nisha gupta
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hi
i m working on front end receiver. so LNA, transconductance amplifier, passive mixer ans transimpedance amplifier blocks are needed. except transimpedance anplifier other blocks are almost ready..i have designed TIA as well. but i need very low input impedance TIA (in the range of 30-50ohm)
but i getting around 170ohm. i have designed TIA using simple differential OPAMP (single stage) using RC feedback. can anyone suggest anything how to reduce input impedance or some topology in which i can get very low input impedance....
one more query .... i have integrated all blocks in front end receiver... i have calculated overall performance of receiver.. how can i measure individual block performance mainly linearity without adding buffer or balun at the output of individual blocks
i m working on front end receiver. so LNA, transconductance amplifier, passive mixer ans transimpedance amplifier blocks are needed. except transimpedance anplifier other blocks are almost ready..i have designed TIA as well. but i need very low input impedance TIA (in the range of 30-50ohm)
but i getting around 170ohm. i have designed TIA using simple differential OPAMP (single stage) using RC feedback. can anyone suggest anything how to reduce input impedance or some topology in which i can get very low input impedance....
one more query .... i have integrated all blocks in front end receiver... i have calculated overall performance of receiver.. how can i measure individual block performance mainly linearity without adding buffer or balun at the output of individual blocks