CS277384B6 - Emitter follower engagement with a voltage gain greater than one - Google Patents

Abstract

The emitter follower circuit with a voltage gain greater than one is designed for electronic amplifiers. The essence of the circuit is that the input terminal (J) of the feedback circuit (SO) is connected to the output terminal (2) of the emitter follower, and the output terminal (K) of the feedback circuit (SO) is connected to the gate of the load transistor (T2), and the ground terminal (Z) of the feedback circuit (SO) is connected to the common ground terminal (O). The emitter follower circuit with a voltage gain greater than one can be used in the electrical industry, especially in the production of electronic components and devices.

Description

1 CS 277384 B6

Connecting the emitter follower with a voltage boost greater than one

Technical field

The present invention relates to the engagement of an emitter follower with a thickened reinforcement greater than one.

The better state of the art

Up to now, emitter tracker wiring utilizing a transistor as an active component consists of an input transistor and a load resistor or current source connected between the emitter of the input transistor and the ground. The disadvantage of this connection is that its voltage amplification is always less than one. The voltage amplifier of the emitter follower depends on a number of factors, e.g., the voltage amplification factor of the transistor, the type of load and the like, the greater the voltage amplifier of the input transistor, the more the voltage amplifier of the emitter follower approaches one. By using the current source as a load, this amplification approaches one of the following: If an emitter follower is formed from discrete bipolar transistors, or on an integrated circuit chip implemented by bipolar technology, voltage gains can be achieved close to one. The unfavorable situation is in the case of electric field-controlled transistors due to their small voltage amplification factor. For this reason, the commonly obtainable voltage gain of emitter trackers using electric field driven transistors is approximately in the range of A = 0.7 to 0.95.

SUMMARY OF THE INVENTION

The above drawbacks are substantially obviated by the inclusion of a voltage amplifier emitter follower consisting of an input transistor, a load transistor, and a backbone circuit, the principle of which is that the input terminal of the backbone circuit is coupled to the output terminal of the emitter follower. the reverse circuit terminal is coupled to the gate of the retracting transistor and the ground terminal of the reverse circuit is coupled to a common ground terminal.

The invention of the emitter follower engagement with a voltage amplification greater than one allows the input of electronic amplifiers with qualitatively new characteristics to be achieved. In addition to the known emitter trackers, the large input impedance, they can achieve a gain greater than one in them.

1 is a schematic representation of a emitter follower with a voltage amplification greater than one; FIG. 2 illustrates a specific example of the connection; and FIG. of the emitter follower voltage boost of FIG. 2 in FIG.

Claims (1)

PATENT CLAIMS Connection of an emitter tracker with a voltage gain greater than one, consisting of an input transistor, a pull-up transistor and a feedback circuit, the output terminal of which is connected to the gate of the pull-up transistor and whose ground terminal is connected to a common ground terminal, characterized in that the input terminal ) of the feedback circuit (SO) is connected to the output terminal (2) of the emitter tracker and the feedback circuit (SO) together with the pull-up transistor (T2) forms the active load of the input transistor (TI).