SU1663752A1 - Chaiking amplifier stage - Google Patents

Abstract

The invention relates to electronics. The purpose of the invention is to increase the stability of the operating point. The amplifier stage contains N-channel transistors (T) 1 and 2, P-channel T 3 and 4, N - P - N-T 5, 6 and 7. P - N - P-T 8, 9 and 10, sources 11 and 12 voltages, current sources 13, 14, 19, and 20. As composite N-channel and P-channel T 1, 2, 3, and 4, they additionally contain T 15 - 18. The goal is achieved by improving the accuracy by linearizing the amplitude characteristic with T 15 - 18. At the same time, T 1 - 4 is made composite , and all sources 13, 14, 19, and 20 have a common current supply element. 2 hp f-ly, 1 ill.

Description

Bx.1

c'mon

ate

go

The invention relates to electronics and can be used as a universal amplifier stage, namely a voltage follower or a push-pull amplifier stage with one potential and one current input.

The purpose of the invention is to increase the stability of the operating point.

The drawing shows a circuit diagram of an amplifier cascade.

The amplifier cascade contains the first, second n-channel transistors 1, 2, the first, second p-channel transistors 3, 4, the first - the third npn-transistors 5,6,7, the first - the third pnp- transistors 8.9, 10, first 11 and second 12 voltage sources, first 13 and second 14 current sources. As composite n-channel and p-channel transistors additionally contain transistors 15-18. The amplifier stage also contains current sources 19, 20.

Amplification cascade works as follows.

When the amplifier stage is turned on as a voltage follower, the input signal is applied to the first potential input (see Figure 1). The load is connected to the first output (Vykh.1, see drawing). Outputs 2 and 3 (see drawing) are connected to the corresponding power lines, while transistors 6 and 9 operate in a circuit with a common collector. Transmission voltage from Vx. 1 on Outlet 1 (see drawing) without bias is achieved by offsetting the bias voltages connected in series in the source and emitter follower signal circuits. The additional switching on of transistors 15-18 ensures the constancy of the electric modes of transistors 1-4 as the input signal changes. Thereby, an increase in accuracy is achieved due to the linearization of the amplitude characteristic compared to. circuit without transistors 15-18.

Claims (3)

1. Amplification cascade containing The first n-channel p-channel transistors connected in a circuit with a common drain, the gates of which are connected and are the first input of the amplifier stage, the first and second pnp-transistors, the bases of which, as well as the collector of the first npn transistor, are connected to the source of the first n-channel transistor, the first and second pnp transistors, the bases of which connected to the collector of the first pnp transistor, the emitter of which is connected to the emitter of the first npn transistor, while the emitters of the second npnp and pnpn 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 terminals of which are connected to the drains of the first n-channel and p-channel transistors, respectively, characterized in that, in order to increase the stability of the operating point, the second n-can the main and p-channel transistors, the third n-p-p- and pnp transistors, the first and second voltage sources, while the source of the first p-channel transistor is directly connected to the base of the second pnp-transistor, the drain of the second p-channel the transistor and the collector of the third pnp transistor, the emitter of which is connected to the output of the second current source and the gate of the second n-channel transistor, the source of which is connected to the base of the third pn-ptransistor and through the second voltage source to the drain of the first p -channel transistor, the drain of the second p-channel transistor is connected to the base of the second p-n-transistor and the collector of the third p-pr-transistor, the emitter of which is connected to the output of the first current source and the gate of the second p-channel transistor, the source of which is Switched to the base of the third pnp transistor and through the first source voltage to the drain of the first n-channel transistor. 2. The cascade of claim 1, wherein that n-channel and p-channel transistors are made of composite. 3. Cascade according to claims 1 and 2, characterized in that all current sources have a common current supply element.