Patent ID: 8143960
Filing Date: 2012-03-27
Classification: H03B

Abstract:
1. A voltage controlled oscillator configured to operate in low and high band modes, said voltage controlled oscillator comprising: a low band section and a high band section; a multi-tap inductor having a high inductance portion coupled to said low band section and a low inductance portion coupled to said high band portion; a low band bias circuit coupled to said low band section and a high band bias circuit coupled to said high band section, said low band bias circuit disabled in said high band mode and said high band bias circuit disabled in said low band mode; said low band section being configured to provide a low frequency band oscillator output in said low band mode and said high band section being configured to provide a high frequency band oscillator output in said high band mode; wherein said low band section includes a low band fine tuning circuit and said high band section includes a high band fine tuning circuit, said low band fine tuning circuit and said high band fine tuning circuit both controlled by a common control signal; and wherein said low band section includes a low band coarse tuning circuit and said high band section includes a high band coarse tuning circuit, said low band coarse tuning circuit disabled in said high band mode and said high band coarse tuning circuit disabled in said low band mode.