SU1693717A1

SU1693717A1 - Amplifying stage

Info

Publication number: SU1693717A1
Application number: SU884379694A
Authority: SU
Inventors: Александр Анатольевич Чайкин
Original assignee: Предприятие П/Я М-5876
Priority date: 1988-01-04
Filing date: 1988-01-04
Publication date: 1991-11-23

Abstract

Изобретение относитс к радиоэлектронике . Цель изобретени - повышение линейности амплитудной характеристики 2 Усилительный каскад содержит п-каналь- ные транзисторы (1)1.2, р-канальные Т 3, 4, n-p-п Т 5- 8, p-n-р Т 9-12, источники 13, 14, 19, 20 тока и отражатели 15-18 тока Обеспечение высокой линейности амплитудной характеристики достигаетс за счет того, Ч7о Т 1 и 2 (3 и 4) при изменении входного напр жени наход тс всегда в одинаковых режимах благодар наличию цепей обратной св зи по напр жению на Т 7 и 11. Источники 13, 14, 19 и 20 юка могут иметь общий токозадающий элемент 1 з п ф-лы, 1 илThe invention relates to electronics. The purpose of the invention is to increase the linearity of the amplitude characteristic 2 The amplifier cascade contains n-channel transistors (1) 1.2, p-channel T 3, 4, np-p T 5-8, pn-p T 9-12, sources 13, 14 , 19, 20 current and current reflectors 15-18 Ensuring high linearity of the amplitude characteristic is achieved due to the fact that Ch7o T 1 and 2 (3 and 4) are always in the same modes when the input voltage is changed due to the presence of feedback circuits by voltage on T 7 and 11. Sources 13, 14, 19 and 20 of the Yuk may have a common current supply element 1 sf files, 1 slug

Description

Изобретение относится к радиоэлектронике и может использоваться а качестве прецизионного усилительного каскада, а именно быстродействующего повторителя напряжения или двухтактного усилительного каскада с одним потенциальным и одним токовым входами.The invention relates to electronics and can be used as a precision amplifier stage, namely a high-speed voltage follower or push-pull amplifier stage with one potential and one current input.

Цель изобретения - повышение линейности амплитудной характеристики.The purpose of the invention is to increase the linearity of the amplitude characteristic.

На чертеже представлена принципиальная электрическая схема усилительного каскада.The drawing shows a circuit diagram of an amplifier stage.

Усилительный каскад содержит первый и второй п-канальные транзисторы 1 и 2. первый и второй р-канальные транзисторы 3 и 4, первый - четвертый п-р-л-транэисторы 5-8, первый - четвертый р-п-р-транзисторы 9-12, первый и второй источники 13 и 14 тока первый - четвертый отражатели 15—18 тока, а также источники 19 и 20 тока.The amplifier stage contains the first and second p-channel transistors 1 and 2. the first and second p-channel transistors 3 and 4, the first is the fourth p-p-transistors 5-8, the first is the fourth p-p-transistors 9 -12, the first and second current sources 13 and 14, the first and fourth current reflectors 15-18, as well as current sources 19 and 20.

Усилительный каскад работает следующим образом.The amplifier stage works as follows.

На первый потенциальный вход (Вх.1) подается входное напряжение. В каждом из плеч каскада напряжение смещения истокового повторителя (транзисторы 1 и 3) компенсируется равным по величине и обратным по знаку напряжением смещения база-эмиттерного -перехода транзисторов 6и 10. Таким образом, с первого входа (Bx.lj на первый выход (Вых.1) напряжение передается без смещения. Поскольку транзисторы 1 и 2 (3 и 4) при изменении входного напряжения находятся всегда в одингкозы:·; режимах (благодаря наличию цепей обратной связи яс напряжению не транзистора;·; 7 и 11), каскад обеспечивает высокую линейность амплитудой характеристики.An input voltage is applied to the first potential input (Bx.1). In each of the shoulders of the cascade, the bias voltage of the source follower (transistors 1 and 3) is compensated by the bias-emitter-junction bias of the transistors 6 and 10, which is equal in magnitude and opposite in sign. Thus, from the first input (Bx.lj to the first output (Output. 1) the voltage is transmitted without bias. Since transistors 1 and 2 (3 and 4) are always in one-state state when the input voltage changes: ·; modes (due to the presence of feedback circuits it is not the voltage of the transistor; ·; 7 and 11), the cascade provides a high linearity in amplitude character Istics.

При использовании второго (токового) входа (Вх.2) в прецизионном усилительном каскаде выходные токи снимаются с второго и третьего выходов каскада (Вых,2 л Вых.З). При подключении к этим выходам источников 19, 20 тока, подключенных вторыми выводами к соответствующим шинам питания, статические токи в плечах каскада замыкаются внутри него, в этом случае со второго и третьего выходов каскада считываются только сигнальные токи.When using the second (current) input (Vkh.2) in a precision amplifier stage, the output currents are removed from the second and third outputs of the cascade (Out, 2 l Out.Z). When current sources 19, 20 are connected to these outputs and connected by the second terminals to the corresponding power buses, the static currents in the arms of the cascade are closed inside it, in this case only signal currents are read from the second and third outputs of the cascade.

Claims

1. An amplifier stage containing the first η-channel and p-channel transistors connected according to a common drain circuit, the gates of which are connected and are the first input of the amplifier stage, the first and second p-p-p-transistor, the bases of which, and also the collector of the first pnp transistor is connected to the source of the first p-channel transistor, the first and second pnp transistors. the bases of which are connected to the collector of the first pnp transistor, the emitter of which is connected to the emitter of the first pnp transistor. the emitters of the second p-p-p and p-o-p transistors are connected and are the second input of the amplifier stage, their collectors are the corresponding outputs of the amplifier stage, as well as the first and second current sources, the power leads of which are connected to the drains of the first, respectively p-channel and p-channel transistors, with the fact that, in order to increase the linearity of the amplitude characteristic, the second p-channel and p-channel transistors, the third and fourth p-p- p-transistors, third and fourth r-p-p-transistor s, the first, second, third and fourth current reflectors, while the source of the first p-channel transistor is directly connected to the base of the second p-p-p-transistor and the outputs of the first and second current reflectors, the power outputs of which are connected respectively to the drains of the first η- channel and p-channel transistors, and the inputs to the collectors of the third p-p-p and p-p-p-p transistor, respectively, the emitter of the third n-p-p transistor connected to the source of the second p-channel transistor and the base Fourth rpp transistor, emitter cat It is connected to the output of the first p-channel transistor and the gate of the second p-channel transistor, the drain of which is connected to the drain of the first p-channel transistor, the outputs of the third and fourth current reflectors are connected to the base of the second p-p-p transistor, the power leads of the third and fourth current reflectors are connected to the drains of the first p-channel and p-channel transistors, respectively, and the inputs are to the collectors, respectively, of four p-p-p-p and third p-p transistors, the emitter of the third p-p p-transistor connected to the source of the second η-channel transistor and the base of the fourth pnp transistor, the emitter of which is connected to the output of the second current source and the gate of the second p-channel transistor, the drain of which is connected to the drain of the first p-channel transistor, while the base of the third p-p -p- and p-p-p-transistors are connected and connected to the emitters of the second p-p-p and p-p-p-transistors.

2. The amplifier stage according to claim 1, with the fact that the current sources have a common current-carrying element.