H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/62 (2006.01) H03F 1/32 (2006.01)
Patent
CA 2220922
In an automatic predistortion adjusting circuit, a splitter splits an input signal into first and second signals. A predistortion circuit applies first non-linear characteristics to the first signal, a variable attenuator adjusts an amplitude of an output signal of the predistortion circuit, a variable phase shifter adjusts a phase of an output signal of the variable attenuator, and a main amplifier amplifies an output signal of the variable phase shifter, so that second non-linear characteristics opposite to the first non-linear characteristics are applied to an output signal of the main amplifier. A directional coupler takes out a part of an output signal of the main amplifier as a branch signal, and a delay line delays the second signal. An adder adds a delayed signal passed through the delay line to the branch signal. Further, a detector detects a strength of an output signal of the first adder, and a control circuit controls the first non- linear characteristics, an attenuation amount of the variable attenuator and a phase amount of the variable phase shifter in accordance with an output signal of the detector.
Corporation Nec
Smart & Biggar
LandOfFree
Automatic predistortion adjusting circuit having stable... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic predistortion adjusting circuit having stable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic predistortion adjusting circuit having stable... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1712227