Title:
DIFFERENTIAL SWITCHABLE CAPACITORS FOR RADIOFREQUENCY POWER AMPLIFIERS
Document Type and Number:
WIPO Patent Application WO/2020/215621
Kind Code:
A1
Abstract:
A method for tuning a resonant circuit using differential switchable capacitors is provided. For example, the method can operate in context of a power amplifier with a tunable resonant output network. To tune the network, multiple differential switchable capacitors are provided in parallel. Each differential switchable capacitor can include a pair of capacitors, each coupled between a respective internal node and a respective differential terminal; and the internal nodes are selectively coupled or decoupled using a respective electronic switch. Switching on one of the differential switchable capacitors forms a capacitive channel having an associated capacitance. Each differential switchable capacitor can also include a switch network to selectively pull the internal nodes to a high or low voltage reference according to the selected operating mode.
Inventors:
EMIRA AHMED (US)
FARES MOUNIR (US)
FARES MOUNIR (US)
Application Number:
PCT/CN2019/111145
Publication Date:
October 29, 2020
Filing Date:
October 15, 2019
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
H03K17/06
Foreign References:
| US20180269862A1 | 2018-09-20 | |||
| CN103001618A | 2013-03-27 | |||
| CN106664097A | 2017-05-10 | |||
| US9755594B1 | 2017-09-05 | |||
| US20160373058A1 | 2016-12-22 | |||
| US20050174184A1 | 2005-08-11 | |||
| US20030171109A1 | 2003-09-11 |
Other References:
See also references of EP 3759818A4
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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