Patent ID: 6265908
Filing Date: 2001-07-24
Classification: H03F,H03K

Abstract:
A balun circuit, comprising:a set of a first load element, a first device and a second device connected in series in that order between a supply voltage source and the ground;a set of second load element, a third device and a fourth device connected in series in that order between the supply voltage source and the ground, wherein each of the first to fourth devices has a control electrode and a first and a second electrodes, first electrodes of the first and the third devices being connected to second electrodes of the second and the fourth devices, respectively;a bias voltage source connected to control electrodes of the first and the third devices;a bias current source connected to control electrodes of the second and the fourth devices;a first capacitor;an input voltage source coupled to the second electrode of the second device via the first capacitor; anda second capacitor coupled between the control electrode and the second electrode of the second device.