Tunable capacitance control circuit and tunable capacitance control method
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsJae Hyouck Choi, Sung Hwan Park, Jeong Hoon Kim, Chan Yong Jeong, Sang Wook Park
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Abstract
Disclosed herein are a tunable capacitance control circuit and a tunable capacitance control method. The tunable capacitance control method is a tunable capacitance control method by a tunable capacitance control circuit including an MIM capacitor, a plurality of FET switches, and a control unit, wherein the control unit outputs control signals allowing only one of the plurality of (n) FET switches to be switched on and the remaining (n−1) FET switches to be switched off to the plurality of FET switches, thereby obtaining a desired tunable capacitance value.
Claims5
A tunable capacitance control circuit comprising:
- a metal-insulator-metal (MIM) capacitor;
- a plurality of field effect transistor (FET) switches connected in series with the MIM capacitor;
- and
- a control unit applying switch on or off control signals to each of the gate terminals of the plurality of FET switches,
- wherein the control unit outputs the control signals allowing only one of the plurality of (n) FET switches to be switched on and the remaining (n−1) FET switches to be switched off, thereby obtaining a desired tunable capacitance value, and
- wherein in obtaining the desired tunable capacitance value (Cmim), the control unit adjusts and obtains a “Cmim2” value and a Coff value according to the switch off the FET by the following Equation,
- C
- MIM
-
- (
- Ctotal
- )
- =
- Coff
- n
- -
- 1
- *
- C
- MIM
-
-
- 2
- Coff
- n
- -
- 1
- +
- C
- MIM
-
-
- 2
- .
A tunable capacitance control method by a tunable capacitance control circuit including an MIM capacitor, a plurality of FET switches, and a control unit,
- wherein the control unit outputs control signals allowing only one of the plurality of (n) FET switches to be switched on and the remaining (n−1) FET switches to be switched off to the plurality of FET switches, thereby obtaining a desired tunable capacitance value, and
- wherein in obtaining the desired tunable capacitance value (Cmim), the control unit adjusts and obtains a “Cmim2” value and a Coff value according to the switch off the FET by the following Equation
- C
- MIM
-
- (
- Ctotal
- )
- =
- Coff
- n
- -
- 1
- *
- C
- MIM
-
-
- 2
- Coff
- n
- -
- 1
- +
- C
- MIM
-
-
- 2
Dependencies are inferred from the claim text.