ISSN 1063-7397, Russian Microelectronics, 2007, Vol. 36, No. 5, pp. 299–304. © Pleiades Publishing, Ltd., 2007.
Original Russian Text © Yu.B. Rogatkin, 2007, published in Mikroelektronika, 2007, Vol. 36, No. 5, pp. 345–350.
One very signiﬁcant difﬁculty among others that the
developer of complex analog-to-digital systems faces is
the relatively long time of their modeling. This disad-
vantage is in full measure inherent to
(IP) blocks of digital-to-analog converters (DAC)
and analog-to-digital converters (ADP). In order to
avoid this problem at least at the initial stages of the
design route, it is advisable to use macromodels that
replace the functional blocks in the complex analog-to-
digital device. It is important that the macromodels
used reﬂect the main properties of the analog-to-digital
blocks and allow us to evaluate their main static and
The results of the use of an algorithmic macromodel
for an ADC of the pipelined type with the use of com-
mutated capacitors are presented below. Simulation of
devices of such kind requires using time analysis,
which is known to be one of the most expensive from
the viewpoint of processor time in calculations. As an
example, a 6-digit ADC of the pipelined type is used.
This ADC involves the scheme of selection and storage
at the input, two series-switched cascades (2.5-bit and
1.5-bit), a 3-digit parallel ADP, and the scheme of dig-
ital correction. The structural scheme of the ADP is
given in Fig. 1.
The Algorithmic Model
of a Pipelined Analog-to-Digital Converter
Yu. B. Rogatkin
Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow, 125080 Russia
ZAO TsP Angstrem-SBIS
Received December 11, 2006
—The results of using an algorithmic macromodel of an analog-to-digital converter (ADC) of the
pipelined type during the development of intellectual-property blocks for analog-to-digital conversion are pre-
sented. The results of calculations are presented.
PACS numbers: 85.30.De
DEVICE AND CIRCUIT MODELING
Scheme of selection
= 2 3
Structural scheme of the 6-digit pipelined ADC.