martyh Member Joined 2004 Paid Member 2010-01-08 10:59 pm #1 2010-01-08 10:59 pm #1 Can anybody point me to a formula for calculating the Zout of a differential pair? Thanks, Marty W woody Member Joined 2002 2010-01-08 11:37 pm #2 2010-01-08 11:37 pm #2 I believe it is simply twice what each side is. J ja2dhc Member Joined 2007 ja1cty.servehttp.com/ 2010-01-09 12:07 am #3 2010-01-09 12:07 am #3 woody said: I believe it is simply twice what each side is. Click to expand... The above is correct if impedance between Out1 and Out2. Between each Out and GND is given by following formula. Zout1=RL1//(rp1+rp2+RL2), Zout2=RL2//(rp2+rp1+RL1) martyh Member Joined 2004 Paid Member 2010-01-09 12:29 am #4 2010-01-09 12:29 am #4 Thanks to both of you. I had read Rp || Rp which didn’t seem right. Status Not open for further replies. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
W woody Member Joined 2002 2010-01-08 11:37 pm #2 2010-01-08 11:37 pm #2 I believe it is simply twice what each side is. J ja2dhc Member Joined 2007 ja1cty.servehttp.com/ 2010-01-09 12:07 am #3 2010-01-09 12:07 am #3 woody said: I believe it is simply twice what each side is. Click to expand... The above is correct if impedance between Out1 and Out2. Between each Out and GND is given by following formula. Zout1=RL1//(rp1+rp2+RL2), Zout2=RL2//(rp2+rp1+RL1) martyh Member Joined 2004 Paid Member 2010-01-09 12:29 am #4 2010-01-09 12:29 am #4 Thanks to both of you. I had read Rp || Rp which didn’t seem right. Status Not open for further replies. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
J ja2dhc Member Joined 2007 ja1cty.servehttp.com/ 2010-01-09 12:07 am #3 2010-01-09 12:07 am #3 woody said: I believe it is simply twice what each side is. Click to expand... The above is correct if impedance between Out1 and Out2. Between each Out and GND is given by following formula. Zout1=RL1//(rp1+rp2+RL2), Zout2=RL2//(rp2+rp1+RL1) martyh Member Joined 2004 Paid Member 2010-01-09 12:29 am #4 2010-01-09 12:29 am #4 Thanks to both of you. I had read Rp || Rp which didn’t seem right. Status Not open for further replies.
woody said: I believe it is simply twice what each side is. Click to expand... The above is correct if impedance between Out1 and Out2. Between each Out and GND is given by following formula. Zout1=RL1//(rp1+rp2+RL2), Zout2=RL2//(rp2+rp1+RL1)
martyh Member Joined 2004 Paid Member 2010-01-09 12:29 am #4 2010-01-09 12:29 am #4 Thanks to both of you. I had read Rp || Rp which didn’t seem right.
