Patent ID: 8400818
Filing Date: 2013-03-19
Classification: G11C,H03B

Abstract:
1. A voltage-controlled oscillator (VCO), comprising: an oscillating unit configured to output first and second output clock signals at first and second nodes, respectively, the first and second output clock signals having a frequency that is variable in response to a control voltage; an active element unit connected to the oscillating unit, the active element unit being configured to maintain oscillation of the oscillating unit; a bias current generating unit connected to the active element unit at a bias node, the bias current generating unit providing a bias current to the bias node and being adapted to adjust the bias current in response to a control code; and first and second capacitor blocks connected to the oscillating unit and the active element unit, the first and second capacitor blocks providing first and second load capacitances, respectively, to the first and second nodes, respectively, in response to the control code.