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Recent content by ah.vinod

  1. A

    Test Bench for CIC decimation(5) filter

    Hi TrickyDicky, Can you please explain in detail. I dint get your point of defining "own file type". I am also new to VHDL. So need help. Regards Vinod A H
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    transient response performance DCDC vs LDO

    Can anyone please throw some more light on this topic.
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    Transient Response of LDO for Load switching at GHz

    Hi all, I have a HDMI Rx which switches at few Giga bits per second. I am using an LDO to Power the HDMI Rx IC. So how should i choose the LDO based on transient response. I know how to choose LDO based on Input voltage, output voltage and current drawn. But i am not sure how to choose based...
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    Effect of S11 and S22 of LNA on Noise Figure of system

    Hi all, I am looking for answer in a system level. I am a board design engineer. So i understand little about IC design stuffs. So basically i am trying to understand if S11 is very bad (high mismatch loss) compared to noise figure of the LNA, should i consider S11 in Friss Formula for...
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    Effect of S11 and S22 of LNA on Noise Figure of system

    Hi, I am designing a TV Rx ckt (circuit). I am having LNA at front end. The LNA is having a S11 of 5dB and S22 of 5dB. Overall Noise figure of system is 6dB. So i want to know if i change Input impedance matching ckt of LNA to improve S11, will the noise figure of system improve? Also if i...
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    Effect of DC Supply voltage ripple on LNA Noise figure and Gain

    Hi all, Thank u for clarifying my doubt on ripple effect on LNA. I have one more query. The LNA is followed by a Silicon Hybrid Tuner IC and Demodulator IC. The Tuner and demodulator is also powered from 3.3V DC Supply with ripple of 15mVpp. The demodulator output is digital signal which is...
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    Effect of DC Supply voltage ripple on LNA Noise figure and Gain

    Hi all, I need to know effect of DC Supply voltage ripple on LNA Noise figure and Gain. I am designing a TV Receiver where the front end is a LNA. The LNA is connected to 3.3V DC Supply which has ripple of 15mVpp. I am failing the sensitivity requirements for TV receiver by 6dB. SO could it be...
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    Capacitor Resistor Inductor Crystal Lifetime formula

    Hi all, I need to know what are the formulas for calculation of lifetime of the following devices. 1) MLCC 2) Tantalum capacitor 3) Resistor 4) Inductors 5) Crystals 6) LED's I need lifetime calculation formula in terms of component heating or temperature rise or rms current or voltage etc...
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    Ferrite Bead used as RF Choke instead of inductor

    Hi all, Can a Ferrite bead be used as RF Choke instead of inductor being used as RF Choke in LNA Biasing circuit. attached is the application circuit Regards Vinod
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    RF Choke operated above SRF

    Hi all, Can a Ferrite bead be used as RF Choke instead of inductor being used as RF Choke in LNA Biasing circuit. i am able to find Ferrite bead which suits my application. so only i am asking. Regards Vinod
  11. A

    RF Choke operated above SRF

    Hi, Can u please provide a reference for "even though" case as it will help me better understand inductor and take a better decision. Regards Vinod A H
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    Why Inductor should be operated above SRF

    Thank u very much for guiding me to right place and also giving me better knowledge of LNA circuits
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    RF Choke operated above SRF

    In RF designs, why should a Inductor should not be operated above SRF region even though just above SRF the impedance is still High. I am looking for RF choke application used in typical LNA MMIC. i am using 1 uH inductor whose SRF is 400MHz while my frequency of operation of LNA is 40MHz to...
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    Why Inductor should be operated above SRF

    Hi, the LNA used is RF3827 part from RFMD. attached is the datasheet. can u please confirm whether the Choke with SRF 400MHz can be used. Also can u elaborate on the concept of dependency of load and choice of RF choke SRF and it effect on instability of LNA. I am very new to RF board design...
  15. A

    Why Inductor should be operated above SRF

    Hi, Attachment shows my application. the Inductor Lc is used as RF choke. I cannot use a resistor because it will alter my dc bias point of LNA. the LNA output contains 40MHz to 860MHz while the RF Choke SRF is 400MHz and posses high impedance greater than 600 Ohms till 860MHz. So can i still...
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