cmos inverter

[jason]

Hello All

Anyone know where can we find the delay time of a single cmos
inverter(buffer) for technology ranging from 0.7um, 0.5um, 0.3um to
0.18um? Sort of like benchmarking?
In fact, I only need to know about the delay time for 0.5um technology.
Kindly let me know.

Also if there is a way to calculate, please share with me about it. If
some parameters for each technology are needed, please let me know how
to we get the parameters for each technology(from model files)?

If it is from model files, many of them are shown in symbols and the
exact name of the symbol are not know, any site that introduce each of
the parameters in details?

Kindly help
Thank you

jason

 

[Jim Thompson]

On 10 Aug 2005 06:46:07 -0700, "jason" <cheanglong@gmail.com> wrote:

Hello All

Anyone know where can we find the delay time of a single cmos
inverter(buffer) for technology ranging from 0.7um, 0.5um, 0.3um to
0.18um? Sort of like benchmarking?
In fact, I only need to know about the delay time for 0.5um technology.
Kindly let me know.

Also if there is a way to calculate, please share with me about it. If
some parameters for each technology are needed, please let me know how
to we get the parameters for each technology(from model files)?

The way I qualify a CMOS process is by simulating a ring oscillator,
any odd number of inverter stages, but the longer the better for
accuracy. Then you can easily measure the delay thru one stage loaded
by a similarly sized device.

If it is from model files, many of them are shown in symbols and the
exact name of the symbol are not know, any site that introduce each of
the parameters in details?

Kindly help
Thank you

jason

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

[Don Lancaster]

jason wrote:

Hello All

Anyone know where can we find the delay time of a single cmos
inverter(buffer) for technology ranging from 0.7um, 0.5um, 0.3um to
0.18um? Sort of like benchmarking?
In fact, I only need to know about the delay time for 0.5um technology.
Kindly let me know.

Also if there is a way to calculate, please share with me about it. If
some parameters for each technology are needed, please let me know how
to we get the parameters for each technology(from model files)?

If it is from model files, many of them are shown in symbols and the
exact name of the symbol are not know, any site that introduce each of
the parameters in details?

Kindly help
Thank you

jason

Note that there are two types of CMOS inverters: single stage ones and

triple stage ones. Their uses and behavior are wildly different.

--
Many thanks,

Don Lancaster
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
voice: (928)428-4073 email: don@tinaja.com

Please visit my GURU's LAIR web site at http://www.tinaja.com

 

[jason]

Thank you Jim and Don

Any good online material you can recommend for this ring osc
simulation?
I need a single stage cmos inverter.
I will find out at the mean time too.
Please share with me your opinion
Thank you all


jason

 

[Jim Thompson]

On 10 Aug 2005 09:52:56 -0700, "jason" <cheanglong@gmail.com> wrote:

Thank you Jim and Don

Any good online material you can recommend for this ring osc
simulation?
I need a single stage cmos inverter.
I will find out at the mean time too.
Please share with me your opinion
Thank you all


jason

Start with a minimum size device for the NMOS. See the process specs
for this size.

Then size the PMOS width until the threshold is exactly at VDD/2.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.