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# Circuits

### Op Amp Circuits

Attached is the problem and the work I've done so far. Please check to make sure it is absolutely correct and then help me understand and SOLVE the rest of the problem. **Any bottom of any circuit cutoff, it's just a horizontal line for ground w/ nothing else.

### RL/RC Circuits

A series RL circuit with L = 3.00 H and a series RC circuit with C = 3.00 have equal time constants. If the two circuits contain the same resistance R, (a) What is the value of R and (b) What is the time constant?

### Develop a state space model of a current-fed series RC circuit.

Develop a state space model of a current-fed series RC circuit. Use Simulink to simulate the dynamic behaviour of a current-fed series RC circuit. What happens when you do a parameter analysis of this model? Explain your observations! The attachments are: A model of a voltage - fed series RC circuit And a model of the RC

### Thevenin Equivalent Circuit for the Network

Find a Thevenin equivalent circuit for the network shown (see attached file)

### Electric Circuits Problem

Question: Find the current flowing through the inductor as per attachment file #1.

### Circuit Theory Problem

Assume an infinite network made of 1nH inductors as shown. Furthermore assume that there is not mutual inductance. What is the effective inductance between points A and B? [The number only, i.e. Leff =?] (see diagram in the attached file for visual representation)

### AC/DC BJT transisitor Circuit Analysis

For the circuit in the image, Beta=120, VCC=5V, Va=100V, and Rb=25kohms. Determine Vbb and RC such that Rpi=5.4kOhms and the Q-point is in the center of the load line. I have a formula for Rpi=(Vt*Beta)/Icq. From this I found Icq=1.25x10^-4 Amps. However, is this a correct way to determine Icq? The question said to d

### Bias stable circuit design with capacitors

For the circuit, design a bias stable circuit such that Icq=.8mA and Vceq=5V. Let Bf=100. Using the results, determine the percentage change in Icq if Bf is in the range of 75<=Bf<=150. Repeat this if Re=1kOhms. Rth=.1(1+b)re=.1*101*.5Kohms=5050 Ohms I can do KVL around the b-e loop to find Vth, but how do I split the two

### Total charge provided by a car battery

A car battery has a rating of 245 ampere hours (Ah). This rating is one indication of the total charge that the battery can provide to a circuit before failing. What is the total charge (in coulombs) that this battery can provide?

### Circuit Output

For the circuit in Fig. P3.105, each utilizing an ideal diode(or diodes), sketch the output for the input shown. Label the most positive and most negative output levels. Assume CR.>>T. Please see the attached document.

### Design a logic circuit

Design a logic circuit with 4 inputs and an output. Please see the attached MS Word file for the complete problem and table.

### Anesthetic vaporization and controlled delivery

In a vaporizer a volatile anesthetic liquid is evaporated into a gas which eventually flows to the patient. A lot of attention is directed toward temperature maintenance in order to assure that the patient receives the proper concentration. Why is temperature control important? What methods can be used to actually control the

### Fermi Energy and Circuits

REVISION QUESTIONS Please could you provide detailed answers from the questions below; 1. a silicon n-p-n bipolar junction (BJT) is designed with emitter, base and collector doping levels of 1019 cm-3 , 1015 cm-3 and 5 × 1017 cm-3 , respectively. Assuming the intrinsic carrier concentration (ni) in silicon to be 101

### Circuits: Determine how brightness of bulbs change when switch is closed

See diagrams in attached file. For each of the following circuits, determine how the brightness of the bulbs change when the switch is closed. Please see attachment Next Time Problem 3 November 2003 For each of the following circuits, determine how the brightness of the bulbs change when the switch is closed. A.

### Amount of heat produced in 3 seconds by a circuit with voltage

What is the amount of heat produced in 3 seconds by a circuit that has a voltage of 5 and the resistance is 10?

### Electricity: Calculator draws current for 5 minutes. How much charge flows through it?

A calculator draws a current of 0.0001 A for 5 minutes. How much charge flows through it?

### Two springs have one end fixed on opposite sides of the box

See attached file for diagram. In the following circuit, what is the current through R1 at T=1 second after the switch is closed? How long does it take the capacitor to be 95% fully charged?

### 524 Electricity: Calculate monthly charge for running a scroll saw

CMP is installing a new transformer to supply power to my woodworking shop. Its primary side has 200 turns (110 volts), and its secondary side had 500 turns. It supplies power to the following circuit: (refer to attachment). CMP charges me \$0.015 per kWhr. My scroll saw (item R3) runs for 45 hours per month. What is my month

### Calculate capacitance calculated voltage across each capacitor

See attached jpg for question. Calculate capacitance, calculate voltage across each capacitor.

### Find the voltage, v(t), for t>0 for the circuit shown (security alarm)

A security alarm for an office building door is modeled by the circuit shown. The switch represents the door interlock, and V is the alarm indicator voltage. The switch has been closed for a long time at t=0. find the voltage, v(t), for t>0 for the circuit shown. Please see attached file for circuit.

### Calculate impedance and current in the circuit.

For the circuit shown in attachment, find the combined impedance of the 160 uH inductor and 10uF capacitor when w=25 M rad/s. Then find i(t) when Vs(t)=20 cos (wt+pi/4) and w=25 M rad/s.

### Calculate the approximate switching time that is obtained if the output is loaded by a capacitance of 0.2 pF due to interconnections and the inputs of other gates, in the given CMOS inverter circuit.

The circuit shown in Figure B2 (in the attachment) is of a CMOS inverter driving a capacitive load. VDD represents logic level "1" and zero volts logic level "0". M1 is an nMOS device and M2 is a pMOS device. Calculate the approximate switching time that is obtained if the output is loaded by a capacitance, CL, of 0.2 pF due