SP 23.6: A 1.8GHz CMOS Voltage-Controlled Oscillator
نویسنده
چکیده
This paper describes the factors that limit the tuning range of monolithic LC voltage-controlled oscillators (VCOs), especially at low supply voltages, and introduces circuit techniques that alleviate this problem. Incorporating such techniques, a 1.8GHz CMOS oscillator achieves a tuning range of 120MHz with a relatively constant gain while exhibiting a phase noise of -100dBc/Hz at 500kHz offset. The actual implementation is a quadrature generator consisting of two coupled oscillators [1]. Since the two oscillators are identical, only one is considered here.
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