Patent ID: 8847151

Claim:
An apparatus for coupling RF and AC signals to provide power to a multipole in a mass spectrometer, the apparatus comprising: a first circuit comprising: an RF power source for providing difference mode power to said multipole via said RF signal; at least one inductor for forming at least one resonant LC circuit with said multipole for providing voltage gain for said RF signal; and a transformer comprising a secondary tap, said transformer connected in parallel to said RF power source and further connected to said at least one inductor such that signals injected into said secondary tap are communicated to said at least one resonant LC circuit; and a second circuit comprising: an AC power source for providing common mode power to said multipole via said AC signal, an output from said second circuit connected to said secondary tap such that said common mode power is injected into said first circuit and said multipole can be operated in common mode and difference mode simultaneously; and at least one inductor for forming a resonant LC circuit with said multipole via said transformer, to provide voltage gain for said AC signal.