Title :
Digital Controlled Oscillator
Author :
Giebel, Burkhard ; Lutz, Jürgen ; O´Leary, Paul
Author_Institution :
Intermetall, Halbleiterwerk der Deutsche ITT Industries GmbH, Hans-Bunte-StraÃ\x9fe 19, 7800 Freiburg, West Germany. Tel. (49)-761-517738
Abstract :
A monolithically integrated, digitally controlled oscillator is presented. It has an output frequency range from 18.9 Hz to ≫ 20 MHz, the long term stability of a quartz oscillator and a short term clock edge uncertainty with a standard deviation of 0.4 ns. The digital frequency control is fully linear with a resolution of 18.9 Hz. The only required external component is a reference quartz. The circuit operates from a single 5 V power supply and is fabricated in a 1.5 ¿m, double metal, single poly, CMOS process. The chip area is 4.1 mm2.
Keywords :
CMOS logic circuits; CMOS process; Circuit stability; Clocks; Digital circuits; Digital control; Digital-controlled oscillators; Frequency; Phase locked loops; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 1988. ESSCIRC '88. Fourteenth European
Conference_Location :
Manchester, UK
