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162 Threads found on Linearity Gain
Where is the equation for the non-linearity?
Hi, You ask "what is it ? and why is it done ? and how ? and does it differ from an ADC type to another ?" Generally "calibrating" means cancelling or reducing errors. Those errors can be "offset, gain, thermal drifts, linearity..." Klaus
You should start with an analysis of expectable ADC or DAC errors and consider how far they can be corrected by calibration means. It's quite common to correct offset and gain errors of data converters. Besides this easily correctable errors, data converters have also linearity errors which are usually not correctable with acceptable effort. In
Hi, Can anyone suggest me DC offset cancellation circuit for high frequency application (50 MHz) circuits. I used the continuous time feedback model circuit include LPF+OTA, but it degrades the opamp gain and linearity at common mode output votlage range. I am not sure the sampling clock based DCOC will work for high speed applications or n
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 Figure
The keyword is "NEGATIVE FEEDBACK". Negative feedback alwqays reduces the gain and - at the same time - improves linearity and reduces the influence of tolerance uncertainties. For stabilizing the DC operating point (against tolerances and temperature) we always use an emitter resitance - however, because of the (perhaps unwanted) (...)
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...
Keep in mind old electrolytics can dry out and these are brute force bridge linear supplies with Class A or A-B Amps with an overall power efficiency of 2~15% or so but high linearity. If you have specs on gain, IP3 , BW , noise level, etc , that would be a good start for must haves.
Getting a good gain is more important for me then Noise Figure. The first and the most important parameter of ANY RF mixer is the linearity, second is the Noise Figure, and third is the gain.
Hi all, I'm designing a filter for which the linearity is of higher importance. I noticed that linearity will increase if I have higher current in my circuit legs. But I wanted to know on what all parameters the linearity is mainly dependent? Is it dependent on gain and phase margin of the opamp I have used? Or is (...)
Class A depends on avoiding the region of saturation with around a 2V margin where linearity from current gain drops rapidly. Negative feedback improves this linearity and also lowers output impedance, but also lowers input impedance by the feedback ratio. Class D depends on avoiding the linear region by switching between two drivers, one (...)
I have designed the Microwave Circuit at 2 to 3 GHz. I want to draw the equivalent circuit for the Microwave circuit at 2 to 3 GHz. I don't know, how to draw equivalent circuit for 2 to 3 GHz Microwave Circuit and how to obtain the equation for gain, Noise Figure, linearity, once we draw equivalent circuit. If you have any material regarding on
Most of the high-linearity VGAs use an integrated step attenuator in front of a fixed gain amplifier, as for example LMH6521 from TI: Advantage using a step attenuator in front of the fixed gain amplifier is not only to keep good linearity, but also to improve input/output match, and the gain flatnes
Hi, I am trying to write a Real number Model for a Programmable gain amplifier and came across the following expression for limiting the output voltage , can some one please help me understand how this is derived? Vodif = Vomax*tanh(Av*(INP-INN)/Vomax) where, Vodif is the closed loop differential output voltage. Av is the closed loop volt
A gm-C circuit (OTA + capacitor) is perfectly working as integrator, if it's feeding a high impedance load, e.g. a MOSFET buffer. You should be able to find plenty of literature examples. The resistors provide "source degeneration", reducing the OTA'S gain and increasing it's linearity and input voltage range.
I think we measure VCO gain in the range frequency linearity with vtune or vcontrol only. Let say the linearity range from 2v to 2.5v you have VCO frequency 2G and 2.3G , so the VCO gain will be (2.3-2)/(2.5 - 2) = 600Mhz/V
hi can any1 tell how to do linearity measurement of an amplifier using transient analysis. i hv done it using PSS analysis. but somebody told me it can be done by transient analysis also. i did'nt understand exactly... hw it is possible. plz help me.
Hello, I'm a fresher about analog and RF design, i want to design a VGA, the noise figure below 10dB, and the bandwidth is 40MHz~90MHz, the gain range is 32dB(-32dB to 0dB or 32dB to 0dB, is there any difference) with the gain step is about 0.5dB, and also with good linearity. which structure of the VGA can be used to reach the spec, how can (...)
hi i have designed a downconversion mixer, i hv measured conversion gain, noise figure, linearity but not able to measure bandwidth or freq range of mixer. i tried PSS + PSP but in this only IF freq i m able to sweep but did'nt get the option to sweep RF frequency. can any1 suggest me wat to do
GNSS satellite system use CDMA modulation, so the circuit needs a linear amplification. At this low output power level (+10dBm) the amplifier efficiency probably is not such important, so a Class-A Power Amplifier would be a good option getting good linearity and high gain.