Purchase Solution

BJT Input Diff-Amp Stage/Off-Set Voltage

Not what you're looking for?

Ask Custom Question

Define the offset voltage in the op-amp circuits. Show that the expression for the offset-voltage compensation of BJT input diff-amp stage shown in figure 4 is given by:

Vt*ln(ic1/Is3)+ic1R'1=Vt*ln(ic2/Is4)+ic2Rs'

Determine the value of x in the potentiometer to compensate for a mismatch between active load transistors Q3 and Q4. Assume Iq=200uA, Is3=10^-14A, Is4=1.1x10^-14A, R1-R2=2K, Rx=100K

Attachments
Purchase this Solution
Solution Summary

Define the offset voltage in the op-amp circuits. Show that the expression for the offset-voltage compensation of BJT input diff-amp stage shown in figure 4 is given by: Vt*ln(ic1/Is3)+ic1R'1=Vt*ln(ic2/Is4)+ic2Rs' Determine the value of x in the potentiometer to compensate for a mismatch between active load transistors Q3 and Q4. Assume Iq=200uA, Is3=10^-14A, Is4=1.1x10^-14A, R1-R2=2K, Rx=100K

Purchase this Solution
Free BrainMass Quizzes
Air Pollution Control - Environmental Science

Working principle of ESP

Architectural History

This quiz is intended to test the basics of History of Architecture- foundation for all architectural courses.

View More Free Quizzes
Related BrainMass Solutions

  • Op-Amp

    2) A certain diff-amp has a differential voltage gain of 1500 and a common-mode gain of 0.5. Determine the CMRR and express it in dB. 3) A certain diff-amp has a differential voltage gain of 3000 and a CMRR of 90 dB.

  • Op-Amps and ICs

    When a pulse is applied to an op-amp, the output goes from -40 V to +5 V in 0.6 microseconds. What is the slew rate? 2. A certain diff-amp (differential amplifier) has a differential voltage gain of 1500 and a common-mode gain of 0.5.

  • Two Stage BJT Design

    19494 Two Stage BJT Design Design two stage amplifier and provide the hand calculation and draw the ac analysis and dc analysis with the following specification (see attachment): Small signal gain >100 Input resistance Ri > 2kΩ Output resistance

  • Desiging a battery charger

    I only need to be shown the method for achieving the resistor values. 4.00pm

    The output of the opamp comparator goes high when the voltage at + input is more than the voltage at the - input.

  • Op Amps

    Input bias current is the DC current needed by the inputs of the op-amp to operate its differential input stage properly.

  • Op-Amp

    Then at the second stage it uses a difference amplifier to cancel out the noise signals from the input signal.

  • Looking at feedback and some Opamp problems

    * The input impedance is about 2 Mega Ohms. * The common mode voltage should be within +/-12V for +/-15V supply. * The output impedance is about 75 Ohms. * The voltage gain rolls off 6dB per octave starting at 100kHz.

  • Describe the characteristics of op-amp circuit

    The expert describes the characteristics of op-amp circuits. BJT op-omp and BiCMOS op-amp is compared.

  • NMOS FET and BJT analysis

    turning off the LED.

View More Related Solutions