DocumentCode :
2449249
Title :
CMOS ring oscillator with quadrature outputs and 100 MHz to 3.5 GHz tuning range
Author :
Grözing, Markus ; Phillip, Bernd ; Berroth, Manfred
Author_Institution :
Inst. of Electr. Eng. & Opt. Commun. Eng., Stuttgart Univ., Germany
fYear :
2003
fDate :
16-18 Sept. 2003
Firstpage :
679
Lastpage :
682
Abstract :
A 100 MHz to 3.5 GHz four-stage CMOS ring oscillator with quadrature outputs and oscillator core current consumption roughly proportional to operating frequency is presented. A novel oscillator topology consisting of a chain of four static single-ended CMOS inverters, four additional feedforward inverters and frequency control by steering the total oscillator core current is proposed. The circuit is implemented in a 0.18/spl mu/ standard CMOS technology. Oscillator core current consumption is 90/spl mu/A at 100 MHz and 9mA at 3.5 GHz with a 1.8V supply. Measured phase noise at 4 MHz offset is -114dBc/Hz at 100MHz and -106dBc/Hz at 3.5GHz oscillation frequency. Quadrature error is better than 3.5/spl deg/ over the 100 MHz to 3GHz frequency range.
Keywords :
CMOS integrated circuits; circuit tuning; frequency control; integrated circuit design; oscillators; 1.8 V; 100 to 3.5E3 MHz; 4 MHz; 9 mA; 90 muA; CMOS ring oscillator; CMOS technology; feedforward inverters; frequency control; oscillator core current consumption; oscillator topology; quadrature outputs; single-ended CMOS inverters; tuning range; CMOS technology; Circuit topology; Frequency control; Frequency measurement; Inverters; Noise measurement; Phase measurement; Phase noise; Ring oscillators; Tuning;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European
Conference_Location :
Estoril, Portugal
Print_ISBN :
0-7803-7995-0
Type :
conf
DOI :
10.1109/ESSCIRC.2003.1257226
Filename :
1257226
Link To Document :
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