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63 Threads found on edaboard.com: Lna Linearity
Now depends by the linearity requirements of your design. Most of the MMIC available on the market have P1dB higher than +16dBm, but their current consumption is in 40mA to 100mA range. Using a single stage transistor amplifier (lna if want to name), you can get +16dBm output power for less DC current consumption.
The first important thing in lna design is to carefully select a LOW NOISE active device which can meet simultaneously all the design parameters as: Noise Figure, Gain, linearity, and Stability. There are many things to follow designing a good lna but most important are: designing the input matching network for good compromise between Noise (...)
What kind of lna ??? Frequency, Gain, linearity, Noise Level, Wideband/Narrowband, Topology, Process etc. etc... ?? Please don't ask such questions that carry any information at all...
The initial 10mils it is relative thin substrate for a lumped circuit design. It happen that right now I am doing a GPS narrow-band lna design for a particular project made on 60mils substrate. There are no microstrip matching components, just the usual inp/out ustrip transmission lines, and lumped inductors and caps. Playing in the simulator just
Hello all, I have few questions related to linearity of lna: a) How does the 1 dB compression point and IIP3 point changes with the number of fingers in the transistor? I am using 400um transistor. Without adding any number of fingers, P1dB is -22dBm and IIP3 -14.6dBm. But when I changed it to , 14 fingers with 10um /finger my P1dB impro
linearity parameters are rarely measured on a low-noise amplifier with a gain below 20 dB. You never indicated what signal level your lna should handle. In a good receiver, stages AFTER the lna are important in linearity considerations. With your lna, you should indicate the typical signal power at its (...)
I am going to design an lna for 60ghz or higher . I have read some texts and papers but I couldn't gain a good viewpoint about of which type of inductor ( transmission lines , active inductor , pasive spiral inductor ) I have to use in my design with respect to all things such as area , power , linearity . noise , gain , stability and other layout
Typical lnas are designed for the best NF which often limits the amplifier linearity to low-level signals. Amplifier final stage is responsible for a high P-1 dB. Distribute lna gain between the first stage having a low NF, and second stage with a high P-1 dB for best results. Both parameters can rarely be met in one stage.
I would like to measure the gain of my lna using a VNA. I understand the concept behind: b1 = S11a1 + S12a2 b2 = S21a1 + S22a2 S21 = forward transmission = b2/a1 = signal out of port 2/signal incident at port 1 S12 = reverse transmission = b1/a2 = signal out of port 1/signal incident at port 1 S11 = input reflection = b1/a1 = r
hello all.. For CMOS Ultra Wideband applications (UWB) of Low Noise Amplifier there exist a trade off between few design parameters viz.... 1. power consumption 2. wide bandwidth 3. Moderate but flat gain on entire BW 4. Low Noise Figure 5. linearity / IIP3 i m searching of IEEE papers but every i found so much confusing trade off...if i m
Dear all, I work for a RF receiver system design now. I need define RF down-conversion mixer parameter and circuit that mixer following lna. One of RF mixer circuit performance is Gain=3dB ,IIP3=9dBm OIP3=12dBm; another circuits RF mixer performance is Gain=10dB ,IIP3=2dBm OIP3=12dBm.From reduce the receiver NF, i could choose the second RF down
Hi, I am a little unclear w.r.t the difference between a Line Amplifier and the general power amplifier or lna? Is the difference only interms of applications like CATV and transmitters? Also, can the linearity of a Line Amplier be increased by using a hybrid? Thanks.
Why most of the lna/PA output are differiantial pair lines? Is there any relation to improve linearity? Thanks
Hi guys, I want to design a low noise, high linearity lna at 2.45GHz with a DC voltage up to 5V. What transistor do you recommend? Thanks! Zhongjianwufeng
-For wideband lna, you should absolutely use CasCode configuration at those frequencies -Gain control can be implemeted by adding switched resistor based you can select the right resistor values by switching CMOS FETs digitally. -linearity can be found the right OP of the amplifier.Optimization is necessary.
If you use pHEMT in cascode configuration, you may obtain wideband lna with relatively low noise and high gain. Look at for discrete pHEMTs..
SAW filter before lna increase the NF by IL of SAW filter, SAW after lna effects it's linearity -> P1DB is decreased by IL of SAW filter
Hi,everyone I am now to design a 1.5G lna with two gain mode in cmos 0.18 . The architecture is attached later.When Vg1 is 1.8V, and Vg2 is 0,lna is high gain mode;but,when Vg1 is 0 and Vg2 is 0.6V,lna is low gain mode.The post simulation shows a bad linearity in low gain mode,that is not allowed. The lineariity is main (...)
Hi, I am designing wide band lna and freq range is 0.7~2.7GHz am using noise cancelling technique, but gain is not flat. and linearity is poor in 0.7GHz than 2.7GHz. Is there possible to use shunt peaking inductor to get flat gain and how to improve linearity (I'm using CADENC for simulation)
Hi, I am designing wide band lna and freq range is 0.7~2.7GHz am using noise cancelling technique, but gain is not flat. and linearity is poor in 0.7GHz than 2.7GHz. Is there possible to use shunt peaking inductor to get flat gain and how to improve linearity (I'm using CADENC for simulation)