Patent ID: 6714086
Filing Date: 2004-03-30
Classification: H03B

Abstract:
A symmetrical oscillator, comprising:a first active component having a drive terminal and first and second gain terminals, one of the first and second gain terminals of the first active component being coupled to a first reference node; a second active component having a drive terminal and first and second gain terminals, one of the first and second gain terminals of the second active component being coupled to the first reference node; a reactive element coupled between the drive terminals of the first and second active components, the reactive element including a first inductor coupled between first and second terminals, and being coupled to the first and second active components by way of first and second capacitors formed from at least one of varactor diodes and microelectromechanical systems, each having one end connected to a respective one of the first and second terminals and another end coupled to a respective one of the drive terminals of the first and second active components, the reactive element at least partially defining a fundamental resonant frequency; a first feedback circuit having at least one reactive component coupled between the other of the first and second gain terminals of the first active component and a common node; and a second feedback circuit having at least one reactive component coupled between the other of the first and second gain terminals of the second active component and the common node, wherein an output signal is taken from at least one of the reactive element, the common node, and the first reference node.