Title:
STEPLESS ADJUSTABLE ACTIVE DIGITAL TELEVISION (DTV) AMPLIFIER CAPABLE OF DISPLAYING AND TIMING
Document Type and Number:
WIPO Patent Application WO/2021/051708
Kind Code:
A1
Abstract:
The present invention proposes a stepless adjustable active digital television (DTV) amplifier capable of displaying and timing, which is connected between an antenna and a coaxial cable, aims at adjusting an amplification factor of the amplifier, and measuring and displaying an amplification factor of the amplifier, and is characterized by comprising an LNA amplification unit, a stepless adjustment unit, a gain detection and display unit; the LNA amplification unit has a source end, a radio-frequency input end, and a radio-frequency output end, the source end being connected to a direct-current source, the radio-frequency input end being used to be connected to the antenna, the radio-frequency output end being used to be connected to the coaxial cable; the stepless adjustment unit comprises a potentiometer connected to the direct-current source, the output end of the potentiometer being connected to the source end of the LNA amplification unit, so as to provide a bias voltage; the gain detection and display unit comprises a control chip, a display drive circuit, and a display screen, the control chip being connected to the stepless adjustment unit to acquire a real-time voltage, and displaying, on the display screen, an amplification factor corresponding to the real-time voltage.
Inventors:
LIU XIAOBING (CN)
LI QIN (CN)
LI QIN (CN)
Application Number:
PCT/CN2019/129721
Publication Date:
March 25, 2021
Filing Date:
December 30, 2019
Export Citation:
Assignee:
JIANGXI INNOVATION TECH CO LTD (CN)
International Classes:
H04N5/44; H04N5/14
Foreign References:
| CN110572533A | 2019-12-13 | |||
| CN204928842U | 2015-12-30 | |||
| CN204905447U | 2015-12-23 | |||
| JP2009177705A | 2009-08-06 | |||
| CN101697479A | 2010-04-21 | |||
| CN102868369A | 2013-01-09 | |||
| JP2009152833A | 2009-07-09 |
Attorney, Agent or Firm:
ZHONGSHAN MINGYANG PATENT TRADEMARK OFFICE (GENERAL PARTNERSHIP) (CN)
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