Feedforward amplifier

Details Feedforward amplifier Feedforward amplifier

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.

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