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US 2018/0351536 A1Published application
Grounded capacitance multipliers with electronic tuning possibility using single current feedback amplifier
AssigneeYeditepe Universitesi
InventorALI UMIT KESKIN
Life of this patent
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Abstract
The present invention relates to a capacitance multiplier topology suitable for both positive and negative capacitance multiplication having a minimum configuration consisting of a current feedback amplifier (CFOA), two resistors and a reference capacitor, with each C-multiplier having a respective capacitance amplification constant k which is externally adjustable. Such a capacitance multiplier has less parasitic components, occupies a smaller chip area with higher simulated capacitance value.
Claims10
A capacitance multiplier circuit, comprising:
- a current feedback operational amplifier having an x-terminal, a y-terminal, a z-terminal and a w-terminal, wherein a plus type current conveyor within the current feedback operational amplifier is provided;
- a capacitor having a first end of the capacitor connected to the x-terminal of the current feedback operational amplifier and a second end of the capacitor connected to an input node;
- a first resistor having a first end of the first resistor connected to the z-terminal of the current feedback operational amplifier and a second end of the first resistor connected to the second end of the capacitor;
- and
- a second resistor having a first end of the second resistor connected to the w-terminal of the current feedback operational amplifier and a second end of the second resistor connected to the second end of the first resistor.
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A capacitance multiplier circuit, comprising:
- a current feedback operational amplifier having an x-terminal, a y-terminal, a z-terminal and a w-terminal, wherein a negative type current conveyor within the current feedback operational amplifier is provided;
- a capacitor having a first end of the capacitor connected to the x-terminal of the current feedback operational amplifier and a second end of the capacitor connected to an input node;
- a first resistor having a first end of the first resistor connected to the z-terminal of the current feedback operational amplifier and a second end of the first resistor connected to the second end of the capacitor;
- and
- a second resistor having a first end of the second resistor connected to the w-terminal of the current feedback operational amplifier and a second end of the second resistor connected to the second end of the first resistor.
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Dependencies are inferred from the claim text.