Hello everyone. I dont know to cascade several RF amplifiers (such as this MAX2611) directly (just use a coupling capcacitor to isolate thems) is good or not. Will it be very sensible to noise and easy to oscillate? will the common power supply will provide the path for signal's return to cause oscillation? Rf cricuitry is really hard to design...I searched a lot but seldom to talk about using an IC for cascading. Most are using transistors.
The reason to cascade is because my detecting signal's power is only -60dBm detected by 50 ohms spectrum analyser (so Vpp is only 0.6mV approximately). I need to amplify it and feed it to comparator for zero-crossing detection and comparator's input I think it should be at least 50mv to provide a good detection.
This link is the data sheet of max2611. The gain is only 18dB (so 0.6mv becomes 6mV approximately). I need to amplify it again.
http://docs-asia.electrocomponents.com/webdocs/0ac4/0900766b80ac4985.pdf
The reason to cascade is because my detecting signal's power is only -60dBm detected by 50 ohms spectrum analyser (so Vpp is only 0.6mV approximately). I need to amplify it and feed it to comparator for zero-crossing detection and comparator's input I think it should be at least 50mv to provide a good detection.
This link is the data sheet of max2611. The gain is only 18dB (so 0.6mv becomes 6mV approximately). I need to amplify it again.
http://docs-asia.electrocomponents.com/webdocs/0ac4/0900766b80ac4985.pdf