Title :
A monolithic digital chirp synthesizer chip with I and Q channels
Author :
Van Andrews, G. ; Chang, C.T.M. ; Cayo, J.D. ; Sabin, S. ; White, W.A. ; Harris, M.P.
Author_Institution :
Texas Instruments Inc., Dallas, TX, USA
Abstract :
A monolithic digital chirp synthesizer (DCS) chip has been developed using GaAs-AlGaAs HI/sup 2/L technology. The 6500 HBT gate DCs chirp is capable of producing linear frequency-modulated (chirp) waveforms or single frequency waveforms. The major components of the DCS are two 28-bit pipelined accumulators, a 1.8 kbit sine ROM, a 1.8 kbit cosine ROM, and two 8-bit digital-to-analog converters (DACs). The total chip area is 4.877 mm*6.172 mm using a minimum feature size of 1.5 microns. All components of the DCS are functional and the device has been clocked at 450 MHz.<>
Keywords :
III-V semiconductors; aluminium compounds; bipolar integrated circuits; digital signal processing chips; frequency synthesizers; gallium arsenide; heterojunction bipolar transistors; integrated injection logic; military equipment; telecommunications computing; 1.5 micron; 1.8 kbit; 450 MHz; DACs; DSP; GaAs-AlGaAs; HBT; HI/sup 2/L technology; I channel; Q channel; cosine ROM; digital chirp synthesizer chip; heterojunction I/sup 2/L; linear FM waveforms; pipelined accumulators; sine ROM; single frequency waveforms; Chirp; Clocks; Distributed control; Frequency; Gallium arsenide; Heterojunction bipolar transistors; Instruments; Read only memory; Signal generators; Synthesizers;
Conference_Titel :
Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 1991. Technical Digest 1991., 13th Annual
Conference_Location :
Monterey, CA, USA
Print_ISBN :
0-7803-0196-X
DOI :
10.1109/GAAS.1991.172623
