Patent ID: 7508280

Claim:
An oscillator frequency adjustment apparatus comprising; a first output and a second output, one or more transformers where each transformer comprises at least two coils, an oscillator circuit comprising; at least one coil from the transformer, at least one capacitor, at least one regenerative circuit, and a means of coupling the coils, capacitors and regenerative circuits to form the oscillator circuit, the oscillator circuit is coupled to the first and second output, at least one adjustable tank circuit comprising; the second coil of the transformer, and at least one adjustable capacitor, the oscillator circuit is fabricated on a first substrate, the adjustable tank circuit is fabricated on a second substrate, the second coil of the adjustable tank circuit is placed over the coil of the oscillator circuit, wherein the first and second substrates form part of a MCM, at least one coil from the oscillator circuit has a flux linkage with the second coil from the adjustable tank circuit, and adjusting the one adjustable capacitor changes the frequency of operation of the apparatus.