Method and circuit arrangement for reducing passband ripple of a

Details Method and circuit arrangement for reducing passband ripple of a Method and circuit arrangement for reducing passband ripple of a

1998-02-06

1999-11-02

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

330306, H03F 304

Patent

active

059778350

ABSTRACT:
The passband ripple of a filter arrangement, including an amplifier and a bandpass filter, is tuned to a desirable level at the expense of the output return loss of the filter arrangement. Thus, the output return loss is increased as a result of reducing the ripple. To reduce the output return loss to a desired level, a lossy network is coupled to the output of the filter. The output return loss is reduced by twice the insertion loss of the lossy network. The insertion loss of the lossy network can be compensated for by increasing the gain of the amplifier.

REFERENCES:
patent: 5511236 (1996-04-01), Umstattd et al.
patent: 5521650 (1996-05-01), Ku
patent: 5603097 (1997-02-01), Kanou
patent: 5657344 (1997-08-01), Na
patent: 5689819 (1997-11-01), Nishimura et al.
patent: 5758266 (1998-05-01), Kornfeld et al.

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