In A Voltage Follower Arrangement The Opamp Compensates The Load - what is the purpose of a voltage follower one may ask then what is the purpose of a voltage follower since it outputs the same signal it inputs what is its purpose in a circuit this will now be explained an op circuit is a circuit with a very high input impedance this high input impedance is the reason voltage followers are used this will now be explained with or without a voltage divider circuit the voltage follower or voltage buffer offers a means to transfer a voltage source signal from one impedance level to another without affecting current ohm s law v ir dictates the relationship from there voltage followers are used to match impedance in other circuits too note that there is also a current buffer which preserves the current signal source rather than voltage p div class b factrow b twofr div class b vlist2col ul li div author ja heath div li ul ul ul div div div li span class news dt.

22 09 2012 span nbsp 0183 32 in a voltage follower slightly less than 1mv of dc appears at the output which is direct coupled to the input if there is 1mv of dc at both inputs then there should be 0 v dc at the output which can t happen because there has to be 1mv there the op can be used as a voltage follower the output voltage follows the input in this arrangement the operational lifier is called a buffer and has unity gain however by inserting an ideal voltage follower between the lifier and the load simulate this circuit the overall loaded voltage gain is now 100 the unloaded voltage gain this may seem paradoxical since the voltage follower has a voltage gain of 1 but remember the voltage follower is still an lifier p div div div class b fcv2 table tbody tr data exp h data exp noani 1 td style a href https electronics stackexchange questions 148356 inverting buffer with op s h id serp.

5267 1 operational lifier a td tr tr data exp h data exp noani 1 td style a href https electronics stackexchange questions 111502 designing a voltage follower that can provide up to 5a of current to a load h id serp 5281 1 designing a voltage follower that can provide up to 5a of a td tr tbody table div class wpcbc div class req link a href search q in a voltage follower arrangement the op pensates the load site 3aelectronics stackexchange h id serp 5384 1 see more results a div div div div li li class b pag nav role navigation aria label more results for in a voltage follower arrangement the op pensates the load h4 class b hide pagination h4 ul class sb pagf li a class sb inactp sb pagp sb pagp bp b widepag sb bp b roths a li li a class sb pags sb pags bp b widepag sb bp 1 a li li a class b widepag sb bp aria label page 2 href search q in a voltage follower arrangement the op pensates.

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