Patent ID: 8149066
Filing Date: 2012-04-03
Classification: H03B

Abstract:
1. A method of modeling a monolithic distributed VCO to operate at a given frequency of oscillation, the VCO model having a spacing topology defined by an input differential RF transmission line pair series-disposed so as to form a rectilinear spiral relative to an output differential RF transmission line pair spaced a predetermined (X) distance apart and defined by associated conductor widths and spacings W b , W c , S b , S c and connected at a common end thereof to a pair of MIM capacitors, and a plurality of differential amplifier cells distributed along the rectilinear spiral and separated a first distance l b apart relative to the length of the input differential RF transmission line and a second distance l c apart relative to the length of the output differential RF transmission line, the method comprising: selecting values for X, W identifying when the selected values cause the VCO model to oscillate at a desired frequency range.