Title:
LOW NOISE AMPLIFIER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2022/142637
Kind Code:
A1
Abstract:
A low noise amplifier circuit, comprising a radio frequency amplifier circuit (10), having one end connected to a signal input end (Vin), and the other end connected to an output impedance matching circuit (20); the output impedance matching circuit (20), having one end connected to the radio frequency amplifier circuit (10), and the other end connected to an attenuation network (30); the attenuation network (30), having one end connected to the output impedance matching circuit (20), and the other end connected to a signal output end (Vout); a passive attenuation path (40), having one end connected to the signal input end (Vin), and the other end connected to a connection node (A) between the output impedance matching circuit (20) and the attenuation network (30); and an impedance adjustment network (50), configured to generate, in a first operation mode, a resonance with a parasitic capacitance generated by the attenuation network (30), and generate, in a second operation mode, a resonance with a parasitic capacitance generated by the attenuation network (30) and the passive attenuation path (40). By using the impedance adjustment network, resonance can be generated for the parasitic capacitance formed by the attenuation network or the parasitic capacitance formed by the attenuation network and the passive attenuation path, so as to perform impedance matching.
Inventors:
DING TUANJIE (CN)
SONG NAN (CN)
NI JIANXING (CN)
SONG NAN (CN)
NI JIANXING (CN)
Application Number:
PCT/CN2021/126283
Publication Date:
July 07, 2022
Filing Date:
October 26, 2021
Export Citation:
Assignee:
RADROCK SHENZHEN TECH CO LTD (CN)
International Classes:
H03F1/56; H03F1/26
Foreign References:
| CN112671357A | 2021-04-16 | |||
| CN106656071A | 2017-05-10 | |||
| CN108736835A | 2018-11-02 | |||
| US20040251960A1 | 2004-12-16 | |||
| CN102823129A | 2012-12-12 | |||
| CN1534867A | 2004-10-06 |
Attorney, Agent or Firm:
SHENZHEN ZHONGDINGHUICHENG INTELLCCTUAL PROPERTY AGENCY (CN)
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