2.103 An inverting amplifier with nominal gain of-50 VIV employs an op amp having a dc...
An op-amp is to be selected for an inverting amplifier to be used at dc and very low frequencies. A closed-loop nominal gain 0f -100 is desired. Specifications indicate the minimum value of dc open-loop gain cannot exceed 0.1dB. Assume in the design of problem with the following additional specifications given: dc output due to input offset voltage 100mV dc output due to input offset voltage 5mV Determine the maximum value of input offset voltage allowed for the op-amp. If...
A DC amplifier having a single-pole response with pole frequency 39 Hz and unity-gain frequency of 3.25 MHz is operated in a loop whose frequency-independent feedback factor is 0.04. 1) Low Frequency Gain? 2) 3-dB Frequency? 3) Unity-gain frequency of closed-loop amplifier?
You have an otherwise ideal op-amp with an open-loop gain of 20. Design an inverting amplifier with this single op-amp so that it has a DC gain of -5 ±0.1. Also, please explain how this design works in words.
4. A sinusoidal signal was used as the input to the inverting amplifier below. The op amp is ideal except for its open-loop gain. It has an open loop de gain (Ao) of 100dB and a unity-gain bandwidth (f) of 100 MHz. a) Find the transfer function, H(o), including the non-ideal open loop gain, A. b) Find the 3-dB frequency for the op amp, and sketch the |Al vs. frequency graph. Label the open loop de gain, 3-dB frequency, and...
2.152 An op-amp is connected in the inverting config- uration with R2 = 20 ks2 and Ri = 10ks, where R2 is the feedback resistor. The frequency response of the closed-loop amplifier is found to fall off at a frequency of 1.2 MHz (a) What is the op-amp's unity-gain frequency fo? (b) If the open-loop gain is 2 x 10%, what is the open- loop breakpoint frequency fp?
Assuming an ideal op-amp, design an inverting amplifier with a gain of 26 dB having the largest possible R1 value under the constraint of having to use resistors no larger than 1 MΩ. If the input voltage source of this amplifier has an internal resistance r0 = 50 kΩ, how will this affect the gain? Design a solution that will eliminate the effect of the internal source resistance without having to change the values of R1 and R2.
is the range of gain values expected from such a circuit? An inverting op amp circuit is fabricated with the resistors R, and R2 having x% tolerance (that is, the value of each resistance can deviate from the nominal value by as much as x%). What is the tolerance on the realized closed-loop gain? As- sume the op amp to be ideal. If the nominal closed-loop gain is -100 V/V and x = 5, what
Sketch the Bode plots for a stable three-pole amplifier with dc gain 10^5 whose poles have magnitudes 0.1 MHz, 1 MHz and 10 MHz. Find the gain margin and phase margin of the amplifier if it is connected in a feedback loop with (a) unity feedback factor; (b) feedback factor 5.623 x 10^-5; (c) closed-loop dc gain 50 dB. In each case indicate whether the closed-loop amplifier is stable or unstable. What is the minimum stable closed-loop dc gain of...
JU Oct 2017 5 Minute Test Your Understanding Quiz A compensated Op-Amp has an open-loop gain of 10' and a dominant pole of 8 Hz. The Op-Amp is used in a closed-loop single stage amplifier which has a low-frequency gain of 50. What is the -3 dB bandwidth of the closed-loop amplifier? Note: I know of at least two ways to solve this problem
3. Operational Amplifier (op-amp) I The op-amp has several applications such in analog computers, instrumentation ts use as an inverting amplifier results are shown below: Table 3.1 OP-Amp Inverting amplifier results Rf= 100 Kn Gain Nominal 100 VN Measured gain 53.1 95.4 95.7 Frequency KHz 0.1 0.2 0.5 1.0 2.0 5.0 10.0 20.0 50.0 100.0 200.0 500.0 1000.0 Gain Nominal 10 V/V Measured gain 11.2 11.6 11.7 11.4 11.6 11.9 11.6 11.6 11.4 10.9 9.0 4.7 8.3 95.6 95.4 95.2...