pk2010
Newbie level 4
Hi,
In almost all the datasheet of GPS LNA i have read so far, all of them say following
"Output is matched to 50ohm, Input just needs a matching inductor". They even write it highlight this in the features of chip on front page that it just needs one inductor for matching. They also specify the value of inductor which is mostly under 10nH.
what i dont understand is
1. when they could match output to 50ohm , why did not they match the input as well and make it standard 50 ohm input and 50 ohm output?
2. and how exactly we users of the chip are supposed to perform the matching part? do we assume that after adding the suggested value of (lets say datasheet says 9.1nH) , it will become a 50ohm input?
Some example datahsheets are
https://datasheet.lcsc.com/szlcsc/Shanghai-Awinic-Tech-AW5005DNR_C146262.pdf
https://www.infineon.com/dgdl/AN250...A.pdf?fileId=db3a3043300464130130210e89596b04
In almost all the datasheet of GPS LNA i have read so far, all of them say following
"Output is matched to 50ohm, Input just needs a matching inductor". They even write it highlight this in the features of chip on front page that it just needs one inductor for matching. They also specify the value of inductor which is mostly under 10nH.
what i dont understand is
1. when they could match output to 50ohm , why did not they match the input as well and make it standard 50 ohm input and 50 ohm output?
2. and how exactly we users of the chip are supposed to perform the matching part? do we assume that after adding the suggested value of (lets say datasheet says 9.1nH) , it will become a 50ohm input?
Some example datahsheets are
https://datasheet.lcsc.com/szlcsc/Shanghai-Awinic-Tech-AW5005DNR_C146262.pdf
https://www.infineon.com/dgdl/AN250...A.pdf?fileId=db3a3043300464130130210e89596b04