Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Reexamination Certificate
2008-07-15
2008-07-15
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
C330S302000, C330S258000, C330S311000
Reexamination Certificate
active
07400196
ABSTRACT:
A wide band amplifier includes a core amplifier having input terminals and output terminals for, respectively, receiving differential input signals and providing amplified differential output signals. A bandwidth peaking network is coupled to the core amplifier and includes (a) a first coil and a first resistor connected in series and (b) a second coil and a second resistor connected in series. The first coil and resistor and the second coil and resistor, respectively, are coupled to the core amplifier for receiving the amplified differential output signals. The bandwidth peaking network is configured to increase the frequency bandwidth of the amplifier. The bandwidth peaking network includes (a) a first node formed between the first coil and resistor, (b) a second node formed between the second coil and resistor, and (c) a third resistor is connected between the first node and the second node. This resistor is free of current flow at low frequency operation of the amplifier.
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Chris D. Holdenried et al., “Analysis and Design of HBT Cherry-Hooper Amplifiers With Emitter-Follower Feedback for Optical Communications”, IEEE vol. 39, No. 11, Nov. 2004, pp. 1959-1967.
Adrian Maxim, “A 3.3V 10Gb/s SiGe Limiting Transimpedance Amplifier Using a Pseudo-Differential Input and a Limiting Cherry-Hooper Stage”, IEEE, 2005.
ITT Manufacturing Enterprises Inc.
Nguyen Patricia
RatnerPrestia
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