Operating points of diodes 25 February 2014

Find the operting (Q) points of the upper diode (D1) and lower diode (D2) showing the current passing through and voltage across each diode.

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:

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:

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:



Finding a Q-point in I-V graph of a resistor with KVL October 2, 2013 problem 4

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 3

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


Solution: