A 32 point monolithic FFT processor chip

The Discrete Fourier Transform (DFT) is used in a wide variety of digital signal processing applications. The algorithms used to implement this transform require intensive arithmetic computation as well as complex control and sequence functions. The designer of VLSI components is faced with the problem of identifying requirements and architectures for chips which directly support the DFT. Design goals of these chips include minimum chip count to implement an entire transform, very high speed and low power dissipation. This paper discusses a monolithic CMOS device that was fabricated to perform 32 point Fast Fourier Transforms at very high data rates. All data memory and arithmetic and control circuitry is contained on this single low power chip.