Amplifiers – With amplifier condition indicating or testing means
Patent
1995-10-17
1997-04-22
Mulllins, James B.
Amplifiers
With amplifier condition indicating or testing means
330151, H03F 132
Patent
active
056232276
ABSTRACT:
An amplifier circuit (100) for use in a radio frequency system. The circuit is comprised of a first amplifier (22) having a first input (20) receiving a first signal (16) and a first output (24). A first coupler (18) samples the first input (20) of the first amplifier (22) and a second coupler (26) samples the first output (24) of the first amplifier (22). A third coupler (36) then compares an output of the second coupler (28) and an output of the first coupler (34), producing an error signal (38) which is substantially indicative of the difference between the first input (20) and the first output (24). A fourth coupler (44) combines the error signal (38) with a second signal (48) to produce a composite signal (50), the second signal (48) at least partially correlated with the first signal (16) received by the first input (20) of the first amplifier. A second amplifier (52) is responsive to the composite signal (50) and produces a second output (54).
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Everline Paul
Obermann Mark
Maddox Donna Rogers
Motorola Inc.
Mulllins James B.
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