Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
there are two kinds of unstability1)the rf unstability(2)the feed DC power unstability:
the resistor in the drain only conquer the feed DC unstability,but not RF unstability,try to add a resistor in the rf chain
I used a similar device a while ago and the problem was stability at lower frequencies. To overcome this, add a resistor in series with gate, bypassed by a capacitor at your amplifier frequency. Should help!
Instability not necessarily occurs in your band of intest. It can occur everywhere!
There are several ways to stabilize the transistor:
1. add a series resistor at the gate.
2. add a parallel resistor at the gate
3. series resistor at drain
4. parallel resistor at drain
5. a feedback (drain to gate) resistor with capacitor.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
1)the rf unstability(2)the feed DC power unstability:
