Iawia
Member
Hi Guys,
Just meddling with AM radio construction and got the resonator circuit to provide the frequencies of approx. 540 - 1610 kHz, my next task is to put it through the audio amplifier. The radio circuit attached is based on an AM Power amplifier circuit within the LM386 datasheet.
Got a few questions:
1. How to expand the database for NI's Multisim? I am trying to use component LM386 (audio amp), and it is not included in the student edition of the software. Do I go to Texas Instrument's website to obtain the file so that I can import this as a component in Multisim?
2. I did not know how to simulate the 'speaker', so I just made it a 8 ohm resistor. Should this be sufficient?
3. The LM386 manual places a 'ferrite bead' in parallel with the 47 ohm resistor. What is this purpose of the ferrite bead? I could not find ferrite bead in multisim so I used a 5 mH inductor. Is this ok to do?
Any help with be appreciated. Thanks for much in advance!
-t
encl LM386 datasheet
encl. my radio circuit
Just meddling with AM radio construction and got the resonator circuit to provide the frequencies of approx. 540 - 1610 kHz, my next task is to put it through the audio amplifier. The radio circuit attached is based on an AM Power amplifier circuit within the LM386 datasheet.
Got a few questions:
1. How to expand the database for NI's Multisim? I am trying to use component LM386 (audio amp), and it is not included in the student edition of the software. Do I go to Texas Instrument's website to obtain the file so that I can import this as a component in Multisim?
2. I did not know how to simulate the 'speaker', so I just made it a 8 ohm resistor. Should this be sufficient?
3. The LM386 manual places a 'ferrite bead' in parallel with the 47 ohm resistor. What is this purpose of the ferrite bead? I could not find ferrite bead in multisim so I used a 5 mH inductor. Is this ok to do?
Any help with be appreciated. Thanks for much in advance!
-t
encl LM386 datasheet
encl. my radio circuit
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