Title :
Digitally controlled oscillator
Author :
Giebel, Burkhard ; Lutz, Jürgen ; Leary, Paul L O
Author_Institution :
Intermetall, Halbleiterwerk der Deutsche ITT Ind., GmbH, Freiburg, West Germany
fDate :
6/1/1989 12:00:00 AM
Abstract :
A monolithic integrated digitally controlled oscillator circuit is discussed. The oscillator has an output frequency range from 19.07 Hz to more than 20 MHz with a resolution of 19.07 Hz. It is fully linear over the complete control range with respect to the digital control word, has the long-term stability of a quartz oscillator, and the output clock edge uncertainty has a standard deviation of less than 0.5 ns. The circuit requires only a reference quartz as an external component. It operates from a single 5-V power supply, is fabricated in a 1.5-μm double-metal single-poly standard CMOS process, and requires an area of 4.1 mm2
Keywords :
CMOS integrated circuits; digital control; frequency stability; linear integrated circuits; radiofrequency oscillators; variable-frequency oscillators; 1.5 micron; 19.07 Hz to 20 MHz; 5 V; PLL; VFO; clock generators; digitally controlled oscillator; double-metal single-poly; external quartz-reference; frequency synthesizer; long-term stability; monolithic IC; phase locked loop; single 5-V power supply; standard CMOS process; CMOS process; Circuits; Clocks; Digital TV; Digital control; Digital-controlled oscillators; Frequency; Phase locked loops; Stability; Uncertainty;
Journal_Title :
Solid-State Circuits, IEEE Journal of
