Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1996-11-13
1998-10-13
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330292, H03F 345, H03F 114
Patent
active
058218122
ABSTRACT:
In a wideband amplifier whose bandwidth is increased using a parallel feedback transistors(PFT), capacitive elements are connected between the first and seventh nodes which are emitters of the seventh and eighth transistors which are parallel feedback transistors, and alternating current(AC) grounds, wherein outputs are supplied from the first and seventh nodes, and the emitter follower buffers are coupled to the first and seventh nodes so that a negative feedback current is leaked through the collector parasitic capacitances of emitter follower buffer transistors. The bandwidth of the amplifier is greatly increased without making the circuit complex.
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9GHz Bandwidth, 8-20dB Controllable-Gain Monolithic Amplifier Using ALGaAs/GaAs HBT Technology; C.J. Pinzone, N.D. Gerrard, R.D. Dupuis, N.T. Ha, H.S. Luftman; 1989; pp. 1317-1318.
Ki Hyeon-Cheol
Lee Tae-woo
Park Moon-Pyung
Park Sung-Ho
Song Kie-Moon
Electronics and Telecommunications Research Institute
Korea Telecommunication Authority
Mottola Steven
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