B.N. Ray, P. Pachoudhuri, P.K. Nandi (India), and
P. Ghosh (USA)
Operational Transconductance Amplifier,
Analog Design, Signal Flow Graph, Band Pass Filter.
Growing popularity of analog and mixed signal ICs and
the absence of a general synthesis methodology and
associated CAD tools for the realization of analog
functions has provided the impetus to explore innovative
analog design tools for CMOS VLSI implementation.
Operational Transconductance Amplifier (OTA), by being
an excellent active current mode device with wide band
capability, is a high potential candidate for the
development of integrated analog circuits. Its simple,
regular, modular, and programmable structure suits very
well with the VLSI implementation. We have developed a
general synthesis methodology and a CAD tool to
synthesize linear analog functions with a network of
OTAs. Our analysis indicates that the programmable
structure of the OTA network allows one to synthesize
different types of filters.
In this presentation we will discuss synthesis of band pass
filter along with a brief description of our design
methodology based on signal flow technique. This
technique provides an avenue to reduce the required chip
area, a very important factor, which needs to be
considered for the VLSI circuit development. In this talk
we will present our approach in synthesizing band pass
filter and the simulation results, which indicate that the
filter is capable of operating in the MHz range.
Discussion will also include the results of the
experimental verification of the simulated response of the
filter under consideration.