Need a detailed answer to this problem. Pick values for any resistors, capacitor

Question

Need a detailed answer to this problem.

Pick values for any resistors, capacitors or inductors in your circuit and design a filter that meets the following specifications: You can simulate the circuit in PSpice to verify that the design meets specifications and also use the ideal amplifier component called OPAMP in your simulations. Please note that small deviations from the design specifications are allowed and usually exist in in real circuits, but they need to be small. You need to show calculations to justify your design (don't use random values in PSpice). i. Bandpass filter for the frequency range 100MHz-1GHz ii. In the specified frequency range, the gain must be >- 1dB iii. The rolloff(slope) in the stopbands must be 40dB iv. The circuit should contain a single unity gain (voltage follower) amplifier stage

Explanation / Answer

VPWL (Piecewise linear voltage source): The PWL source is a Piece Wise Linear

function that you can use to create a wave form consisting of straight line segments

drawn by linear interpolation between points that you define. Since you can use as many

points as you want, you can create a very complex waveform this source type can be a

voltage source or a current source. The syntax for this source type is flexible and has

several optional parameters. The required parameters are two-dimensional points

consisting of a time value and a voltage (or current) value. There can be many of these

data pairs, but the time values must be in ascending order, and the intervals between time

values need not be regular. The two optional parameters are "DC" and "AC." The use of

an AC parameter with this source is not very well documented and because this source is

intended for use with a transient analysis any AC value would be ignored.

DC: Only for DC bias point analysis

AC: AC sweep simulation; the amplitude of the sine wave

The other parameters consist of time and voltage pairs, T1, V1, T2, V2, ect that

represents points, which are connected by straight line from the waveform. The figure below is

shown the VPWL.

For any of the previous discussed voltage sources, there exist the exact source except that they

produce current. There is one thing that should be mentioned; current sources in PSpice get a

little confusing. For those current sources whose circuit symbol has an arrow, you have to point

the arrow in the direction of conventionally flowing current. This applies to all current sources,

including AC and DC. Therefore placing the current source in the circuit backwards with

seemingly incorrect polarities will give the correct results.

An interesting little feature under the

markers

menu is the ability to add markers to your

circuit so you can see where the current and voltage have imaginary values in the circuit, and the

phase of your source at any point in the circuit.

The dc analysis portion of SPICE determines the dc operating point of the circuit with

inductors shorted and capacitors opened. A dc analysis is automatically performed prior to a

transient analysis to determine the transient initial conditions, and prior to an ac small-signal

analysis to determine the linear zed, small-signal models for nonlinear devices. If requested, the

dc small-signal value of a transfer function (ratio of output variable to input source), input

resistance, and output resistance will also be computed as a part of the dc solution.

It is a simple text editor where you will type your netlist and save it as a file under the

extension *.cir. The netlist is a description of the circuit on paper, without a diagram. You don’t

need to bother about this. To Check or create your own netlist, from your menu select analysis

and either select create netlist or Examine netlist. The figure below is shown how to select the

netlist file.

After you run a simulation of your circuit, Pspice created it own netlist. To open your

netlist file simply click on the Examine Netlist and the notepad will open. The file had your

circuit file name.net like the figure show below. In this file described all the values and parts of

your circuit however, not the node of your circuit. The figure below is an example of netlist file

for a boost circuit.

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.