Oscillator for digital ATV signals

摘要

The oscillator includes a tunable circuit (L2A,L2B) which is connected to the emitter of a transistor in the oscillator circuit. An additional feedback coupling is provided from the tunable circuit to the transistor base. The tunable circuit can include a first inductive component coupled on the AC side to a second inductive element with a negative coupling coefficient between the components. The resultant feedback voltage can be applied through the base-earth circuit of the transistor.