Title :
A direct digital synthesizer with 100-MHz output capability
Author :
Saul, P.H. ; Mudd, M.S.J.
Author_Institution :
Allen Clark Res. Centre, Plessey Res. Caswell Ltd., Towcester, UK
fDate :
6/1/1988 12:00:00 AM
Abstract :
A bipolar direct digital synthesizer with 5-kHz to 100-MHz output capability is described. Channel spacing is 5 kHz with a ´hop´ time between discrete output frequencies of less than 17 ns. Spurious output rejection is better than -32 dBc, and close-to-carrier measurements indicate a noise floor lower than -138 dBc at +or-25 kHz.<>
Keywords :
bipolar integrated circuits; digital integrated circuits; digital-analogue conversion; frequency synthesizers; 5 kHz to 100 MHz; DAC; ROM lookup table; bipolar IC; direct digital synthesizer; Channel spacing; Circuit noise; Clocks; Data conversion; Frequency; Noise measurement; Phase locked loops; Phase noise; Read only memory; Synthesizers;
Journal_Title :
Solid-State Circuits, IEEE Journal of
