A small chip size 2 W, 62% efficient HBT MMIC for 3 V PCN applications. - Jan-Erik Müller; Peter Baureis; Otto Berger; Thomas Boettner; Nicola Bovolon; Rüdiger Schultheis; Gerhard Packeiser; Peter Zwicknagl (IEEE J. Solid State Circuits, 1998)