Phase cancellation in a multi-output distribution amplifier at c

Details Phase cancellation in a multi-output distribution amplifier at c Phase cancellation in a multi-output distribution amplifier at c

1996-06-03

1999-04-27

Tung, Bryan

Television

Special applications

Manufacturing

455 31, H04N 7173

Patent

active

058984542

ABSTRACT:
A multi-output distribution amplifier includes a forward amplifier and a reverse amplifier and multiple outputs. The forward and reverse paths are separated utilizing low and high pass filters. The geometric mean frequency between the respective pass bands of the high and low pass filters is known as the crossover frequency. A circuit for providing a 180 degree phase reversal such as a balun transformer is connected in series with one (in a dual output arrangement) or half the reverse paths of an arrangement involving three or more forward or reverse paths to improve crossover isolation. For example, in a typical dual output distribution arrangement where the amplifiers are not padded, close to 20 dB of crossover isolation improvement is accomplished by simply connecting a balun transformer in series with one or the other of the low pass filters connected to one or the other forward direction output. At a minimum, a 6 dB improvement can be achieved.

REFERENCES:
patent: 3566046 (1971-02-01), McCormick et al.
patent: 3806813 (1974-04-01), Eller
patent: 3855431 (1974-12-01), Stewart
patent: 3889072 (1975-06-01), Stewart
patent: 4238766 (1980-12-01), Gargini
patent: 4390854 (1983-06-01), Colvin
patent: 4982440 (1991-01-01), Dufresne et al.
patent: 5068630 (1991-11-01), Gris
patent: 5126702 (1992-06-01), Gris
patent: 5204644 (1993-04-01), Dalisda
patent: 5218714 (1993-06-01), Ishibashi et al.
patent: 5317392 (1994-05-01), Ishibashi et al.
patent: 5343158 (1994-08-01), Gris et al.
patent: 5519434 (1996-05-01), Fasquel

Affiliated with

Also associated with

Rating

Phase cancellation in a multi-output distribution amplifier at c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase cancellation in a multi-output distribution amplifier at c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase cancellation in a multi-output distribution amplifier at c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-688591