Method and integrated circuit for tuning an LC resonator and electrical apparatus comprising an LC resonator

摘要

The method involves measuring maximum and minimum frequencies of an LC resonator (2), when a variable capacitor (CT) is set to minimum and maximum values, respectively. The frequency values (F min, F max) are stored in non-volatile memories e.g. EPROMs. A binary tuning code (B) is computed as a linear interpolation between the stored frequency values and a target resonance frequency, to adjust the variable capacitance value. Independent claims are also included for the following: (a) an electrical apparatus comprising an LC resonator and a variable capacitance connected in parallel to the LC resonator (b) an integrated circuit comprising a variable capacitance for tuning an external LC resonator.