Search Engine www.edaboard.com

# Floating Node

72 Threads found on edaboard.com: Floating Node

## [moved] Problem with full bridge rectifier!

Hi, the problem is the voltage relationship. The input is floating related to your GND (symbol) somehow. Is it simulation only, or real world? What about safety isolation. Are you aware that the output may carry dangerous voltages and touching anything of your circuit may be dangerous? Klaus

## In CAN bus is it possible to make a node bus off physically

Not sure if you understand the concept of dominant/recessive CAN bus state. A CAN node that is not transmitting is floating and does not load the bus. You can consider it physically off. If the question is referring to controller activity, just set it up to not responding.

## [Moved]: reducing stray voltage on pcb

Switch off means floating signal, unless the node is pulled down by some means. Any reason why not to expect arbitrary signals on the floating node? Jumping into details, we would ask for the type of observed signal (DC, noise, known interfering source)

## [Moved]: Colpitts Generator Pspice

Thank you! I added resistor and the floating node is gone. Howewer circuit still doesn't work like i expected. Please help In a Colpitt oscillator the crystal works as an inductor only. Hence, you should use a simple inductance of a suitable value - depending on the desired oscillation frequency, of course.

## PSpice Error subcircuit node is floating

Hello, I have a simple circuit to test a varicap model in PSpice. Inside the varicap model seems to be a floating node. Any ideas how to fix this? The circuit is this: 127835 The varicap model is this: .SUBCKT VARICAP 1 2 CTRL R1 1 3 1u VC 3 4 EC 4 2 Value = { (1/v(ctrl))*v(int) } GINT 0 INT Value = {

## Gate driver selection for Half Bridge application

The datasheet specifies that there should be a minimum 10 V difference between the gate drive supply and the floating supply voltage. No, it doesn't. You misunderstand the meaning of Vs. It's the floating ground of the high side driver, usually connected to the half bridge output node.

## [moved] Assigning a high impedance node in verilog-A

Hi, I am designing a hybrid content addressable memory (CAM) using cadence and I need to build a verilog-A block to switch modes. In the read mode, I need to pre-charge some nodes then make them floating. I tried different verilog-a lines but the code always fails. For example, I tried using the following line that I found while searching for a

## What is a floating diffusion(FD node) in image sensor pixel?

Is it possible to do the similar thing for InGaAs image sensor? I notice each InGaAs pixel is followed by a transimpedance amplifer. Can they do the CCD implementatation where they transfer charge from this pixel to next pixel? instead of using an amplifier for each pixel, for noise reduction reasons? and use floating diffusion as the output. Th

## Node Floating in Pspice simulation

Hi guys, this is my circuit. 113465 Error says node between two capacitor is floating.

Is it a handwritten SPICE netlist, what should we check it against? There should be a circuit schematic. At first sight I notice a nonglobal floating gate node in the vcocell subcircuit, so I believe at least this circuit part won't work.

## Convergence problem in transient bias point calculation

PSPICE like simulation programs don't like "floating points" and they frequenctly stop due to this error.There is a floating point in your circuit ( V_ of the OPAMP because of very high impedance ) and you'd better to connect a 1G Ohm or 100M Ohm ( for instance ) from this node to GND. You circuit might be unstable too, check the stability (...)

## How to eleminate floating point existence in AC-Coupled digital circuit

Hello there, I have designed a 3-input NAND gate by capacitor network connected to a NOT gate. this circuit functions well. recently i have found out that when inputs are stable and a noise occurs in node g, functionality of my circuit fails. this is because of node g which is floating point of my circuit. given that inputs are logical (...)

## How does this eeprom cell work?

The tunneling node will be driven to high positive or negative voltage to drive charge into the floating gate. However this schematic looks like it's missing something - there is no explicit return path for the tunneling current. I have seen other schemes where there is another electrode on the tunneling FET.

## How to understand charge sharing in charge pump of PLL?

if there is not a unit gain opamp, voltage of node N1 and N2 would not change too much , so charge sharing is not terrible. N1 and N2 are floating up to the supply rails minus current source saturation voltage, the parasitic charge transferred to the loop capacitor might be "terrible" enough, CS saturation possibly causes addition

## Pspice model ad976 pin dgnd is missing

If DGND isn't used in the schematic model (did you create it yourself?) why do you have a DGND pin? The pin properties can be set to ignore floating state, however. If you are using mixed signal simulation in the model, there may be still an internal DGND node, but it would be connected to the global DGND, I think.

