ELECTRONIC DEVICE WITH CAPACITOR BANK LINEARIZATION AND A LINEARIZATION METHOD
First 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 comprisinga series arrangement of a first series capacitance, and a main capacitor bank comprising a second number of parallel electrically coupled switchable capacitors; and
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 Δ
f of the frequency characteristic is maintained constant in the linearization frequency range.
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Abstract
An electronic device comprises a controllable capacitor bank and a capacitive divider arranged in parallel with the capacitor bank and configured to linearize the capacitor bank in a linearization frequency range of a frequency characteristic of the electronic device. The capacitive divider comprises a series arrangement of a first series capacitance, and a main capacitor bank. A control circuit coupled to one or more control inputs of the capacitive divider and controllable capacitor bank is configured to modify the equivalent capacitance of the capacitive divider and the controllable capacitor bank for providing capacitance steps, each capacitance step being variable over frequency such that for each step a frequency change Δf of the frequency characteristic is maintained constant in the linearization frequency range.
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Citations
20 Claims
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1. An electronic device comprising:
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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 series arrangement of a first series capacitance, and a main capacitor bank comprising a second number of parallel electrically coupled switchable capacitors; and 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 Δ
f of the frequency characteristic is maintained constant in the linearization frequency range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of linearizing a controllable capacitor bank of an electronic device in a linearization frequency range of a frequency characteristic of the electronic device, wherein the controllable capacitor bank has a bank capacitance and comprises a first number of parallel electrically coupled switchable capacitors for controlling the frequency characteristic of the electronic device, the method comprising:
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arranging a capacitive divider in parallel with the controllable capacitor bank, wherein the capacitive divider comprises a series arrangement of a first series capacitance, and a main capacitor bank comprising a second number of parallel electrically coupled capacitors, modifying the bank capacitance and the divider capacitance by activating one or more 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 Δ
f of the frequency characteristic is maintained constant in the linearization frequency range. - View Dependent Claims (18, 19, 20)
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Specification