Title:
DIGITAL-TO-ANALOG CONVERTER, DIGITAL POWER AMPLIFICATION SUBSYSTEM, AND DIGITAL POWER AMPLIFICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/156161
Kind Code:
A1
Abstract:
A digital-to-analog converter, a digital power amplification subsystem, and a digital power amplification system, the digital converter comprising: a first constituent branch and a second constituent branch. The first constituent branch comprises: a first switch (S1) and a first current source (IDAC1) connected in series. The first current source (IDAC1) comprises: a fourth resistor (RS1), a first field effect transistor (m1), a second field effect transistor (M2), and a second operational amplifier (AMP2). The second constituent branch comprises: a second switch (S2) and a second current source (IDAC2) connected in series. The second current source (IDAC2) comprises: a fifth resistor (RS2), a third field effect transistor (M3), a fourth field effect transistor (M4), and a third operational amplifier (AMP3). Thus, when applied in the digital power amplification system, the equivalent output impedance of the digital-to-analog converter is greatly increased, reducing the power supply rejection ratio of the digital power amplification system.
Inventors:
YANG ZHIFEI (CN)
ZHANG HAIJUN (CN)
YAO WEI (CN)
DU LIMING (CN)
CHENG JIANTAO (CN)
ZHANG HAIJUN (CN)
YAO WEI (CN)
DU LIMING (CN)
CHENG JIANTAO (CN)
Application Number:
PCT/CN2020/072166
Publication Date:
August 06, 2020
Filing Date:
January 15, 2020
Export Citation:
Assignee:
SHANGHAI AWINIC TECHNOLOGY CO LTD (CN)
International Classes:
H03F1/26; H03F1/56
Foreign References:
| CN109842381A | 2019-06-04 | |||
| CN209627327U | 2019-11-12 | |||
| CN109842382A | 2019-06-04 | |||
| CN209233795U | 2019-08-09 | |||
| CN109672413A | 2019-04-23 | |||
| CN209571993U | 2019-11-01 | |||
| CN109004936A | 2018-12-14 | |||
| CN108718198A | 2018-10-30 | |||
| CN202663389U | 2013-01-09 | |||
| US20080238540A1 | 2008-10-02 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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