Title :
A low-power CMOS digitally synthesized 0-13 MHz agile sinewave generator
Author :
Chang, G. ; Rofougaran, A. ; Mong-Kai Ku ; Abidi, A.A. ; Samueli, H.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A low-power monolithic 1 /spl mu/m CMOS IC generates a 26 MHz-wide single-sideband, frequency-hopped spread-spectrum waveform for wireless transmission in the 902-928 MHz unlicensed ISM band. A direct digital frequency synthesizer (DDFS) on this IC produces 10b samples of sine and cosine waveforms whose frequency is selected with an 11b input word, followed by an on-chip 10b D/A converter (DAC) to convert the DDFS output into a sampled-data analog signal. Simplifications in architecture and circuits reduce dissipation of this 2.9/spl times/4.9 mm/sup 2/ IC to 40 mW at 40 MHz with 3 V supply.<>
Keywords :
CMOS integrated circuits; digital integrated circuits; digital-analogue conversion; frequency agility; frequency synthesizers; spread spectrum communication; 0 to 13 MHz; 26 MHz; 3 V; 40 MHz; 40 mW; 902 to 928 MHz; CMOS IC; CMOS digitally synthesized generator; DAC; agile sinewave generator; direct digital frequency synthesizer; frequency-hopped spread-spectrum waveform; low-power monolithic generator; onchip D/A converter; sampled-data analog signal; single-sideband waveform; unlicensed ISM band; wireless transmission; Analog integrated circuits; Analog-digital conversion; CMOS integrated circuits; Digital integrated circuits; Digital-to-frequency converters; Frequency conversion; Frequency synthesizers; Integrated circuit synthesis; Monolithic integrated circuits; Spread spectrum communication;
Conference_Titel :
Solid-State Circuits Conference, 1994. Digest of Technical Papers. 41st ISSCC., 1994 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-1844-7
DOI :
10.1109/ISSCC.1994.344740
