| 摘要 |
Offered amplifier can be used for low-frequency signals intensity in a wide frequency zone. It contains plus and minus reflexive cord loops, signals of which are summarized interconnecting.Essence of invention: plus reflexive cord loops creating 2 transistors are used which make differential couple. Each of the mentioned transistors might be bio-polar, field-effect transistor or composite transistor, emitter of which or out-flowing outlets are voltaic-connected in addition one of mentioned transistors outlet circuit with loop circuit agency is connected with other mentioned transistor base, i.e., seal. In addition the emitter circuit of the mentioned transistors couple is supplied with a current source with characteristic approximately linear current dependence on temperature. Accordingly small non-linear mutilations are ensured when the amplifier's working temperature changes.Use of symmetrical plus reflexive cord loops couple and additional adder, which summarizes minus reflexive loop signal with plus reflexive loop signal, decreases supplying circuits obstructive influence and additionally decreases the signal of the non-linear and phases mutilations.In Fig. 1 principal scheme of offered amplifier is showed, where plus cord loop and adder, which summarizes inlet signal with mentioned loop signal, are located in inlet.<IMAGE>
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