Title:
CAPACITOR SWITCHING CHIP AND RADIO-FREQUENCY POWER AMPLIFICATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/227274
Kind Code:
A1
Abstract:
Disclosed are a capacitor switching chip and a radio-frequency power amplification circuit. A capacitor switching chip (1) comprises: an interface module, a first switch module (10), an internal capacitor (C1), and a second switch module (20). When a switch control signal including a power supply mode is received, the interface module performs signal conversion on the switch control signal to obtain a switching signal. The first switch module (10) makes, according to a first signal, a second internal port of the internal capacitor (C1) and an output end (B) of the interface module be in a disconnected state, or makes the second internal port of the internal capacitor (C1) and the output end (B) of the interface module connect by means of the first switch module (10). The second switch module (20) makes, according to a second signal, a second external port of an external capacitor (C2) and the output end (B) of the interface module be in a disconnected state, or makes the second external port of the external capacitor (C2) and the output end (B) of the interface module connect by means of the second switch module (20). The chip realizes the automatic switching of a capacitor for different power supply modes, thereby increasing the flexibility of a circuit design, and reducing design and wiring costs.
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| JP2003289228 | POWER AMPLIFYING DEVICE |
Inventors:
FENG JINGHAO (CN)
NI JIANXING (CN)
NI JIANXING (CN)
Application Number:
PCT/CN2020/108560
Publication Date:
November 18, 2021
Filing Date:
August 12, 2020
Export Citation:
Assignee:
RADROCK SHENZHEN TECH CO LTD (CN)
International Classes:
H03F3/20
Foreign References:
| CN103378870A | 2013-10-30 | |||
| US20080164926A1 | 2008-07-10 | |||
| CN109391235A | 2019-02-26 |
Attorney, Agent or Firm:
SHENZHEN ZHONGDINGHUICHENG INTELLCCTUAL PROPERTY AGENCY (CN)
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