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# Even Odd

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218 Threads found on edaboard.com: Even Odd

## Typical differential input impedance for IC

You have to understand mode decomposition, even(=differential) and odd(=single-ended). If you consider only even mode, signal source impedance should be 25ohm as singled-ended, this is equivalent to floating source impedence of 50ohm as far as concering even mode. These concepts are linear, so it is not difficult to (...)

## Odd/even impedances simulation for a not typical structure

Hello everyone. I'm writing here, because I need help/sugestions. To the point: I want to simulate structure, which is presented in attachment (picture no_1.png). Most of popular calculators (such as the TXLine, the AppCAD) has solutions for really typical coupled elements (for e.g. coupled striplines). I try to simulate no_1 structure in

## Characteristic Impedance of Differential Transmission Line

Differential Transmission Lines have 2 impedances.even mode and odd mode.The characteristic impedance of a differential lines is composed of these two mode dependent characteristic impedances.For more information, "RF and Microwave Coupled-Line Circuits", Inder Bahl, Prakash Bhartia,Rajesh Mongia. Artech House

## Even and Odd mode velocities in quasi-TEM

Hi How can I calculate even and odd mode velocities in quasi-TEM mode for transmission lines?

## 8 point radix-2 DIF FFT (Sande- Tukey) algorithm

Hello, I have a project submission on DIF FFT in C code. I have tried so many things but can not get the code to work. #include "fft.h" int fix_fft(fixed fr, fixed fi, int m, int inverse) { int mr,nn,i,j,l,k,istep, n, scale, shift,twid; fixed qr,qi; //even input fixed tr,ti; //odd input fixed wr,wi; //twiddle factor f

## harmonic in the EMI side of a microinverter

What is the effect of harmonics in the EMI filter? odd harmonics? and even harmonics?

## How to find even and odd eigenmodes using CST eigenmode solver or by other means

Hi, I was trying to find the modes of a symmetric photonic crystal based waveguide. The eigenmode solver of CST is doing nice with my requirement but in many publication people are getting even and odd modes within the band gap for a symmetrical structure. I am a bit confused that, do I have to do something to get both the modes or it is the jo

## How to remove ripples from Chopper stabilized Opamp?

Hi, Basic idea of chopping is upconverting signal to the odd harmonics of chopping frequency. However, due to the fi nite bandwidth of the ampli er, some unwanted spurs emerge at even harmonics of the chopper frequency. You should filter them out. One good referance paper about noise suppression of these circuits is the Enz's famous paper which is

## Interdigital Bandpass Filter - Design procedure (Lancaster)

Hello, I am following the design example of an interdigital filter with symmetric coupled lines as given in Microstrip Filters for RF-Microwave Applications (Lancaster), page 141. I managed to calculate the characteristic impedances in even and odd-mode and, consequently, the coupling coefficients. My struggle is to calculate the spacing betwee

## Differential probe & measurements

A pure sinewave has extremely low distortion (any kind of distortion) because it has no harmonics, it just has the fundamental frequency. You can see distortion (even harmonics, odd harmonics, clipping or crossover) if the fundamental frequency is reduced or removed by a notch filter. Differential probes have nothing to do with it and are not used.

## CMOS inverters used as drivers

From reviewing your photo, it appears your signal is ~526 MHz with 45% duty cycle and thus even harmonics as strong as odd harmonics up to 3~4Ghz 1) Asymmetry is could be improved. 2) don't worry about peaks IF you are not worried about 1) . This is normal for asymmetry drive impedance and non-linear C load. 3) if 1) is a problem use

## even and odd signals

Counterquestion: Why do you pick-up a single sentence from the chapter about symmetry properties of fourier transformations instead trying to understand the meaning of the chapter? Decomposition is a mathematical method, it's purpose doesn't depend on the existence of the pure even/odd functions in natural signals, although you surely find some

## Effect of impedance mismatch on ac response

To elaborate chuckey's comment. The first picture seems to show a short piece of 75 ohm transmission line in a 50 ohm system. You get no reflections if the cable length is an even multiple of λ/4 and maximum reflection if it's an odd multiple. Very basic RF engineering. P.S.: I see volker@muehlhaus already showed the same effect with 25

## tcam memory parity bit generation for parameter extractor

please any tell me, whether parity bit calculation possible in tcam memory parameter extraction.. i.e., xor operation can perform unknown x(either 0 or 1) value. another one is, if binary word has unknown term we can say that word is even or odd parity? XOR with an unknown (i.e. X) will be X. e.g. 0 ^ X => X

## help me on CC2500 Interfacing with PIC controller

i have found that, when i write an even no data(eg: 0x02) to a reg of cc2500,i got output always 0x0F when i read same reg. And when i write an odd no data(eg 0x05 (00000101) ) to a reg, i got output one bit rotated 0x82 (10000010). Thanks in advance.

## Single balanced mixer topology without transformer

Normal diode mixers use unbiased diodes, but in case that small DC bias current is used, the conversion loss can be reduced, if is not available high level signal from oscillator. Also DC bias (adjustable) can be used in a diode type harmonic mixer, to make an "even only" mixer operate with odd LO harmonics, or an "odd only" mixer operate (...)

## input impedance of coupled line

Input impedance is function of odd and even mode impedances of coupled lines.Therefore you should find these impedances first by calculating or simulating. You can read something about those in Bahrtia's book.

## Doubts on harmonics, first order harmonics,2nd order harmonics, 1st order power

If you learn English then you will know the words "even" and "odd". Second, fourth, sixth etc. are even. Third, fifth, seventh etc. are odd. A pure sinewave has no harmonics, it is the fundamental frequency only. An amplifier stage with a sinewave input but has even harmonics added to the (...)

## Seeing UART data in Oscilloscope

hi vikky, The usual causes of corrupt RS232 data are in the Baud rate settings not being the same or the Parity Bit ie: even or odd or Off. On your scope you should see for each character, a 10 bit long string, 1 Start bit, 8 data bits and 1 Stop bit. On the PIC pin its a TTL level and the output of the MAX232 +/-9V level. If you can sync your

## HFSS directional coupler

Hello, I need some help in design a directional coupler, I got the results in MWO but they does not match in HFSS, any one know or have a file about special condition to design Directional coupler coupled line in HFSS please help and I know to see the even and odd mode but I don't know how or calculate the even and odd impedance