Mediatek Corporation

Osama Shana'a

Fei Song

Yuen Hui Chee

A wideband highly-linear buffer circuit exhibiting a low output impedance comprises a first PFET (PFET), a second PFET (PFET), a first NFET (NFET), and a second NFET (NFET). Sources of PFETand PFETare coupled to VDD. PFET's drain is coupled to an output lead. PFETacts as a current source. NFET's drain is coupled to PFET's drain and to PFET's gate. NFET's source is coupled to the output lead. NFET's source is coupled to ground. NFET's drain is coupled to NFET's source and to the output lead. NFET's gate is AC coupled to a first input lead. In a single-ended input example, NFET's gate is AC coupled NFET's drain. In a differential input example, NFET's gate is AC coupled to a second input lead. In another differential input example, PFETis not just a current source, but rather PFET's gate is AC coupled to the first input lead.

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Los Altos, CA, United States of America

Osama Shana'a