Amplifiers – With amplifier bypass means
Patent
1997-08-18
1999-04-27
Pascal, Robert
Amplifiers
With amplifier bypass means
330149, H03F 126
Patent
active
058983392
ABSTRACT:
A feedforward amplifier having a distortion detection loop and a distortion elimination loop is provided that achieves increased accuracy, improved response, and stable operation. A variable attenuator is placed in front of a detector in a loop output stage, and the amount of attenuation in the variable attenuator is set large during a transient response period during the rising of the amplifier, and set small during a steady-state condition. The detection of the transition to the steady-state condition is accomplished, for example, by comparing the detector output with a prescribed threshold value. The width of perturbation is set large during a transient response period, and set small during a steady-state condition.
REFERENCES:
patent: 5455537 (1995-10-01), Larkin et al.
patent: 5515000 (1996-05-01), Maruyama et al.
Kobayashi Fumihiko
Maruyama Satoshi
Miyo Tokihiro
Seino Akira
Fujitsu Limited
Nguyen Patricia
Pascal Robert
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