle, with the help of switch 1, the input voltage of the amplifier 2 is applied - divider U. From the output of the amplifier, the voltage goes to the input of the detector 3 and one of the inputs of the switch 4. After a certain time, the switch 4 connects this signal to the input of the detector 11, the output signal of which through the scale converter 12 goes to the subtracter input of the subtractor 5, to the second the input of which enters the signal of the detector 3. The signal from the output of the subtracting device 5 enters the dividing unit 6 and the key 12; during part of the first cycle, the input of the detector 11 through the switch 4 receives a signal from the output amplifier 2, the value is processed in the subtracting device 5 (for example, the transmission ratio of the controlled element can be automatically adjusted or the voltage is converted to code by writing the last to the register Del.) and through the key 7 and the large-scale converter 9, the voltage is supplied to the storage device 10. The first cycle ends with the switching of both switches pa3NndKa with the key.

In the second cycle, to the input of the detector 3, through the switch 1 and the amplifier 2, the amplified voltage signal is divided (Td. To the input

detector 11, a switch from the storage device -10 comes through the switch (it is assumed that the detector converts the frequency spectrum, including zero, since the output signal of the storage device is a constant voltage). After a certain time, the switch 4 disconnects this signal from the input of the detector 11 and connects the output signal of the amplifier 2. The output signals of the detector 3 directly, and the detector 11 passes through the scale converter 12 to the subtractive device 5, from whose output the voltage goes to dividing unit 6 and key 7.

The voltage enters the block b and is stored in the memory device 10, the passage through the key 7 and the large-scale converter 9. The second clock ends with the same commutations as the first one. On the reading device, the value of the ratio of the voltage parameters U and

and.

With continuous measurement, the ratio of the two voltages immediately after the end of the second measurement cycle begins the first cycle of the next cycle. If the measurement is one-time, the input circuit is disconnected and performs the third cycle, similar to the first two, with the exception that the output signal processing of the subtractor unit no division is made. After the end of this extra clock, the measurement of the ratio of the next pair of voltages can begin at any time. The total measurement time of the ratio is two clocks, since already two clocks after the start of the measurement, the measurement result is displayed and the next measurement can begin immediately.

Claims (2)

Invention Formula A two-voltage ratio meter, containing an amplifier, two large-scale converters, a first detector connected to the output of the first switch, a storage device, a dividing unit to the output of which a reading device is connected, a second switch whose first input is connected to the first input bus, and a control unit The first and second outputs are connected to the control inputs of the switches, characterized in that, in order to improve the speed of operation, a subtractive device, a key and a key are entered into it. the second detector, the second input of the second switch to the second input bus, the output of the second switch through the serially connected amplifier and the second detector is connected to the first input of the detractor device, the output of which is connected to the input of the dividing unit and through the serially connected key controlled by The input input of which is connected to the third output of the control unit, the first large-scale converter and the storage device are connected to the first input of the first switch, the second input of which is so me to the output of the amplifier, the output of the second detector is connected to the second input of the subtractor device through the second scale converter, the control inputs of the divider and the reading device are connected to the corresponding outputs of the control unit. Sources of information, taken into account in the examination 1, R. илиilinskas. Ratio meters and their application in radio metering technology. M., Sov. radio, 1975 s. 113-116. 2. USSR author's certificate number 665272, cl. G 01 B 19/10, 1976 5 (prototype).