High input impedance millivoltmeter circuit schematic

A millivoltmeter is an AC voltmeter used to measure sinusoidal voltage. Mainly used to measure millivolts, microvolts AC voltage below the millivolt level. For example, the voltage input from the antenna of the television and radio, the voltage of the intermediate stage, and the like, and

Rice Flour Millet TV Promotions Smart Voice Edition Decrease 100

The annual rice flour festival came to an end and Xiaomi TV attacked again. On April 6th 00:00 - April 23:59, a total of 9 televisions from 43 inches to 70 inches from Xiaomi TV were promoted across the board. They not only reduced the price by 100 yuan, but also gave a

Which Haimi Di box is the most worthy of 2017?

Haimei Di as an old manufacturer of smart TV set-top boxes for more than 10 years, the R&D companies in the hardware and software quality of TV boxes are the leading standards in the industry. They have successively cooperated with Tencent Video and Mango TV to crea