A 1 GHZ SAMPLE RATE, 100-CHANNEL, 2-BIT, SINGLE-CHIP, CMOS DIGITAL CORRELATOR SPECTROMETER

THE CORRELATOR CHIP IS INTENDED FOR THE TWO MAIN APPLICATION AREAS IN RADIO ASTRONOMY: CROSS-CORRELATION SPECTROSCOPY IN APERTURE SYNTHESIS ARRAYS, AND AUTOCORRELATION SPECTROSCOPY AT CM AND MM WAVELENGTHS. THE OBJECTIVES OF THE RESEARCH ARE TO DESIGN, SIMULATE, AND LAYOUT A CMOS DIGITAL CORRELATOR CHIP WITH THE FOLLOWING CHARACTERISTICS: (1) GHZ SAMPLE RATE, (2) 10 CHANNELS, (3) 2-BIT (FOUR-LEVEL) QUANTIZATION, AND (4) 32-BIT COUNTER/ACCUMULATOR. THE 1 GHZ SAMPLING RATE CAN BE ACHIEVED WITH A COMBINATION OF SYSTOLIC ARCHITECTURE, NOVEL PIPELINE DIFFERENTIAL LOGIC CIRCUITS, AND A 1.0 UM CMOS FABRICATION PROCESS.