Infinitely adjustable active digital television (dtv) amplifier with timing and displaying functions

An infinitely adjustable active digital television (DTV) amplifier with timing and displaying functions, coupled between an antenna and a coaxial cable, comprising:

• a LNA amplifier unit, an infinite adjustment unit, and a gain detection and display unit, characterized in that the LNA amplifier unit has a source, a RF input end and a RF output end, the source is coupled to a DC source, the RF input end is coupled to the antenna, and the RF output end is coupled to the coaxial cable;
• the infinite adjustment unit is coupled to a DC potentiometer, and the potentiometer has an output terminal coupled to the source of the LNA amplifier unit for providing bias voltage;
• and the gain detection and display unit comprises a control chip, a display driving circuit and a display screen, and the control chip is coupled to the infinite adjustment unit for collecting an instantaneous voltage and displaying an amplification factor corresponding to the instantaneous voltage on a display screen.