SU1206714A1 - Apparatus for indication of electrical values - Google Patents

Description

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This invention relates to an electrical measuring technique.

The purpose of the invention is to reduce the current consumption.

The drawing shows a schematic diagram of the device.

The device contains an optoelectronic scale consisting of LED segments 1-4, the anodes of which are combined and connected to the power source 5, which uses a current source, main transistors 6-9, whose collectors are connected to the cathodes of segments 1-4, and bases through resistors 10-13 are connected to input 14 of the device, additional transistors 15-18 and resistors 19-22 of the second group connected between bases and emitters of transistors 15-18, collectors and mitters of transistors 15-17 are connected respectively to bases and emitters of transit tori 7-9 bases of transistors 15-18 are connected to the emitters of transistors 6-9, a transitive Stora emitter 18 is connected to the common bus device.

The device works as follows.

The measured voltage U, fed to input 14, through resistors 10-13 is fed to the base transis

Editor A. Shandor

Compiled by S.Rybin

Tehred M. Parotsay / Proofreader O. Lugov

Order 8706/47 Circulation

VNIIL of the USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d .; 4/5

ylial PPP Patent, g. Uzhgorod, st. Project, 4

067142

tori 6-9. If the voltage U exceeds a value equal to the sum of the voltages of the base-emitter junctions of the transistors 9 and 18, the transistor 9 is disconnected and a current determined by the source 5 appears in the circuit of segment 4. Segment 4 is then ignited.

With a further increase in the voltage and when it reaches a value equal to 10, the sum of the voltages of the base-emitter transitions of the transistors is 8.17 and 18,. transistor 8 opens. Segment 3 is ignited.

In this case, the appearance of current in the base circuit of transistor 17 leads to its opening. The transistor 17 shunts the base-emitter junction of the transistor 9, which causes the transistor 9 to close and the current in the circuit 20 of the segment 4 to disappear. The latter ceases to shine. With a subsequent increase in input voltage, the next transistor opens, which leads to ignition of the next segment and turning off 2.5 previous ones. On the optoelectronic scale, the light of the other segment moves, depending on the magnitude of the measured voltage.

The current source 5 determines the constant brightness of the segments, irrespective of the fact that the voltages on the collectors of transistors 6–9 are different.

Claims (1)

DEVICE FOR INDICATING ELECTRICAL VALUES, containing an electronic cabinet consisting of n LED segments, η transistors, the base of each of which is connected to the first output of the corresponding resistor of the first group, the resistor of the second group, and a power source, the second output of the first resonator of the first group connected to the input of the device, characterized in that, in order to reduce the current consumption, P-1 additional transistors are introduced into it, and the collectors of the main transistors are connected to the power source through flashing LED segments of the electronic scale, collectors and emitters of <-x additional transistors, the bases of which are connected to emitters (il) -x of the main transistors, resistors of the second group are connected (S between bases and emitters of additional transistors, the second terminals of the remaining resistors of the first group are connected to the input of the device. SU 1206714 о