Synthesis of Clock Trees for Sampled-Data Analog IC Blocks
It is obvious that automated design of clock (buffer-cell) network of SDACs would eliminate the possibility of error, reduce
development time, and allow analog IC design engineers to focus their attention on parts of the design that need creativity.
The claim of our project is that we are indeed able to automate the design of SDAC clock distribution circuits by writing
an extra software layer that runs on top of (digital) CTS software. The deliverables of our project were a methodology and
a software. The methodology deliverable is also useful in the case of manual design. Software deliverable of the project
(called ACTreS for Analog Clock Tree Synthesis), on the other hand, synthesizes the circuit as well as the layout of clock
distribution network. ACTreS does so by driving an already existing CTS software (in multiple runs) with constraint files it
automatically generates.
We successfully validated our methodology and ACTreS software for the design of a 10-bit 0.18 micron 60 MHz 2-step Flash
differential-input ADC circuit as a test case.
Yrd. Doç. Dr.
Hasan Fatih Uğurdağ
DEPARTMENT
Electrical & Electronics
Engineering
CONTACT
[email protected]
FUNDING SCHEME
TÜBİTAK 1001
START DATE
01.10.2010
DURATION
24 months
2010 National Grants
This project aimed to develop a methodology for automated design of clock trees in Sampled-Data Analog Circuits (SDACs).
The current practice in the industry and academia for clock tree design of SDACs is a manual process, which is timeconsuming and error-prone. Clock tree design in digital domain, however, is fully automated and is carried out by what
we call Clock Tree Synthesis (CTS) software. In spite of some critical differences, SDAC clock tree design problem has
fundamental similarities with its digital counterpart. Therefore, this work started with the question of “Why don’t we use CTS
software for analog circuits while we are able to utilize them successfully for digital?”
Electrical & Electronics Engineering
ABSTRACT
OZU BUDGET
147,187.00 TL
13