Can the circuit be a current mirror?
Homework Answers
The Answer to this question is NO
Reason:
By observing the figure we can see two NPN transistors are connected.
Their base terminals are connected together and both the emitter terminals are grounded.
Recall the operation of the NPN transistor with common emitter configuration.
The output current at the emitter increase with the applied voltage across the collector to base and base to collector.
Considering the source is constant, the current at the output(emitter) depends on the current applied to the base terminal of the transistor.
In the given circuit there is no connection for supplying base current to the transistors to come into action.
Thus both the transistors will remain in off state and current mirroring action is impossible.
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Can the circuit be a current mirror?
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Problem 2:(20 points) Consider the RC circuit in Figure 2. You may assume that the switch...
Problem 2:(20 points) Consider the RC circuit in Figure 2. You may assume that the switch has been opened long enough for the voltages and currents to reach steady-state values. At time t = 0 the switch is closed. t-0 Figure 2: The switch in the RC circuit is closed at timet0 1. (6 points) Find the voltage v(0-) and the current i(0) just before the switch is closed. 2. (6 points) Find the voltage v(0+) and the current i(0+)immediately...
) The current-mirror circuit shown in Figure 3 utilizes pnp transistors having Isl 10-5A and/s2-2...
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) The current-mirror circuit shown in Figure 3 utilizes pnp transistors...
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Problem 1:(20 points) Consider the RL circuit in Figure 1. You may assume that the switch...
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Problem 3 (20 points) For the current divider circuit in Figure 3, calculate: a) lo and V. (10 points). b) The power dissipated in the 10 A resistor. (5 points). c) The power developed by the current source. (5 points). R3 200 VO Vo SR1 R5 3100 SA 10] 3300 3100 R2 N 200 Figure 3
Problem 2:(20 points) Consider the RC circuit in Figure 2. You may assume that the switch has been opened long enough for the voltages and currents to reach steady-state values. At time t = 0 the switch is closed. t-0 Figure 2: The switch in the RC circuit is closed at timet0 1. (6 points) Find the voltage v(0-) and the current i(0) just before the switch is closed. 2. (6 points) Find the voltage v(0+) and the current i(0+)immediately...
) The current-mirror circuit shown in Figure 3 utilizes pnp transistors having Isl 10-5A and/s2-2x10-5A for transistors Q1 and Q2 respectively and for both transistors a β 50, and |Val 10 V to source a current at Vo.It is required to design the circuit to provide an output current oflo= 1 mA at Vo = 2 V. What values of REF and R are needed? 0i 02 /REF lo
) The current-mirror circuit shown in Figure 3 utilizes pnp transistors...
Figure 1 Q 3. For the circuit in figure 2 find Vo/V. (25 Points) R, 2 Figure 2 Q4. Design a differentiator circuit as shown in figure 3 to give /u - 10 kHz and Jir- 20 KHZ The pass b (APBI = 25. (25 Points)
Problem 1:(20 points) Consider the RL circuit in Figure 1. You may assume that the switch has been closed long enough for the voltages and currents to reach steady-state values. At timet 0 the switch is opened. 1 0 Rs Ri Figure 1: The switch in the RL circuit is opened at time t 0 1. (6 points) Find the voltage v(0-) and the current i(0) just before the switch is opened. 2. (6 points) Find the voltage v(0+) and...
QUESTION 3 10 points Save Answer For the Widiar current mirror circuit shown below, design the circuit to provide a current lout=100μA, if R2-685 1A Hence, find the value of R3 (in Ω), given that VT-25mV. Voc (+9 V) R3 Q4 2N2907 Q5 2N2907 lout R2 VEE (-9 V)
Problem 2: +3 V VB ?? Figure 2 Consider the circuit shown in Figure 2, with the Base voltage, Vs, obtained using a voltage divider across the 3V supply. Assume the transistor ? to be very large (ie. ignore the base current), design the voltage divider to obtain VB=1.2V. Design for a 0.1mA current in the voltage divider. Now, if the BIT ?=100, analyze the circuit to determine the collector current (lc)
R, Figure P7.49 .50 Figure P7.50 shows a current source realized using a current mirror with two matched transistors Q, and o, . Two equal resistances R, are inserted in the source leads to increase the output resistance of the current source. If Q, is operating at gm 1 mA/V and has VA-= 10 V, and if the maximum allowed de voltage drop across R, is 0.3 V, what is the maximum avail- able output resistance of the current source?...
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Problem 1.20 The voltage and current at the terminals of the circuit element in (Figure 1) are zero fort < 0. u= (1500t + 1)e 750t V t> 0; i= 70e 7500 mA, t> 0. Part A where t is in seconds Find the time (in milliseconds) when the power delivered to the circuit element is maximum. Express your answer using three significant figures. t = 0 ms Submit Previous Answers Correct Part B Find the maximum value of p...
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