| 摘要 |
A voltage controlled oscillator having a pair of active elements operating differentially with respect to DC inputs and differentially as amplifiers with respect to RF feedback currents. Separate feedback paths having +/-45 DEG phase shift are associated with each active element so that the sum of the phase shifts depends on the differential DC inputs to the active elements. A tuned circuit in the common feedback loop changes frequency to compensate for the phase shift, thus providing frequency control in response to the differential DC inputs.
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