VLSI based asynchronous Receiver and Transmitter

The aim of this project is to design and implement an asynchronous receiver,
transmitter using verilog hardware description language. In this project we have
used serial mode of transmission because in parallel mode of transmission we need
‘n’ number of cable to transmit “n” bits of data. The following features mainly
distinguishes our project from other similar devices
- full duplex operation
- standard data format
- even or odd parity
- parity error check
- over run error check
- receiver data ready
- transmitter data ready
VLSI design Based Three phase power Inverter Gating
A three phase inverter is a common unit found in industrial drives meant for
control of induction motors. Convention gating circuit meant for gating of inverters
has the following problems.
1. Circuit Delays. Large complicated circuits running at very high frequencies
have one big problem to tackle - the problem of delays in propagation of signals
through gates and wires ... even for areas a few micrometers across! The
operation speed is so large that as the delays add up, they can actually become
comparable to the clock speeds.
2. Power. Another effect of high operation frequencies is increased consumption of
power. This has two-fold effect - devices consume batteries faster, and heat
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dissipation increases. Coupled with the fact that surface areas have decreased,
heat poses a major threat to the stability of the circuit itself.
3. Layout. Laying out the circuit components is task common to all branches of
electronics. What's so special in our case is that there are many possible ways
to do this; there can be multiple layers of different materials on the same
silicon, there can be different arrangements of the smaller parts for the same
component and so on.
This project demonstrates the use of a VLSI kit for the gating of three phase
inverter in different modes.
ADVANTAGES OVER ANALOG SYSTEMS
· No temperature drift of tuning parameters
· Component count dramatically reduced resulting in higher Mean Time Between
Failure (MTBF)
· Enclosure density and size dramatically reduced.
· Fewer wiring connections.
· All tuning and adjustments are made in software thus hardware adjustments
which are error prone and not easily reversible are not required



VLSI design Based Three phase power converter Gating
A three phase converter is a common unit found in industrial drives meant for
control of motors. Convention gating circuit meant for gating of converters has the
following problems.
2. Circuit Delays. Large complicated circuits running at very high frequencies
have one big problem to tackle - the problem of delays in propagation of signals
through gates and wires ... even for areas a few micrometers across! The
operation speed is so large that as the delays add up, they can actually become
comparable to the clock speeds.
3. Power. Another effect of high operation frequencies is increased consumption of
power. This has two-fold effect - devices consume batteries faster, and heat
dissipation increases. Coupled with the fact that surface areas have decreased,
heat poses a major threat to the stability of the circuit itself.
4. Layout. Laying out the circuit components is task common to all branches of
electronics. What's so special in our case is that there are many possible ways
to do this; there can be multiple layers of different materials on the same

silicon, there can be different arrangements of the smaller parts for the same
component and so on.
ADVANTAGES OVER ANALOG SYSTEMS
· No temperature drift of tuning parameters
· Component count dramatically reduced resulting in higher Mean Time Between
Failure (MTBF)
· Enclosure density and size dramatically reduced.
· Fewer wiring connections.
· All tuning and adjustments are made in software thus hardware adjustments
which are error prone and not easily reversible are not required