模拟乘法器应用及调幅电路（国外英文资料）.docVIP

模拟乘法器应用及调幅电路（国外英文资料） Experiment six analog multiplier and modulation circuit One, the purpose of the experiment 1, master AM, DSB, SSB modulation principle and properties of 2, master analog multiplier MC1496 () of  principle and adjusting method 3, the modulated wave  relationship with modulation signal and carrier signal 4, master the use of the principle of collector modulation  transistor 2, 1, simulated experimental instrument oscilloscope  note  one 2, stabilize the power supply Spectrum analyzer one High frequency millivoltmeter one A: one for all High frequency function signal generator one 7, low-frequency signal source  note  one 8,  sinusoidal experiment board, power amplifier, am  three blocks, experimental principle and knowledge modulation  is what will signal to be transmitted on the load to the high frequency oscillation signal. The load process is actually utilized Signal control some parameters of high frequency oscillation signal amplitude, frequency, phase    make this parameter changes over signal  it Its the modulation process. Modulated methods include continuous wave modulation and pulsed wave modulation. The modulation that simulates a continuous signal is actually a continuous wave modulation. Modulation  if use signal control in the process of high frequency oscillation   carrier signal amplitude, frequency or phase. We respectively Call it amplitude modulation, frequency modulation, and modulation.  on time domain amplitude modulation wave amplitude of the carrier wave change with the changing rule of the modulation signal. Frequency domain on the frequency of   before and after the transformation Signal spectrum structure unchanged  is the undistorted signal spectrum on the frequency axis linear move. Amplitude modulation frequency   mix before and after the detection of spectrum diagram as shown in figure 6-1  omega o Ω Ω 1 2 3 Ω Ω 4 phase for vibration Of the carrier frequency Omega omega 0 - Ω omega 3 0 + Ω om