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Subject: Re: How to write the transfer function of the circuit?
Date: Sat, 21 Sep 2002 19:43:06 -0700
Organization: Ye 'Ol Disorganized NNTPCache groupie
NNTP-Posting-Date: Sun, 22 Sep 2002 02:40:37 +0000 (UTC)
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This will explain all:
Kevin Aylward wrote:
>"Zhao" wrote in message
>>what we want to know is as follow:
>>The outpt function of above is as follow:
>>Vo=(1/2)*Vcc*(1+R2/R1) - (R2/R1)*V1 ;
>> If we use block diagram in a control system as follow, now the
>>question is what the transfer function is ?
>>Vi _____| H(s) |____Vo
>> | |
>>H(s) = Vo/Vi = ?
>Transfer function, in this context, usually refers to the small signal
>transfer function, in which case terms involving the power supply do not
>appear, i.e. no DC terms.
>In this case, the ideal transfer function is:
>H(s) = R2/R1
>If you include the GBW of the opamp H(s) will then become a function of
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