Invention Grant
- Patent Title: Switchable capacitive elements for programmable capacitor arrays
- Patent Title (中): 可编程电容阵列的可切换电容元件
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Application No.: US13922337Application Date: 2013-06-20
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Publication No.: US09209784B2Publication Date: 2015-12-08
- Inventor: Christian Rye Iversen , Marcus Granger-Jones
- Applicant: RF Micro Devices, Inc.
- Applicant Address: US NC Greensboro
- Assignee: RF Micro Devices, Inc.
- Current Assignee: RF Micro Devices, Inc.
- Current Assignee Address: US NC Greensboro
- Agency: Withrow & Terranova, P.L.L.C.
- Main IPC: H03L5/00
- IPC: H03L5/00 ; H01P1/22 ; H03H21/00 ; H03K17/10

Abstract:
Switchable capacitive elements are disclosed, along with programmable capacitor arrays (PCAs). One embodiment of the switchable capacitive element includes a field effect transistor (FET) device stack, a first capacitor, and a second capacitor. The FET device stack is operable in an open state and in a closed state and has a plurality of FET devices coupled in series to form the FET device stack. The first capacitor and the second capacitor are both coupled in series with the FET device stack. However, the first capacitor is coupled to a first end of the FET device stack while the second capacitor is coupled to a second end opposite the first end of the FET device stack. In this manner, the switchable capacitive element can be operated without a negative charge pump, with decreased bias swings, and with a better power performance.
Public/Granted literature
- US20130278317A1 SWITCHABLE CAPACITIVE ELEMENTS FOR PROGRAMMABLE CAPACITOR ARRAYS Public/Granted day:2013-10-24
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