LNA Collector inductor or resistor
时间:04-06
整理:3721RD
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Hello,
I am attempting to design a LNA with a BJT. Why would I use a collector bias resistor instead of a large collector inductor or LC parallel resonant circuit?
The only advantages I can think of are:
Resistor:
1. Gain over a larger bandwidth
2. Impedance matching would be easier over a broader range of frequencies.
Inductor or parallel LC circuit
1.Would allow me to design with a smaller supply voltage.
Has anyone else got any ideas. Thankyou
I am attempting to design a LNA with a BJT. Why would I use a collector bias resistor instead of a large collector inductor or LC parallel resonant circuit?
The only advantages I can think of are:
Resistor:
1. Gain over a larger bandwidth
2. Impedance matching would be easier over a broader range of frequencies.
Inductor or parallel LC circuit
1.Would allow me to design with a smaller supply voltage.
Has anyone else got any ideas. Thankyou
hi
some times designer put some resistor in collector(or base or emitter) for stability of amplifier.in the case of collector resistor,the value of resistance is usually low about several ohms.maybe you should consider this point of view too
