Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1996-06-19
1998-04-07
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330 85, 330293, 330294, H03F 134
Patent
active
057369003
ABSTRACT:
In accordance with the objectives of the present invention, a variety of apparatus and methods for amplifying an electrical signal are disclosed. According to one embodiment of the present invention, a dual-output stage amplifier includes an amplifier stage having an input and an output, a first output stage having an input and an output, a second output stage having an input and an output and an error stage having an input and an output. The first output stage output is coupled with the output of the amplifier stage and responsive to the amplifier stage. If the first output stage output is coupled to an output load, the first output stage is capable of providing an output current to the output load such that a first output voltage related to an input voltage at the input of the amplifier stage is maintained across the output load. In turn, the second output stage input is coupled with the output of the amplifier stage and in parallel with the first output stage. Additionally, the second output stage output is coupled to the input of the error stage while the output of the error stage is coupled to the input of the amplifier stage. As taught by the present invention, the error stage is capable of providing a feedback current to the amplifier stage input such that a difference between a second output voltage generated by the second output stage and a desired second output voltage is reduced.
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Gain Technology Corp.
Maxim Integrated Products
Mullins James B.
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