| 摘要 |
A push-pull balanced current amplifier in which input signal in the form of voltage enters to input bus 7. If input bus voltage increases, fifth transistor 9 a little opens, a sixth 10 –a little closes. Current through fifth transistor 9 increases, current through sixth 10 transistor decreases. Gate potential of eighteenth transistor 23 increases, gate potential of seventeenth transistor 20 decreases. As a result, 23 transistor a little opens, seventeenth transistor 20 a little closes. Potential of connection point of sources of fifteenth 21 and sixteenth 22 transistors decreases, directs to potential of negative bus 28. Potential of output bus 27 traces potential of connection point of fifteenth 21 and sixteenth 22 transistors, decreases and approaches to negative bus potential. A first 1 and second 6 direct current sources, as well as first 3, second 4, third 2, fourth 5, seventh 12, eighth 13 transistors form a circuit of operating points assignment. Thirteenth 16, fourteenth 17, fifteenth 21, sixteenth 22 transistors form a bidirectional current reflector which together with compensators which are built on the basis of ninth 11 and eleventh 15, tenth 14 and twelfth 18 transistors correspondingly, assign operating points of amplification stages built on seventeenth 20 and eighteenth 23 transistors correspondingly. Fifteenth 21, sixteenth 22, nineteenth 24, twentieth 25 transistors form a push-pull output stage. |
