Broadband predistortion linearizer with automatic temperature co

Details Broadband predistortion linearizer with automatic temperature co Broadband predistortion linearizer with automatic temperature co

1995-05-05

1996-11-19

Mottola, Steven

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330 53, H03F 126, H03F 130

Patent

active

055766609

ABSTRACT:
A predistortion linearizer for microwave power amplifiers has a linear channel and a non-linear channel. Both channels are made up of the same units. Each channel includes a variable phase-shifter, a variable attenuator and an amplifier. Each channel can further include a fixed attenuator. The two channels are coupled at their ends by couplers each introducing a phase-shift of 90.degree. so that the total phase-shift is 180.degree.. Because the components of the two channels are the same, any variations with the frequency or the amplitude of the signal or with the operating temperature cancel out. The linearizer has applications in telecommunications and in particular in multicarrier systems.

REFERENCES:
patent: 5227736 (1993-07-01), Tucker et al.
patent: 5258722 (1993-11-01), Jeffers
patent: 5291148 (1994-03-01), Reisner et al.

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