US 7,321,265 B2 | ||
Distortion compensating circuit having negative gain deviation, power amplifier using the same, and communication device having power amplifier | ||
Tohru Oka, Nara (Japan) | ||
Assigned to Sharp Kabushiki Kaisha, Osaka (Japan) | ||
Filed on Oct. 12, 2005, as Appl. No. 11/247,292. | ||
Claims priority of application No. 2004-344591 (JP), filed on Nov. 29, 2004. | ||
Prior Publication US 2006/0114066 A1, Jun. 01, 2006 | ||
Int. Cl. H03F 1/26 (2006.01) |
U.S. Cl. 330—149 [330/302] | 15 Claims |
1. A distortion compensating circuit and having a negative gain deviation for an amplifier circuit having a positive gain
deviation, comprising:
a circuit including a diode having a predetermined turn-on voltage connected between a signal path including the amplifier
circuit and ground,
a voltage applied to said diode comprising a forward bias voltage of a value less than the turn-on voltage of said diode,
and
wherein an amount of change in a ratio between output power output from the signal path and input power input to the signal
path with respect to the input power is substantially zero or negative.
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