Patent ID: 7218899

Claim:
An apparatus for up-converting an electromagnetic signal, comprising: a first and second amplifier each having a first, second and third port; a switching device having a first, second and third port; a first and second capacitor each having a first and second port; and a first and second impedance device each having a first and second port, wherein the second port of the first and second amplifier are electrically coupled together, the third port of the first amplifier is electrically coupled to the first port of the first impedance device, the third port of the second amplifier is electrically coupled to the first port of the second impedance device, the first port of the switching device, the second port of the first impedance device and the first port of the first capacitor are electrically coupled together, and the second port of the switching device, the second port of the second impedance device and the first port of the second capacitor are electrically coupled together, and wherein a switching signal is applied to the third port of the switching device.