## PSPICE error - floating node

I am beginner of PSPICE. I am designing a clipper circuit in capture as given in a user guide manual. But errors are occurring that node is floating. I am attaching screenshot of schematic here(this forum does't allow attaching schematic file). Please help. After running bias point analysis, PSPICE output file shows - ** Creating

## Allegro Design Entry CIS - floating node problem

Hello, I am currently using Allegro Design Entry CIS, and I'm rather new to it. I built a double pulse test circuit but I am having trouble simulating it. I created a new simulation profile and ran a transient analysis to 15us with a max step size of 10ns. Upon simulating the circuit (and I'm not expecting correct results the first time),

## 3rd order bandpass filter simulation on Cadence 16.5

I think any node that has no resistive path to ground will give the "floating nodes" error. Just connect a very large resistor from each of those nodes to ground (large enough to have no effect on the AC filter response).

## How to find a floating node in the schematic

Hi all, How to find a floating node in the schematic where manual check is not feasible?. And also how to find the short path from VDD to VSS in the circuit?. We have tristate inverter, inwhich it has 3 states-0,1 and High impedence. Where this type of circuit is used? And whether tristate inverter output is fed to any gate? Thank

## Nmos transistor floating source node

For an nmos transistor if Vdd=5v, Vin is connected to nmos transistor gate, vdd is connected to the drain and source is left floating (node V01)tell me what are Vo1 when Vin is 5V, 3V, 2.5V and 0V.

## Floating nodes in PSPICE even with ground connected

Hello all! I am working on my project called 'waveform selector'. I am trying to run a simulation of my circuit in PSPICE. I have constructed the circuit in PSPICE schematics (please see attached) and I still find that there are floating nodes though I have connected the AGND (analog ground) component to my circuit. Kindly enlighten me on this is

## Need Help (Switch using mosfet problem)

Which circuit element is intended to cause Vgs3 drop to 0? The node is just floating with M2 off.

## VHDL error:port has no source

Hello all, I've correctly synthesized blocks. Then I'm using structural description to build the complete component. I'm sure the connections are correct and that there're no floating i/p ports, but I get the following error during synthesis: Xst:1706 - Unit : port <7>> of logic node <7>_inv> has

## Floating voltage measurements with oscilloscopes?..ok with floating power source?

Oscilloscopes that have their chassis connected to ground cannot be used to observe "floating" voltages; in principle, "floating" means that one or another point of the measured voltage source has a voltage above ground. The only good option is to use a battery-operated oscilloscope, or, an isolation transformer in AC power line. The transformer

## Error in cdesigner: internal timestep too small in transient analysis

Your problem is most likely a floating node. It is not easy to see without a schematic. As you seem to have several transmission gates, that could be the problem. Try adding some very high value resistors from various nodes to ground around the transmission gates and see if that helps. 1G ohm should do. Keith ----------

## What is the necessity of having a low impedence path in logical circuits

I would insist on the requirement, that a net representing logic states by voltage levels must not be floating. It can have a low impedance termination at the sender, at the receiver, or possibly at both sides. For low power operation, only source side termination comes in to consideration.

## Setup license file for hospice 2010.12

Hi, Heard from web that newer hospice will require Synopsys Common Licensing even I do not need floating node. No longer take fixed license file. Is this real?

## What is BI-CONNECT option in Calibre LVS rule deck?

I read this long time ago. What I can recall is,This is floating node in SOI process. Where you can use this to control Vth of device. here you tap a dummy device to P-Well.

## floating node error for my circuit

62936 for the circuit attached above am getting the below error this is my first circuit please help me to simulate Pspice files using OrCAD 10.0 **** INCLUDING **** * source DEMO4 R_R1 N00167 N00174 1k R_R2 N00174 GND 1k V_V2 N00167 GND +SIN 0 2V 10k 0 0 0 *

## The Current ouptut 150 Amps power supply problem

I have difficulties to identify the probe connection for each waveform. It's also not clear to me, how you can connect the oscilloscope ground to a "hot" circuit node (switcher output) without affecting the measurement. Does it mean, the circuit is completely floating or do you use a differential probe?

## Help wanted - PSpice simulation from Allegro HDL schematic

I am trying to simulate a schematic in Allegro design entry HDL 16.3 using the built in PSpice, drop down menu called "AMS Simulator". My schematic is just a dummy with only 2 resistors, a GND node, and a floating node (no symbols for a voltage source yet I know we have a long way to go but I just want to get the tools working). Here (...)

## Gate driver IR2106-Convergence problem Orcad 16.2 Pspice

i solved this a long time ago.. by memory, i believe it had something to do with the model file's ground reference. it uses node '0' as the ground which is SYSTEM ground. you have to change this to some variable name (i used "ref") and then apply your floating power supply's reference to this pin.

## why do 3 winding mutual inductors get unstable

Cadence doesn't like floating nodes... That's why connect a 1GOhm to each node and try to set the initial node voltages as 0 or 1 V etc..

## What is the Voltage at Floating node ??

Dear All, I have some question about floating node. As the following picture, If I set V1 to be Vdd all the time. and V2 is Vdd at the first period, then set V2 is 0 (Which is close NMOS) My question is, what is the value of the voltage at node C ? and if V2 is zero, the other transistor, which node C is gate (...)

## Sample and Hold Circuit, cant get the same waveform!

When the switch is OFF the gate of the FET is floating. Yes. Gate bias of a JFET is a bit more complicated than of a MOSFET. You would connect a voltage divider (equal resistors) from U1A and U1B output to the gate to set the FET on state voltage and apply negative supply voltage V- to the gate to switch it off.

## ERROR -- Node N02018 is floating

**** INCLUDING **** * source ADA C_C10 N02018 0 470u R_R22 N00835 N00956 5 V_V1 N00517 N00698 12Vdc C_C9 N00956 N00698 100n R_R24 N00698 0 1M C_C3 N00795 0 100n C_C4 N02018 0 100n R_R16 N00795 N00517 1M C_C8 N02018 0 100n R_

## floating node error in simulation

**** INCLUDING voltdiv-SCHEMATIC1.als **** .ALIASES R_R1 R1(1=N00021 2=N00009 ) R_R2 R2(1=GND_POWER 2=N00021 ) V_V1 V1(+=N00009 -=GND_POWER ) _ _(GND_POWER=GND_POWER) _ _(GND_POWER=GND_POWER) .ENDALIASES **** RESUMING voltdiv-SCHEMATIC1-volt.sim.cir **** .END ERROR -- node N00021 is floating ERR

## What happens when capacitor one side is floating?

I wanted to know what happens when a square wave is applied at one side of capacitor and the other end is open? In cadence simulation....the output is same as the input. But what happens in theory? And why does it happen like that? This is a very good question. Suppose you apply voltage signal V to the left node/

## Help~~~~~~PSPICE:ERROR -- Node N00028 is floating ERROR

Hi there: I am a starter of Pspice, and I am running a simulation by pspice, but it keeps popping up error message. I 've tried to connect a ground in the circuit, and place a huge resistor between the circuit and the ground, but it didn't help. Could any 1 check it out and see what's wrong here? Any help will be so appreciated!! Kind regar

## floating node error in pspice

hi. I have problem in my circuit. I drew my circuit in pspice but it do not work and has error please help. ERROR -- node N00868 is floating ERROR -- node N00151 is floating ERROR -- node N000030 is floating ERROR -- node N00023 is floating.....

## Floating node error while trying to simulate PSPICE model

Hey guys i am totally stuck at this problem. I downloaded the .subs file for LT1763- Fixed 3.3V LDO regulator and created a schematic symbol for it, then attached the model to the part, included it in schematic and was trying to simulate the basic circuit as shown in datasheet. Now as per datasheet you need to have a capacitor between the BY

## finding resistance at a node in cadence

I made a feature request to Cadence and Dolphin Integration in 1999 for Net Capacitance and Conductance detection. That where mainly for floating node detection and to have a summary of the total capacitance and conductance. That is useful also for analog performance estimation. This information is natural for modified nodal analysis and could b

## The effect of the ref node of the s2p data item in ADS

The ref node represents the ground reference of your circuit. If it is not connected to the ground,it means the ground of your circuit is floating.

## Any fast method to checking floating node?

Hi Folk, Does C@dence provide any simulation method to check floating node of my circuit? Could you tell me how could I do it? Thanks wccheng

## Buck converter using the UC3843 driving a N-Chanel Mosfet

As FvM mentionned, you need a level shifting circuit between this driver and your MOSFET. You can do it using a transformer, this will help you to get a floating node voltage to the MOSFET gate. A transformer 1:1 turns ratio is usually sufficient.

## Questions about inverting opamp configuration

Would you kindly upload the schematic of the op-amp itself so that we can check it. One thing is that the signal's input is connected only to capacitors, implying that this node is floating and doesn't have a specific dc value (unless it's internally biased inside the op-amp). You shouldn't leave that node floating; (...)

## 3-phase PWM Inverter with variable voltage frequency

ha.. you have a difficult project ahead of you. which version of PSpice are you using? the hard part will be how to deal with the floating grounds of your system. each "upper" switch in your bridge has its reference to the center node between teh 2 switches. you know what i mean? each switch needs a gate driver. each gate driver has

## Floating node identification method==> hsim method

Hsim would give out a file as hsim.conn, where those floating nets would be listed

## how to print node capacitor in spectre?

I had done a function request to Smash some years ago to implement the printing of node capacitance and node impedance. These infos are side effects of the modified nodal analysis but still not used in simulators. I need it some years ago for detection of floating nodes in analog circuit. I know that for digital TL there (...)

## High Impedance in Verilog-A

Hi everyone I was wondering if there was a way to model a floating node in verilog-a. I was actually working on a simple model for a switch (including its on-resistance). What is wish to do is to 'float' the output node when the switch is off... Cheers Nihit