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DIY 5X low wattage amplifier for Biotech research

gandalf

Aug 24, 2013
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I'm looking to construct a very low wattage amplifier for some biotech research. I was hoping someone on here would have some pointers for constructing such a device as the cost from the companies who make low wattage amplifiers doesn't fit our startup budget (we have more time than money it seems!).

My background is software and my partner's background is chemical engineering with some wafer fab experience in the 50s and 60s, so we can probably figure things out if we get pointed at the right parts to bang our heads on.

Thank you in advance!

Here is a diagram that describes the inputs and outputs, the cyan box is the ideal wide band amplifier, and the yellow boxes would be less ideal selectable frequency or completely separate amps that support those frequencies.

GeneralDiagram1_zps1186bc0b.png


And here it is in text as well:

Input:
10 V RMS & 3mA input
Sine wave
50 OHMS impedance match
300 kHz to 3.3 MHz

Output:

50 V RMS
Sine wave
50 OHMS impedance match
15 mA
wide band 300 kHz to 3.3 MHz
OR separate amps that will output the following frequencies
300 kHz
1.6 MHz
3.0 MHz
3.3 MHz
 
Last edited:

duke37

Jan 9, 2011
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The voltages, currents and impedance do not match. 10V into 50R is 200mA.

3.3MHz seems to be transmogrified into 3.3mHz.
A wideband amplifier should be possible.
 

CDRIVE

Hauling 10' pipe on a Trek Shift3
May 8, 2012
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Why do you need power output levels this high?

Chris
 

gandalf

Aug 24, 2013
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The voltages, currents and impedance do not match. 10V into 50R is 200mA.

3.3MHz seems to be transmogrified into 3.3mHz.
A wideband amplifier should be possible.

Thank you for pointing out the incorrectly transmogrified units, I just fixed them. Will get back after talking with my partner on your other point.

Thank you!
 

CDRIVE

Hauling 10' pipe on a Trek Shift3
May 8, 2012
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Hi gandalf, are you going to answer my question?

Chris
 

gandalf

Aug 24, 2013
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Why do you need power output levels this high?

Chris

The application involves delivering the signal through some layers of material that dampen the RF signal before impacting the medium. We want to see if we can add more layers and still get the same effect on the medium. But we need more power to get through the additional layers.
 
Last edited:

CDRIVE

Hauling 10' pipe on a Trek Shift3
May 8, 2012
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Thank you for the explanation. I was concerned that something like this could be used for malicious RF transmission.

Chris
 
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