super
Full Member level 2

Dear all:
I don't understand some concept.
1. LNA and Mixer are AC couple to get rid of second-order
intermodulation products generate by LNA.
Why AC couple can improve second-order
intermodulation products from LNA ???
2. The result high impedance at signal frequency improve CMRR
while low impedance , both at low and high frequency , improve
IIP3
I don't understand this means .
Why can improve IIP3 ??
Somebody can help me ?
THANKS .
I don't understand some concept.
1. LNA and Mixer are AC couple to get rid of second-order
intermodulation products generate by LNA.
Why AC couple can improve second-order
intermodulation products from LNA ???
2. The result high impedance at signal frequency improve CMRR
while low impedance , both at low and high frequency , improve
IIP3
I don't understand this means .
Why can improve IIP3 ??
Somebody can help me ?
THANKS .