MONOLITHIC VOLTAGE-CONTROLLED oscillators (VCO) are widely used in analog IC design. Ah frequencies below about 500kHz these circuits display excellent characteristics, with temperature coefficients (TC) of frequency less than 100ppm/°C"2. However, at higher frequencies, most aspects of performance deteriorate rapidly, particularly the TC. In this paper. a highfrequency monolithic VCO fabccated using an f, = 1.3GHz 1: process that achieves 5 60ppm/ C TC of frequency over 0-75 C at center frequencies from dc t…
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