Design and Simulation of Scalable Fast Parallel Counter

Abstract

In this research paper, we report an entirely different approach to design a scalable fast parallel counter with improved performance in terms of component and transistor counts. Subsequently the simulation tests are carried out for a wide range of input conditions to validate the design. The main advantages of this scalable counter include low power consumption in milliwatt (mw) range and have speed in the range of GHz. The proposed design is modular in nature indicating that it can easily be upgraded or applied for large counters easily. Repeated use of basic building blocks such as 3-bit synchronous parallel counter, simple D flip flop and 2bit synchronous parallel counter with enable signal made the design of counter simpler and modular. The logic uses early overflow states enabling all the blocks in the architecture concurrently at the system clock. The pipelined structures together with early overflow based logic provide correct functioning of all building blocks without ripple effects. The design is implemented using Microwind, Digital Schematics (DSCH) and 0.12 μm technologies. Performance shows a total power consumption of 0.164 mw with a clock speed of 1GHz. General Terms Low Power VLSI Design, Digital Electronics, Sequential Circuits, State Equations.