48 The op amp in the noninverting amplifier circuit E of Fig. P5.48 has an input resistance of 400 kN, an output resistance of 5 kN, and an open-loop gain of 20,000. Assume that the op amp is operating in its linear region. CE SIM a) Calculate the voltage gain (vo/vg). b) Find the inverting and noninverting input volt- ages vn and v, (in millivolts) if ve = 1 V. %3D
48 The op amp in the noninverting amplifier circuit E of Fig. P5.48 has an input resistance of 400 kN, an output resistance of 5 kN, and an open-loop gain of 20,000. Assume that the op amp is operating in its linear region. CE SIM a) Calculate the voltage gain (vo/vg). b) Find the inverting and noninverting input volt- ages vn and v, (in millivolts) if ve = 1 V. %3D
Introductory Circuit Analysis (13th Edition)
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5.48 plz

Transcribed Image Text:### Op Amp in Noninverting Amplifier Circuit
**Figure P5.47:**
This figure illustrates a noninverting amplifier circuit using an operational amplifier (op amp). The input voltage \( v_g \) is connected through a 15 kΩ resistor to the non-inverting input of the op amp. The inverting input is connected to the output \( v_o \) through a 135 kΩ feedback resistor. The power supply voltages for the op amp are +6 V and -6 V.
**Key Parameters:**
- Input resistance: 400 kΩ
- Output resistance: 5 kΩ
- Open-loop gain: 20,000
**Tasks:**
a) **Calculate the Voltage Gain (\( v_o/v_g \)):**
Determine the voltage gain of the op amp circuit in the noninverting configuration.
b) **Find the Inverting and Noninverting Input Voltages (\( v_n \) and \( v_p \)):**
Compute the values of the inverting (\( v_n \)) and noninverting (\( v_p \)) input voltages in millivolts if the input voltage \( v_g = 1 \) V.

Transcribed Image Text:### Educational Content on Operational Amplifiers and Circuit Analysis
#### Questions and Exercises
**c) Calculate the difference (\(v_p - v_n\)) in microvolts when \(v_g = 1 \, \text{V}\).**
**d) Find the current drain in picoamperes on the signal source \(v_g\) when \(v_g = 1 \, \text{V}\).**
**e) Repeat (a)–(d) assuming an ideal op amp.**
#### Diagram Description
**Figure P5.48:**
- A circuit diagram illustrating an operational amplifier setup.
- Components and Connections:
- **Resistors:**
- 80 kΩ
- 40 kΩ
- 100 kΩ
- 4 kΩ (connected to the output \(v_o\))
- **Operational Amplifier:**
- Voltage supplies of +18 V and -18 V.
- Input from source \(v_g\).
This circuit demonstrates the use of an op-amp in a configuration with various resistors and dual voltage supplies, typically used for amplification or signal processing tasks.
### Additional Exercise
**5.49 Practical Perspective:**
- **Scenario:** Suppose the strain gages in the bridge in Fig. 5.22 have the value of 120 Ω ± 1%. The power supplies to the op amp are ±15 V, and the reference voltage, \(v_{\text{ref}}\), is taken from the positive power supply.
**a) Calculate the value of \(R_f\) so that when the strain gage is lengthening reaches its maximum and the output voltage is 5V.**
This exercise involves determining the feedback resistor \(R_f\) required to achieve a desired output voltage in a strain gage setup, given specific power supply and reference conditions.
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