AM detector

C

contau

Member

• Mar 24, 2010

• #1

i have made a AM detector. Anyone tell me about the quality of this detector?

 

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M

MrAl

Well-Known Member

Most Helpful Member

• Mar 24, 2010

• #2

Hi,


Just a quick note...
Is that a very high current rectifier diode (25 amps)? That's not the right kind for something like this if it really is a high current diode
as the operating frequency is much lower than you really need for a detector diode.
Typical diodes used for this kind of thing are 1N4148 and germanium types the part numbers someone else here can provide
(like 1N34 or something like that).

 

Last edited: Mar 24, 2010

C

contau

Member

• Mar 24, 2010

• #3

@MrAl How about RC circuit? do the RC values suit for overall circuit?

 

Hero999

Banned

• Mar 24, 2010

• #4

You need a low pass filter which will cut-off above the highest frequency of the signal being modulated.

 

audioguru

Well-Known Member

Most Helpful Member

• Mar 24, 2010

• #5

The resistor values are very low and might load down the circuit feeding it.

 

Hero999

Banned

• Mar 24, 2010

• #6

I forgot that load impedance must be factored in to the resistor calculation.

 

C

contau

Member

• Mar 24, 2010

• #7

Hero999 said:

I forgot that load impedance must be factored in to the resistor calculation.

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this only need to use the circuit buffer to match the in-out impedance . i mean how the frequency respone of detector is. is it flat in audio freqs and does it need more components ?

 

C

contau

Member

• Mar 24, 2010

• #8

audioguru said:

The resistor values are very low and might load down the circuit feeding it.

Click to expand...

i don't understand ur mean ...can you say more informations?