[SOLVED] Passive vs Active Mixers

[rfndmw]

Hi,

In an application note for mixer parameters from Maxim, it is mentioned that:

"A major advantage of passive mixers is that they can also be used as frequency upconverters."

The link for the application note is: **broken link removed**

Does it mean that active mixers have some disadvantage when used as up converters?

 

[Miguel Gaspar]

Yes because remember that active devices introduce electroic noise and then you amplify them.

 

[rfndmw]

Hi Miguel,

Thanks for the reply. If this is case, then practically, are active up converters never employed?? If they are then are there any specific applications for which they are preferred?

 

[thannara123]

The link not working for me

 

[tony_lth]

When the active mixer noise is not important in your system.
And the active mixer can give you signal gain.

 

[rfndmw]

Thanks for the replies.

@ Thannara: If the link is not working please follow this on the maxim website:

Maxim > App Notes > Basestations/wireless infrastructure Communications circuits Wireless and RF