Op-amp circuit 13 December 2013 problem 1

Find the voltage gain A_v = Vo/Vi of the ideal op-amp circuit below.

Solution

Op-amp circuit 13 November 2013 problem 3

Find the range of voltage gain A_v of the ideal op-amp circuit below.

Solution

Op-amp circuit 13 November 2013 problem 2

Find the voltage gain A_v = V_o/V_i of the ideal op-amp circuit below.

Solution

Op-amp circuit 13 November 2013 problem 1

Find the output voltage V_o and the voltage gain A_v of the ideal op-amp circuit below.

Solution

DC and AC analyses of a fixed-bias BJT amplifier with a temperature stabilizing resistor and a negative power supply

Perform DC analysis of the fixed-bias BJT amplifier with a temperature stabilizing resistor and a negative power supply as shown below to find the BJT's operating point. Calculate all related voltages and currents in the circuit. Use information obtained from DC analysis to further perform AC analysis to find the small signal voltage gain, input and output impedances of this circuit at mid-band frequency.

Solution

Design of a fixed-bias BJT amplifier with a temperature stabilizing resistor at BJT's emitter and a negative power supply.

Design a fixed-bias BJT amplifier having a temperature stabilizing resistor R_E and a negative power supply so that its operating point is as shown in the IV graph. If only [commercially availble resistors] were used, how much would the Q-point deviate from the desired specification.

Solution:

DC and AC analysis of a fixed base-voltage BJT amplifier with a temperature stabilizing resistor at BJT's emitter.

Find the Q-point of a fixed base-voltage BJT amplifier having a temperature stabilizing resistor R_E. Also find related currents and voltages.

Solution

Design of a fixed base-voltage BJT amplifier with a temperature stabilizing resistor at BJT's emitter.

Design a fixed base-voltage BJT amplifier having a temperature stabilizing resistor R_E so that its operating point is as shown in the IV graph. If only [commercially availble resistors] were used, how much would the Q-point deviate from the desired specifications.

Solution

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DC and AC analyses of a fixed-bias BJT amplifier with a temperature stabilizing resistor 30 October 2013

Perform DC analysis of the fixed-bias BJT amplifier with a temperature stabilizing resistor below to find the operating point of BJT. Calculate all related voltages and currents in the circuit. Used information obtained from DC analysis to further perform AC analysis to find the small signal voltage gain, input and output impedances of this circuit at mid-band frequency.

Solution

Design of a fixed-bias BJT amplifier with a temperature stabilizing resistor at BJT's emitter.

Design a fixed-bias BJT amplifier having a temperature stabilizing resistor R_E so that its operating point is as shown in the IV graph. If only [commercially availble resistors] were used, how much would the Q-point deviate from the desired specification.

Solution:

Base-Emitter input impedance of the simple fixed-bias BJT amplifier seen by small signal input.

Show derivation of the AC resistance of the Base-Emitter junction (r_e) of the BJT circuit below in terms of emitter current. Proof that the input impedance Z_b at the Base seen by the input small signal I_b is βr_e.

Solution

Use of KVL to solve a diode circuit 30 October 2013 problem 2

Use KVL principle to find the current I and voltage V_o in the diode circuit below.

Solution:

Use of KVL to solve a diode circuit 30 October 2013 problem 1

Use KVL principle to find the current I_D and voltage V_o in the diode circuit below.

Solution:

Design of a fixed-bias BJT amplifer 29 October 2013

Design a fixed-bias BJT amplifier so that it operates as in the IV graph shown. If only [commercially available resistors] were used, how much would the Q-point deviate from desired specifications.

Solution

DC and AC analyses of a fixed-bias BJT amplifier 29 October 2013

Perform DC analysis of the fixed-bias BJT amplifier below to find the operating point of BJT. Calculate all related voltages and currents in the circuit. Use information obtained from DC analysis to further perform AC analysis to find the small signal voltage gain, input and output impedances of this circuit at mid-band frequency.

Solution

Finding a Q-point in I-V graph of a resistor with KVL October 2, 2013 problem 11

Use KVL to determine the Q-point of the 5 kOhm resistor in this circuit.

Solution:

Finding a Q-point in I-V graph of a resistor with KVL October 2, 2013 problem 12

Use KVL to determine the Q-point of the 10 kOhm resistor in this circuit.

Solution:

Solving a basic resistor circuit with KVL October 2, 2013 problem 10

Use KVL to determine the voltage at A and show the balance of powers in this circuit.

Solution:

Solving a basic resistor circuit with KVL October 2, 2013 problem 9

Use KVL to determine the voltage at A and show the balance of powers in this circuit.

Solution:

Finding a Q-point in I-V graph of a resistor with KVL October 2, 2013 problem 8

Use KVL to determine the Q-point of the 10 kOhm resistor in this circuit.

Solution:

Finding a Q-point in I-V graph of a resistor with KVL October 2, 2013 problem 7

Use KVL to determine the Q-point of the 5 kOhm resistor in this circuit.

Solution:



Solving a basic resistor circuit with KVL October 2, 2013 problem 6

Use KVL to determine the voltage at B and show the balance of powers in this circuit.

Solution:

Solving a basic resistor circuit with KVL October 2, 2013 problem 5

Use KVL to determine the voltage at B and show the balance of powers in this circuit.

Solution: