模拟乘法器应用及调幅电路（Analog multiplier applications and am circuits）.doc

模拟乘法器应用及调幅电路（Analog multiplier applications and am circuits）.doc模拟乘法器应用及调幅电路(Analog multiplier applications and am circuits)
Experiment six analog multiplier applications and am circuits
One purpose of the experiment 1, grasp the principle and properties of AM, increase DSB and SSB modulation
2, master analog multiplier (MC1496) working principle and adjustment methods of La
3, the research has shown the relationship between wave and modulation signal and carrier signal
4, grasp the principle is observed using transistor collector for amplitude modulation
Two, experimental instrument 1, a note the analog oscilloscope
2, a regulated power supply
3, spectrum analyzer one
4. High frequency voltmeter
5, multimeter
6 、 high frequency function signal generator
7, pay attention to the low frequency signal source a
8, the experiment board sine, power amplifier, amplitude modulation three block three, the experimental principle and the related knowledge is "from modulation signal to be transmitted to the high frequency signal on load". The loading process is actually utilization
The control signal of a high-frequency oscillation signal amplitude, frequency and phase parameters of the exergy make the parameters with the signal changes of the exergy
Modulation process.
Modulation modes include continuous wave modulation and pulse wave modulation. The modulation of analog continuous signals is actually continuous wave modulation.
If the modulation process exergy send signals to control the high-frequency oscillation signal the carrier amplitude, frequency or phase. We respectively
They are called amplitude modulation, frequency modulation, and phase modulation.
The time domain of the carrier amplitude modulated wave energy changes with the change of the modulation signal. The frequency domain and frequency conversion of exergy exergy
The signal spectrum structure is invariant exergy signal spectrum without distortion in the frequency axis linear movement.
The amplitude spectrum before and after mixing the exergy exergy