Amplification system using baseband mixer

Details Amplification system using baseband mixer Amplification system using baseband mixer

1998-10-19

2000-09-12

Pascal, Robert

Amplifiers

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

330136, 327359, H03F 126

Patent

active

061183393

ABSTRACT:
An apparatus and method measure the energy in frequency bands of an amplified signal, the amplified signal being an amplified version of an RF received input signal, where the received signal has an allocated frequency bandwidth and carrier frequency. The carrier frequency, however, is not known in advance of receipt; and therefore, the apparatus and method provide structure and methodology for finding the carrier and then reducing the out-of-band frequency components of the amplified signal. The apparatus features a mixer configured as a four quadrant multiplier biased into a linear operating region. The mixer receives both the received signal and the amplified signal, and produces as its output a baseband signal. Various detection mechanisms can be used to determine the distortion correction control signals based upon the energy in portions of the amplified signal offset from the carrier signal. In a preferred embodiment, the mixer is a Gilbert Cell mixer and the received signal is a CDMA signal.

REFERENCES:
patent: 5115409 (1992-05-01), Stepp
patent: 5485120 (1996-01-01), Anvari
patent: 5892397 (1999-04-01), Belcher et al.

Affiliated with

Also associated with

Rating

Amplification system using baseband mixer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Amplification system using baseband mixer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplification system using baseband mixer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-99449