Title :
A compact direct digital frequency synthesis architecture
Author :
McEwan, Alistair ; Collins, Steve
Author_Institution :
Univ. Coll. London
Abstract :
A novel ROM-less technique is introduced here that uses the nonlinear response of a current cell consisting of an ideal current source and differential current switch. The result is compact architecture that is 100% efficient as all the bias current is used to form the output. The only additional component is a small linear phase DAC. A system with a nonlinear DAC of four current cells achieved an SFDR of -40dBc up to output frequencies of 1 MHz and consumed only 5 muW/MHz
Keywords :
digital-analogue conversion; direct digital synthesis; integrated circuit design; 1 MHz; ROM-less technique; current cell; differential current switch; digital-to-analog converter; direct digital frequency synthesis; ideal current source; linear phase DAC; nonlinear response; Circuits; Educational institutions; Energy consumption; Frequency synthesizers; Instruction sets; Read only memory; Switches; Threshold voltage; Transconductance; Virtual manufacturing;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693004
