Explanation: △V value is the same regardless of whether it is computed from the change in low dc supply or change in +Vcc or -Vee . For example, suppose that -Vee remains constant at -10v then the +Vcc has to vary from 8 to 12v as a result of change in low dc voltage. This means that the change in △V in supply voltage +Vcc is 2v in either direction from 10v. 8. Consider LM307 is initially nulled. Suppose, the op-amp has poor filter, 20mVrms then ac ripple is measured across the terminals. If Vin=0v, determine the change in output offset voltage caused by the change in supply voltage?
A. 81µVrms.
B. 8.1µVrms.
C. 0.81µVrms.
D. 810µVrms.
Answer:A
Explanation: △V value is the same regardless of whether it is computed from the change in low dc supply or change in +Vcc or -Vee . For example, suppose that -Vee remains constant at -10v then the +Vcc has to vary from 8 to 12v as a result of change in low dc voltage. This means that the change in △V in supply voltage +Vcc is 2v in either direction from 10v. 8. Consider LM307 is initially nulled. Suppose, the op-amp has poor filter, 20mVrms then ac ripple is measured across the terminals. If Vin=0v, determine the change in output offset voltage caused by the change in supply voltage?
A. 81µVrms. B. 8.1µVrms. C. 0.81µVrms. D. 810µVrms.
Explanation: The SVRR =15.85µV/V for LM307 because of poor filtering and △V=10mVrms .