Kw. Kobayashi et al., INTEGRATED COMPLEMENTARY HBT MICROWAVE PUSH-PULL AND DARLINGTON AMPLIFIERS WITH P-N-P ACTIVE LOADS, IEEE journal of solid-state circuits, 28(10), 1993, pp. 1011-1017
We report the first microwave results of complementary heterojunction
bipolar transistor (HBT) amplifiers which integrate both n-p-n and p-n
-p devices on the same chip using selective molecular beam epitaxy (MB
E). An HBT wideband amplifier utilizing the Darlington configuration a
nd implementing a p-n-p active load has a gain of 7.5 dB and a bandwid
th from dc to 2.5 GHz. A complementary push-pull amplifier has a satur
ated output power of 7.5 dBm at 2.5 GHz.