| 摘要 |
A frequency stabilizing device for a FET high-frequency oscillator comprises means for coupling an automatic biasing circuit included in the source-ground connection of the oscillator to a drain voltage supply circuit included in the drain-ground connection of the oscillator to provide simultaneous and oppositely directed variations of the resistance of the automatic biasing circuit and of the value of the drain-ground voltage supplied by the drain voltage supply circuit. A variation of this device can serve as a modulation stage wherein the coupling means comprise a modulating circuit arranged to supply two branches in parallel, each branch comprising a series arrangement of a shaping circuit and an impedance-matching circuit and one of which constitutes the automatic biasing circuit and the other one the drain voltage supply circuit. |
