Interface Analod signal to ADC

Discussion in 'General Electronics Chat' started by MilPrasad, Jan 12, 2014.

  1. MilPrasad

    Thread Starter New Member

    Jan 12, 2014
    I designed a transistor based amp to amplify a FM stereo multiplex signal. The transistor amp was correctly biased and could amplify the signal from 500mV to 4.5V. I observe this amplification using oscilloscope. Then I was hoping to do digitally DE-multiplex the signal using DSP. After several trials I found that some thing is wrong and try to convert the sampled signal back to analog using DAC. But I found that the observed signal is distorted and only had a peak of 1V. :confused:

    1) Is this happening due to low output impedance of the amplifier?
    2) How can I resolve this?
    3) What are the high output impedance configurations?