The amplifier is a device that can amplify the voltage or power enlargement of the input signal, which is composed of an electronic tube or a transgender, a power transformer and other electrical components.Used in various devices such as communication, broadcasting, radar, TV, automatic control.
Make amplifier
Step 1: Wash the prepared empty cans. After cleaning the internal drinks, dry it or dry it to do the next step.Step 2: After cleaning the empty cans, remove the ring on the stretch of the empty tank with the corresponding tool, and then perform the next step.Step 3: After removing the pull ring of the empty -jam, cut the bodies that can be pulled with scissors with scissors. The position of the cut is the bottom of the empty cans. Cut the entire bottom of the canas and discard it, and then perform the next operation.Step 4: After removing the entire bottom of the empty cans, use scissors to cut the body of the empty canned body again, cut it along the middle of the empty cans, and then open the empty cans of the empty can be opened, and then the next operation is performed.Step 5: After cutting the bottle body of the empty cana, the small holes that the empty can be tank upside down upside down, insert it on the antenna of the prepared wireless router, and then perform the next step.
Amplifier price
Bull device principle
The amplifier is actually an analog Fourier converter. The output of the locking amplifier is a DC voltage, which is proportional to the signal amplitude of a specific frequency (parameter input frequency) in the input signal.Other frequency components in the input signal will not make any contribution to the output voltage.The frequency of the two sine signals is 1Hz, and there are 90 degrees of phase difference. The result obtained by multiplication with a multiplier is a sinusar signal with DC bias.If it is a 1Hz and a 1.1Hz signal multiplication, the result obtained by the multiplication of the multiplication of the multiplication is the contour to the sine modulation signal, and the DC bias is 0.Only signals that are completely consistent with the reference signal frequency can get DC bias at the output of the multiplier, and other signals are communication signals on the output end.If a low -pass filter is added to the output of the multiplier, all the communication signal components are filtered out, and the remaining DC component is only the amplitude of the signal component of a specific frequency in the input signal.

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