b) Figure Q3(b) shows a difference amplifier where the resistances are given by R, = 15 kN, R2 = 60 k2, and R; = 50 k2. The op-amp in the circuit is non-ideal, with the following characteristics: IB = 80 nA Input bias current: Input offset current: lio = ±20 nA Input offset voltage: Vio = #10 mV i) List down a key feature of this amplifier. ii) Calculate the gain of the amplifier, VJV2, if V1 =0 V. iii) Calculate the output offset voltage Vos due to Vio. iv) Calculate the output offset voltage Vos due to IB+. v) Calculate the output offset voltage Vos due to IB-. R2 9 +V R, V10 w R1 oV, R3

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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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b) Figure Q3(b) shows a difference amplifier where the resistances are given by R1 = 15 kN,
R2 = 60 kQ, and R; = 50 kM. The op-amp in the circuit is non-ideal, with the following
characteristics:
Input bias current:
Input offset current: lio = ±20 nA
Input offset voltage: Vio=±10 mV
IB = 80 nA
i) List down a key feature of this amplifier.
ii) Calculate the gain of the amplifier, VJV2, if V1 = 0 V.
iii) Calculate the output offset voltage Vos due to Vio.
iv) Calculate the output offset voltage Vos due to IB-.
v) Calculate the output offset voltage Vos due to Is-.
9 +V
R,
R,
Figure Q3(b)
Transcribed Image Text:b) Figure Q3(b) shows a difference amplifier where the resistances are given by R1 = 15 kN, R2 = 60 kQ, and R; = 50 kM. The op-amp in the circuit is non-ideal, with the following characteristics: Input bias current: Input offset current: lio = ±20 nA Input offset voltage: Vio=±10 mV IB = 80 nA i) List down a key feature of this amplifier. ii) Calculate the gain of the amplifier, VJV2, if V1 = 0 V. iii) Calculate the output offset voltage Vos due to Vio. iv) Calculate the output offset voltage Vos due to IB-. v) Calculate the output offset voltage Vos due to Is-. 9 +V R, R, Figure Q3(b)
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