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14 Threads found on edaboard.com: Measure Capacitance Hspice

## hspice analysis problem

hi. How i can plot the output voltage curve represented by a variable resistance in transient Analysis with hspice? and my other question is that , Why, when I measure the capacitance value of vccap , its value is not shown? like this: .op .tran 2ns 1ms .probe Gcap 7 8 VCCAP PWL(1) 1 2 -1v, 0p 1v, 1p vi1 1 2 sin( 0 1 1k) .

## How do I measure the input capacitance of an Inverter?

Dear all, I want measure the input capacitance of an inverter for the vinput range of 0 to 3.3 V I am following the approach mentoined below: 1. at the input of the inverter I connect a dc voltage in series with a ac source. 2. then I am doing a parametric analysis (sweeping the dc value from 0 to 3.3 V) under which I am doing an ac analy

## How can i measure inverter input capacitance in Hspice simulation?

Hi everybody. Is there anyone how can guide me to measure input parasitic capacitance with hspice simulation? Thanks in advance. Alireza

## quastion about "hspice "

hi please say to me that how I can measure the capacitance in drain of an inverter in "hspice" simulation? thanks

## difference between capacitance in Hspice

Hi, everybody: What's the difference between capacitance parameter Cdg and Dgd in hspice? and how can i measure the capacitance between gate and ground(if bulk and sourse is connected) in hspice? THX!

## How to simulate pharse margin v.s Cload in Hspice

Dear All How can I use Hspcie to simulate phase margin v.s. load capacitance Y axis is phase margin X axis is load capacitance I use .measure to get phase margin but I can't plot it on spice explore. Could you give me some hspice code to do this simulation? Thank you Added after 1 minutes: jus

## Measure the output load capacitance using HSPICE

Dear All, does any one know how to use hspice to measure the output load capacitance of a circuit?

## How can I generate a C-V plot of Psub/Nwell diode using HSPICE?

There is something called LX3 or LX1 statement from which you can measure the capacitances across a diode. Please refer the hspice manual.

## is realy output of cap() function in hspice, capacitance?

is realy output of cap() function in hspice, capacitance? i need to measure capacitance between to nodes of circuit. do you have some idea?

## Hspice and capacitance

i want to measure capacitance of a circuit with hspice. do you have some idea?

## How to compute the power dissipation of i/o pad???

For simulation , you can use .measure command in hspice for calculating the power dissipation

## How to plot the graph of the effective capacitance in Hspice

you can measure the effective capacitance between 2 nodes, by the capacitance define.

## PFD delay for eliminating the charge pump dead zone

just measure the voltage on the capacitance and multiplied by C, that is the Q . you should add the .meas statemant in hspice list: .mear tran vcpo avg v(o) from=XXn to=XXn. .meas charge param='vcpo*C' where v(o) is the voltage on the capacitance . the plot is "charge stored in capacitor VS phase error" ,not (...)

## How to calculate the input capacitance of I/O cell in Hspice

to measure the input capacitance you may drive the port with a current. So, by measuring the time it takes the signal to go between two different voltages you can deduce the input capacitance. I=C . dV/dt You must be sure that the parasitic capacitance due to interconects is considered and explicitly present in the (...)