ADSL line filter


Posted on Jun 13, 2012

The above diagram is a standard low-pass telephone line filter (L1,C1,L3,C2). L2 and L4 are needed since we're dealing with the 'Tip' and 'Ring' of a phone line which may carry up to 90VAC. I used a similar circuit on 3 phone-lines back in the early 80's when I was running Scottsdale BBS and the filters performed fine. Additional info can be found in the ARRL Handbook, etc. For the two capacitors, the higher the voltage the better, but the 400V types are the easiest to obtain.


ADSL line filter
Click here to download the full size of the above Circuit.

L1,L2 = 6.8mH, inductor L3,L4 = 10mH, inductor C1 = 0.022uF, 250-600V C2 = 0.015uF, 250-600V




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Dc static switch
Stabilized-capacitance-buffer
DOD Phasor 595
analog to digital converter adc0804
KIA7217AP 5.8W AUDIO POWER AMPLIFIER. CAR STEREO CAR RADIO OUTPUT
OP37 low noise microphone preamp circuit design electronic project
Process-Control
oscillator and frequency divider schematics
Stereo Digital Camera Power-up Pulse Generator
One of reversing circuit reverse braking resistor in series with a DC motor armature start
FS810 integrated power amplifier circuit diagram
50W Tube-Valve SW transmitter



Top