Patent ID: 8093957
Filing Date: 2012-01-10
Classification: H03B

Abstract:
1. An apparatus comprising: a voltage controlled oscillator (VCO) having an output (Q) and an inverted output (QB), a control voltage (VC), and a generally linear range of VC operation from VH to VL; a first bank of varactors coupled between said Q and said QB; a second bank varactors coupled between said Q and said QB; and a state machine having an input coupled to receive a first reference voltage equal to VH, said state machine having an input coupled to receive a second reference voltage equal to VL, said state machine having an input coupled to receive said VC, and said state machine having a plurality of outputs coupled to control said first bank of varactors and said second bank of varactors, and wherein said first bank of varactors and said second bank of varactors do not have a common connection point.