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Nonlinear resistor: behavioral model (multi-dim Taylor series)

Hi, Does spectre/Cadence support something like an ideal current or voltage multiplier block or anything I could simulate this nonlinear behavior? I would like to build a behavioral model of the following equation: i = g1*Vp + g2p*Vp^2 + g3p*Vp^3 - g1*Vm + g2m*Vm^2 + g3m*Vm^3 + g2vm * Vp * Vm + g32pm * Vp^2 * Vm + g3p2m * Vp * Vm^2

R2R DAC(ditital to analog converter) disadvantage (VCR, LSB)

I tried to design R2R DAC structure at in my circuit. In my thought R2R DAC is more area effective DAC than conventional R-String DAC. However, R2R DAC has some disadvantages. 1. VCR Issue - In CMOS process, poly-silicon resistor or diffusion resistor has voltage coefficient. that is to say, resistor value (...)

What is a reflection coefficient of this circuit?

Hello, Can anyone help me understand what is a reflection coefficient of below circuit? I'm certain that Γ2 is (ZL-Z2)/(ZL+Z2) However what is Γ1 (reflection coefficient at Z=-l)? Is it (Zin-Z1)/(Zin+Z1) or Γ2*e^(-2jβl)? Does Γ1 change if Z1 is replaced by a discrete resistor?124766

selection of motor for A/C

AC motors for compressors always have some special starting arrangements, because the motor is starting under load. For something like a fridge or deep freeze is a big negative temperature coefficient resistor to limit the inrush current as the motor comes up to speed. For air compressors there is a bypass valve that opens when the motor is station

Listening to thermal noise changes

Noise level is changed since the resistor value is changed.What about the temp. coefficient of the resistor ??If it's-for instance-metal film, it will be less sensitive against temp. variations.Check it first..

Reflection coefficient and a transmission line taper

Hello all. I am working on designing a transmission line which involves the use of a taper. One of the issues I am struggling to understand conceptually is this reflection coefficient often shown for your standard exponential, Klopfenstein, hyperbolic tapers like the one attached to this post. So what does not make sense to me here is the l

what type of resistor in tmsc18rf that is less sensitive to temperature?

You need to check in process documentation. The less sensitive are polysilicon resistors but it depends to its doping. The most probably your process provide a few types of poly resistors with differ temperature coefficients.

What is the value of a | 1 | 0 | -1 | -1 | 9 | resistor?

Hi everyone. A few days ago I found a 5 bands resistor with gold on the 4th band. According to Wikipedia, that's an older or specialized resistor. The 5th band is the temperature coefficient. I was able to interpret the value of the resistor. Now I found a 5 band resistor with the following bands: (...)

How can I use KTY10 temperature sensor in a circuit

Hi, KTY10 is the "Temperature dependent resistor with Positive Temperature coefficient" according to the datasheet. Therefore the thing you need to measure is the resistance of this component and make your own scale. This needs to make a voltage divider and measure the voltage and calculate the resistance. I think that's it.

which resistor i use [hlp]

Well, it all depends on what do you need. If you would like minimum area then you must choose the one with the maximum resistance per square. (sheet resistance) Do you need positive / negative / zero thermal coefficient? And then there is noise and noise immunity. You better check you PDK documentation. P.S. rm1 - rmt are probably the resistivity

problem with bandgap reference

Surely the temperature coefficient of the resistors is largely irrelevant as the ratios will track, which is what is important? As the resistors will have different voltages the voltage dependency is not identical. Keith

Temperature detector-Thermistor

A thermistor is just a resistor with a 'bad' temperature coefficient. To interface it to an ADC, you need to convert that resistance to a voltage. The simplest way is to make the thermistor one half of a voltage divider. Pick your reference voltage and other resistor to give the desired range and resolution.

need help! unit resistor change the close loop frequence response

In this circuit, IN is common voltage, and the differential signal input through IP the res fix the coefficient of feedback, now, if i change the value of the res (but not change the proportion), the frequence response will change. if the value increases, the BW becomes narrower and phase margin reduces, BUT THE FEEDBACK coefficient DO NOT CHANGE

when i plot z(1,1) in ads(s-param)

when i plot z(1,1) in ads(s-param) my impedance with negative resistor plot in compress smith chart i want plot impedance with negative resistor( reflection coefficient is more than 1) in y smith,can help me?

Resistor Characterization

Good Day to All! I just have a basic question. I've been out from school and back now and currently I am doing some different resistor type characterizations. I wonder how can I determine the Temp and Voltage coefficient factor for each type of resistors (pdiff, ndiff, poly1, poly2, etc). Does anyone have a sample test bench for this? I (...)

Reflection coefficient basic doubt

Hi May be this is silly.. ive got a doubt.. I ve got a resistor & capacitor load. (R & C in parallel). I measured the S11 using a VNA the reflection coefficient reading is something like 0.349, -150 degree.(freq=500MHz) i'd like to know the effect of this load on forward & reflected waves. That is i know some part of the forward power will

Positive and Negative coefficient resistor

Hi. I need to used positve and negative temperature coefficent resistance. Can anyone help me with it. How should i proceed. I am working with .35um technology Thanks in Advance

12 bits R-2R DAC design

I want to use poly resistor to design a 12 bits voltage mode output dac based on R-2R structure. in spite of resistor matching, I found that the voltage coefficient of ploy resistor affect dac accuracy much, any good way to remove this effect or what other structures for 12 bits voltage mode output dac design? thanks!

What is the color code for a 4.7 ohm resistor?

In metal film resistors that have three significant figures and five or six colors it will be yellow (4) violet (7) black (0) silver *0.01 tolerance x temperature coefficient x Alex

how to change the temperature coefficient in cadence

Hello! Do you know if i can change the temperature coefficient of a resistor in my simulation and how? I am using cadence. Thank you very much