| 摘要 |
FIELD: radio engineering; radio receivers meant to meet rigorous requirements to linearity. ^ SUBSTANCE: novelty is that newly introduced in proposed amplifier that has transistor 1 with shift resistors 3, 4, isolating capacitor 5, and power supply 2 is diode 8 inserted in circuit between emitting electrode of transistor 1 connected in voltage follower circuit arrangement and ground; diode 8 has variable resistor 9 and resistor 6 whose movable contact is connected to this diode through capacitor 10. Working point is chosen on characteristic of diode 8 (direct-current mode) by means of variable resistor 6 and desired slope of circuit resistance characteristic between emitting electrode of transistor 1 and ground is set by displacing movable contact of resistor 6. Such design ensures that current increment in transistor 1 due to nonlinear distortions will not cause voltage increment across output. ^ EFFECT: enhanced linearity of amplifier. ^ 1 cl, 2 dwg |
