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62 Threads found on edaboard.com: Vccs
Dear all I want to design a vccs to implement this function: I(y)<+ tanh(V(x)); I have done that using a verilogA model and I connect it in the cadence circuit which is as in the attached file, the model itself works fine but I want it to act as a real electronic component when connected to the circuit, by means when I change the output re
Use vccs with VtPRBS.
Hi all, I am trying to build a simple fully differential op-amp just use vccs. Here is the single-ended design I do in the cadence.121740 So I am wondering how can I build a fully differential op-amp model. I don't need transistor level design. I need a model so I can change gain, bandwith. It's for my project. So
Use a vccs (G-element) with a PWL source, something like G_chg_pmp 1 0 PWL(1) 2 0 7V,200uA 6V,250uA ..,..... s. e.g.
Hi all, I just start to learn verilog-a and want to create a voltage-controlled current source(vccs) in cadence virtuoso. I learned that cadence would check my syntax automatically and create the symbol if the code is OK. However, when I open a new cellview in verilog-a, I can't save the code, so I can't convert the code to symbol... When
HI, I used the attached circuit to drive led about 10A. if mosfet operate in saturation region, the dissipation power of mosfet is large. so is it possible that mosfet operate in triode region in vccs. and what is differences between them, for example In triode region will cause the current stability problem or mosfet broken.109282
Hello I would like to replace the vccs by a SDD component in the small signal model of GaN HEMT(Using ADS). Could somebody help me in this? How many ports should the SDD be and what should be the equations? Like this ?? 107453
How to understand how power MOS help maintain output voltage of LDO while it works in saturation region? Thanks. Can you build a CS amplifier that his drain voltage (VD) is equal to 0.5Vdd or 2/3Vdd ?? In which region MOSFET is operating? In saturation ? So how it is possible if MOS work as a vccs? Also notice tha
Can anyone suggest me some good circuits working at 90nm for- 1) Current Controlled Voltage Sources (CCVS) 2) Voltage Controlled Current Sources (vccs) 3) Current Controlled Current Sources (CCCS)
Hi guys, I'm trying to translate the model of a this circuit from spice to cadence * HP Memristor SPICE Model * For Transient Analysis only * created by Zdenek and Dalibor Biolek ************************** * Ron, Roff - Resistance in ON / OFF States * Rinit - Resistance at T=0 * D - Width of the thin film * uv - Migrat
Hi, I'm working one generating a vccs in finesim. The code is as follows : Videal ideal 0 1 rpolyres ideal 0 50k gin_current IN OUT pwl(1) IN OUT 0 0 0.1 0 0.2 'i(videal)' Howere, I always get an error saying 'ERROR! variable in static expression' I checked the .sp file and find that it is the 'i(videal)' that causes this pro
here is the here's the problem: In the sim, dropping the input voltage to 0 results in an instant cutoff at the output P-FET. On the breadboard, the output current from the P-FET sloooooooooowly drops to 0 over 5-10 seconds after setting the input/control volt
Hello, I am a newbie of IC. And these days, I really confuse about the "input impedance". According to TWO-PORT, for a VCVS, we should open the output to calculate the input impedance, and for a vccs, we should short the output to calculate the input impedance. But for a OPAMP or OTA, should I open or short the output, or it depends? We know
Hello, I am a newbie of IC. And these days, I really confuse about the "input impedance". According to TWO-PORT, for a VCVS, we should open the output to calculate the input impedance, and for a vccs, we should short the output to calculate the input impedance. But for a OPAMP or OTA, should I open or short the output, or it depends? We know
Hi, I am trying to write a verilog A model for Voltage controlled current source. module vccs(p,n,pc,nc); inout p,n; input pc,nc; electrical p,n,pc,nc; parameter real gain=1; branch (p,n) iSrc; analog begin I(iSrc) <+ gain*V(pc,nc); end endmodule It works fine when there is a load connected to the current sourc
I think you might be able to do this with a parallel controlled current source (multiplier), "sniff" the inductor current and add a variable (perhaps use a ccvs -> vmult -> vccs) parallel current. Macromodel style?
83459 I made circuit for impedance matching. This vccs is small signal model. and I wnat tocalculate K-factor. So I insert Stabfact in this circuit. and then, I click the "simulate" button. But I can't see K-factor. 83460 I can get the S-parameter but can't get the K-factor. yo
Now that I had that great help with figuring out how to use spice I am now hard at it. I am trying to drive at least 2uA of current through a 1Mohm resistor with some capacitance at frequencys of 100hz to 50khz. From what I have read a howland circuit is a possibility though from some testing I have done it appears I need something a little more. O
I am working on trying to make some impedance measurements and have been reading through a bunch of research papers and everyone seems to be using a Voltage Controlled Current Source(vccs) for their measurements. What I can figure out exactly is why they are doing that as compared to a Voltage Controlled Voltage Source(VCVS). To the best I can tell
I suppose it is quite impossible to design this circuit with a supply of 1.2V. Is there an alternative to implement this vccs with such a low supply?How about if i were to implement self-biased cascode? @leo_o2:Hi, even if i were to use a PMOS instead of a NMOS, will there be a significant difference?