D Thread Starter ds_164 Joined Nov 6, 2004 2 Nov 8, 2004 #1 Hi, I got the following problem for homework (attached), I solved it but wanted to double check the answer. Please give it a try. Thanks. [attachmentid=226]
Hi, I got the following problem for homework (attached), I solved it but wanted to double check the answer. Please give it a try. Thanks. [attachmentid=226]
V vineethbs Joined Nov 14, 2004 56 Nov 14, 2004 #2 Originally posted by ds_164@Nov 8 2004, 11:09 PM Hi, I got the following problem for homework (attached), I solved it but wanted to double check the answer. Please give it a try. Thanks. [attachmentid=226] [post=3458]Quoted post[/post] Click to expand... i think the noninverting input is A apply a + vol to A and B grnd as it is pnp the collector current prop to exp(vbe/vt) decreases say by dI I biasing so , current thru B inc by dI 3A current source so current thru o/p trans of the second stage decreases by dI VB-Vbe=constant at emitter of the o/p transistor of the second trans so as current decreases Vce increases and o/p amp gain = +1 so o/p increases + at A => + at o/p so A is non inverting
Originally posted by ds_164@Nov 8 2004, 11:09 PM Hi, I got the following problem for homework (attached), I solved it but wanted to double check the answer. Please give it a try. Thanks. [attachmentid=226] [post=3458]Quoted post[/post] Click to expand... i think the noninverting input is A apply a + vol to A and B grnd as it is pnp the collector current prop to exp(vbe/vt) decreases say by dI I biasing so , current thru B inc by dI 3A current source so current thru o/p trans of the second stage decreases by dI VB-Vbe=constant at emitter of the o/p transistor of the second trans so as current decreases Vce increases and o/p amp gain = +1 so o/p increases + at A => + at o/p so A is non inverting
