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Old 7th June 2003, 04:03 AM   #1
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Default Amplify weak signal to stronger...

Help me please, draw me a schematic that use to amplify weak signal. Just for one pole. Using MOSFET irf1404, input signal is positive pole and output can be pos or neg pole. Pleeassseee.... just a little simple schematic.....
or email me tzyeong@tm.net.my
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Old 7th June 2003, 04:38 AM   #2
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Hi Mikka,
you have to specify:
1. Amplification Factor in dB or as multiplicator
2. Maybe Source impedanz also
3. Dynamicrange you want to have on Output.(Peaklevel)

Andreas
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Old 7th June 2003, 05:38 AM   #3
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Actually I'm not using it in audio amplifier. I need is only a simple schematics that can control a powerful 540 motor's speed.


1. Amplification Factor in dB or as multiplicator
mmhhh... I think it's very low, the max signal is about 40mA around. The signal output is from IC.


2. Maybe Source impedanz also
I'm using two 9.6V 2800mAh stick pack batteries parallel connected. The amps output from the Batteries is "can be say" high.

3. Dynamicrange you want to have on Output.(Peaklevel)
I think The load of the motor need (peak level) is about 50 amp or above. (my multi tester cannot handle that high or amp)
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Old 7th June 2003, 05:56 AM   #4
jleaman is offline jleaman  Belgium
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Default Re: Amplify weak signal to stronger...

Quote:
Originally posted by Mikka
Help me please, draw me a schematic that use to amplify weak signal. Just for one pole. Using MOSFET irf1404, input signal is positive pole and output can be pos or neg pole. Pleeassseee.... just a little simple schematic.....
or email me tzyeong@tm.net.my

It is not a simple thing to do that is the problem your not listening to me in the other thred you posted. Do what i sujested. uses the toggle switches. building a fet controler with your knowlege is not going to work.
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Old 7th June 2003, 06:27 AM   #5
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It's not I'm not listening to you, it's because you always not giving me enough information to build the switching thing. Can you show me how to make it work? Or show me in a diagram. I've been waiting for your schematics and waiting to buy the parts to finish it. When can you give meee.....
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Old 7th June 2003, 06:28 AM   #6
jleaman is offline jleaman  Belgium
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Time man patiance. nothing happens over night.
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Old 7th June 2003, 06:32 AM   #7
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need to wait again!! tell me what parts do I need to buy first, cause school day is few day ahead....
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Old 7th June 2003, 06:34 AM   #8
jleaman is offline jleaman  Belgium
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you need some switches like i showed you in the first post but some that can handle current and yuo need 4 of them..
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Old 7th June 2003, 06:36 AM   #9
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(writing down) OK, then....
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Old 7th June 2003, 07:01 AM   #10
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> > > > > >
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