SU1298852A1

SU1298852A1 - Differential amplicier

Info

Publication number: SU1298852A1
Application number: SU853904491A
Authority: SU
Inventors: Владимир Семенович Малов
Original assignee: Предприятие П/Я В-2969
Priority date: 1985-05-30
Filing date: 1985-05-30
Publication date: 1987-03-23

Abstract

Изобретение может быть использовано в качестве управл емого источника тока с дифференциальными входами . Цель изобретени - упрощение усилител (У)« У содержит резисторы 1-7, источники 8-11 входного напр жени , операционные У 12, 13, токоза- дающий резистор (ТР) 14, нагрузку 15. Точка соединени ТР 14 и нагрузки 15 св зана с неинвертирующими входами операционных У 12 и 13. Регулирование крутизны преобразовани достигаетс регулировкой ТР 14. Технико- экономические преимущества У определ етс достигнутым упрощением при большом выходном сопротивлении в широком диапазоне регулировани крутизны преобразовани напр жени в ток. 1 ил. rHZDThe invention can be used as a controlled current source with differential inputs. The purpose of the invention is to simplify the amplifier (Y) "Y" contains resistors 1-7, sources 8-11 of the input voltage, operating voltage 12, 13, current-carrying resistor (TP) 14, load 15. Connection point TP 14 and load 15 It is equipped with non-inverting inputs of operating rooms 12 and 13. Adjusting the conversion steepness is achieved by adjusting TP 14. Technical and economic benefits U is determined by the simplification achieved with a large output impedance in a wide range of voltage-to-current adjustment. 1 il. rHZD

Description

Изобретение относитс к электронным схемам общего назначени , а именно к дифференциальным усилител м посто нного тока, и может быть использовано , например, в радиотехнике в качестве управл емого источника тока с дифференциальными входами.The invention relates to general-purpose electronic circuits, namely, differential DC amplifiers, and can be used, for example, in radio engineering as a controlled current source with differential inputs.

Цель изобретени - упрощение.The purpose of the invention is simplification.

На чертеже представлена принциобразовани напр жени в ток. Выходной ток усилител The drawing shows voltage generation in current. Output current amplifier

не зависит от сопротивлени нагрузки и с высокой точностью равен току через токоза- дающий резистор, который,в свою очередь, пр мо пропорционален дифференциальной сумме выходных напр жений и обратно пропорционален вел чине токозадающего резистора. Регуdoes not depend on the resistance of the load and with high accuracy is equal to the current through the current-supply resistor, which, in turn, is directly proportional to the differential sum of the output voltages and inversely proportional to the lead-state current resistor. Regu

1515

пиальна схема дифференциального уси- О лирование крутизны преобразовани лител ,A pial scheme of differential amplification of the conversion steepness of the transducer,

Дифференциальный усилитель содержит первый, второй, третий, четвертый , п тый, шестой и седьмой резисторы 1-7 соответственно, первый, второй, третий и четвертый источники 8-11 входного напр жени соответственно , первый 12 и второй 13 операционные усилители (ОЦ), токозадакиций резистор 14 и нагрузку 15.The differential amplifier contains the first, second, third, fourth, fifth, sixth and seventh resistors 1-7, respectively, the first, second, third and fourth sources 8-11 of the input voltage, respectively, the first 12 and second 13 operational amplifiers (OC), current sampling resistor 14 and load 15.

Дифференциальный усилитель работает следующим образом.Differential amplifier works as follows.

Можно показать, что приIt can be shown that when

2020

напр жени в ток на значении выход ного сопротивлени практически не отражаетс .The voltage to current is practically not reflected at the output resistance value.

II

Claims

Invention Formula

Differential amplifier, computation, the first operational amplifier whose inverting input is connected to the first input voltage source through the first resistor, and the second resistor to the second input voltage source, through the third j

R,

R.

J R.

(-L -.- j-). R, to /

RS

h 6

where R, is the resistance of the corresponding resistor (1-7), the output current is almost independent of the load resistance 15. This is due to the fact that the positive feedback voltage is applied to the input of both the first 12 and the second 13 OU, The adjustment of the conversion slope is easily achieved by adjusting the current-setting resistor 14.

The technical and economic advantage of a differential amplifier is determined by simplification with a large output impedance in a wide range of steepness control. Predecessor V.Ietrash Order 895/56

Compiled by Y. Rogatkin

Tehred N.Glushchenko Proofreader S.Shekmar

Circulation 902 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, U.I. Projectml, 4

f 2988522

voltage to current. Output current amplifier

does not depend on the load resistance and with high accuracy is equal to the current through the current-supplying resistor, which, in turn, is directly proportional to the differential sum of the output voltages and inversely proportional to the value of the current-carrying resistor. Regu

conversion steepness casting

the voltage to current is practically not reflected at the output resistance value.

I

Invention Formula

The differential amplifier, the contents of the first operational amplifier, the inverting input of which through the first resistor is connected to the first source of input voltage, through the second resistor to the second source of input voltage, through the third resistor to its own output, the second operational amplifier that inverts the input of which through the fourth resistor is connected to the output of the first operational amplifier, through

the fifth resistor to the third input voltage source, through the sixth resistor to the fourth input voltage source, and the output through the seventh resistor to its inverting input and via series-connected current resistor and load to the common bus, characterized in that In order to simplify, the connection point of the current-carrying resistor and the load is connected to the non-inverting inputs of the first and second operational amplifiers.