Difference between revisions of "Electronics written problems"
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− | For each of the circuits below, find the transfer function <math>H(\omega)=\frac{V_{out}}{V_{in}}</math>. On a log-log plot, sketch the magnitude of the transfer function versus frequency. Sketch the phase angle of the transfer function versus frequency on a semi-log plot. | + | For each of the circuits below, find the transfer function <math>H(\omega)=\frac{V_{out}}{V_{in}}</math>. On a log-log plot, sketch the magnitude of the transfer function versus frequency. Sketch the phase angle of the transfer function versus frequency on a semi-log plot. Suggest a descriptive name for each circuit (e.g. "low-pass filter.") |
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− | * Draw a Bode plot for each of the circuits. | + | * Draw a Bode plot for each of the circuits. |
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Revision as of 01:35, 18 October 2018
This is Part 2 of Assignment 6.
Ideal elements
Solving circuits
For each of the circuits below, find the voltage at each node and the current through each element. |
Equivalent circuits
Measuring voltage
A circuit model for a neuron in culture connected to a patch clamp apparatus consists of a time-varying voltage source in series with an output impedance of 1011 Ω. There is an oscilloscope next to the neuron with an input impedance of 106 Ω. A circuit model for the oscilloscope is a 106 Ω resistor to ground. A new UROP in the lab attempts to measure the electrical spikes produced by the neuron (called action potentials) using the oscilloscope. The oscilloscope has a noise floor of 10-3 V.
- What is the magnitude of the action potential signal after the student connects the oscilloscope?
- Does the student succeed? Why or why not?
- What is the signal to noise power ratio?
- How many times does the student curse during the measurement attempt?
- What is the minimum input impedance that a measurement device must have in order to make a high-fidelity measurement of an action potential.
Bode plots
- Draw a Bode plot for each of the circuits.
Properties of linear systems
- For the given input signal $ x(t) $, what is the output signal $ y(t) $ in each of the circuits below?