P
Pimpom
- Jan 1, 1970
- 0
Is anyone familiar with Philips' BGxxxx series of RF amplifier
modules? They are widely used as line amplifiers in the cable TV
business, with a flat gain over the commercial TV broadcast
bands.
Most of them use a 24V supply with current consumptions of a few
hundred mAs, but their max output levels are specced to be about
60dBmV only for Dim (= intermodulation distortion?) of -60dB. I
guess this is because it's important to avoid cross modulation of
the many different channels and their transfer characteristics
are made as linear as possible. No Class C stuff. The datasheets
do not give even a block diagram and say nothing about input and
output impedances (I assume 50 ohms), max output power, etc.
I was wondering if it would be practicable to use these modules
at higher signal levels to amplify a narrow-band signal.
Harmonics could be suppressed with filters. Here's an example:
http://www.nxp.com/documents/data_sheet/BGY887.pdf
What do you think?
modules? They are widely used as line amplifiers in the cable TV
business, with a flat gain over the commercial TV broadcast
bands.
Most of them use a 24V supply with current consumptions of a few
hundred mAs, but their max output levels are specced to be about
60dBmV only for Dim (= intermodulation distortion?) of -60dB. I
guess this is because it's important to avoid cross modulation of
the many different channels and their transfer characteristics
are made as linear as possible. No Class C stuff. The datasheets
do not give even a block diagram and say nothing about input and
output impedances (I assume 50 ohms), max output power, etc.
I was wondering if it would be practicable to use these modules
at higher signal levels to amplify a narrow-band signal.
Harmonics could be suppressed with filters. Here's an example:
http://www.nxp.com/documents/data_sheet/BGY887.pdf
What do you think?