Patent ID: 8624657
Filing Date: 2014-01-07
Classification: G06G,H04B

Abstract:
1. A squaring circuit comprising a first differential input port and a second differential input port for receiving a differential input signal and a first differential output port and a second differential output port for outputting a differential output signal, wherein the squaring circuit comprises: a first set of current mode triplet metal oxide semiconductor (MOS) devices comprising a first MOS device, a second MOS device and a third MOS device, each of the first MOS device, second MOS device and third MOS device having a source operably coupled to a first current source, wherein the drain of the first MOS device is operably coupled to a first supply, the drain of the second MOS device is operably coupled to the first differential output port and a drain of the third MOS device is operably coupled to the second differential output port; and a second set of current mode triplet metal oxide semiconductor (MOS) devices comprising a fourth MOS device, a fifth MOS device and a sixth MOS device, each of the fourth MOS device, fifth MOS device and sixth MOS device having a source operably coupled to a second current source, wherein the drain of the fourth MOS device is operably coupled to the first supply, the drain of the fifth MOS device is operably coupled to the first differential output port and a drain of the sixth MOS device is operably coupled to the second differential output port; wherein the gate of each of the first MOS device, second MOS device and sixth MOS device is connected to a first differential input port and the gate of each of the third MOS device, fourth MOS device and fifth MOS device is connected to a second differential input port such that the differential output current observed at the first differential output and second differential output is proportional to the differential input voltage squared.