Patent ID: 9660578
Date: 2017-05-23
CPC Classifications: H01G,H03B,H03L

Claim:
1. An electronic device comprising: a controllable capacitor bank having a bank capacitance comprising a first number of parallel electrically coupled switchable capacitors for controlling a frequency characteristic of the electronic device; a capacitive divider having a divider capacitance arranged in parallel with the controllable capacitor bank and configured to linearize the controllable capacitor bank in a linearization frequency range of the frequency characteristic, the capacitive divider comprising a control circuit having a plurality of control outputs coupled to a corresponding plurality of control inputs of the capacitive divider and the controllable capacitor bank, the control circuit configured to modify the bank capacitance and the divider capacitance by activating one or more switchable capacitors of the controllable capacitor bank and the main capacitors bank for providing capacitance steps, each capacitance step being variable over frequency such that for each capacitance step a frequency change Δf of the frequency characteristic is maintained constant in the linearization frequency range.