Q6. Find the dc input bias cancelling resistor Consider the analogue integrator below with explicitly shown V_{OS}=2\text{mV} input dc offset voltage at the non-inverting input; and input bias currents I_B=0.1\mu\text{A} and input offset current I_{OS}=20\text{nA} (which can be used to calculate I_{BI} and I_{BN} below). To provide a finite dc gain, a resistor R_2=1\text{M}\Omega is connected across the capacitor C_2=10\text{nF} . To compensate for the effect of I_B , a resistor R_3 is connected to the non-inverting input terminal. Find the value of R_3 . Here, R_1=10\text{k}\Omega .

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Q6. Find the dc input bias cancelling resistor Consider the analogue integrato...

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Q6. Find the dc input bias cancelling resistor

Consider the analogue integrator below with explicitly shown $V_{OS}=2\text{mV}$ V_{OS}=2\text{mV} input dc offset voltage at the non-inverting input; and input bias currents $I_B=0.1\mu\text{A}$ I_B=0.1\mu\text{A} and input offset current $I_{OS}=20\text{nA}$ I_{OS}=20\text{nA} (which can be used to calculate $I_{BI}$ I_{BI} and $I_{BN}$ I_{BN} below). To provide a finite dc gain, a resistor $R_2=1\text{M}\Omega$ R_2=1\text{M}\Omega is connected across the capacitor $C_2=10\text{nF}$ C_2=10\text{nF}. To compensate for the effect of I_B, a resistor R_3 is connected to the non-inverting input terminal. Find the value of R_3. Here, $R_1=10\text{k}\Omega$ R_1=10\text{k}\Omega.