Patent ID: 7042272
Filing Date: 2006-05-09
Classification: H03F

Abstract:
1. A transconductance amplifier comprising: a first transistor having a first current electrode for receiving an input voltage, a control electrode coupled to said first current electrode, and a second current electrode coupled to a power supply voltage terminal; a second transistor having a first current electrode, a control electrode coupled to said first current electrode of said first transistor, and a second current electrode coupled to said power supply voltage terminal; a third transistor having a first current electrode for providing a negative current of a differential current pair, a control electrode for receiving a bias voltage, and a second current electrode coupled to said first current electrode of said first transistor; and a fourth transistor having a first current electrode for providing a positive current of said differential current pair, a control electrode for receiving said bias voltage, and a second current electrode coupled to said first current electrode of said second transistor, wherein said first, second, third and fourth transistors are characterized as operating in saturation and strong inversion.