Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Reexamination Certificate
2006-11-03
2008-08-26
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
C330S289000
Reexamination Certificate
active
07417507
ABSTRACT:
A combined bias circuit in which a voltage drive bias circuit and a current drive bias circuit are provided in parallel with each other has a configuration in which a linearizer including a first resistor is connected between an amplifying transistor and a second resistor. This configuration ensures that even when a low voltage of 2.4 to 2.5 V is supplied as an external reference voltage, the amplifying operation can be performed while generally constantly maintaining an idling current in a temperature range from a low temperature to a high temperature, and that degradation in distortion characteristics during low-temperature operation can be limited.
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U.S. Appl. No. 11/552,635, filed Oct. 25, 2006, Yamamoto et al.
Asada Tomoyuki
Maemura Kosei
Otsuka Hiroyuki
Yamamoto Kazuya
Leydig , Voit & Mayer, Ltd.
Mitsubishi Electric Corporation
Nguyen Khanh V
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