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Consider an npn transistor whose base-emitter drop is 0.76 V at a collector current of 5 mA. What current will it conduct at vBE =0.70 V?
Measurements made on a number of transistors operating in the active mode with iE =1 mA indicate base currents of 10 µA, 20 µA, and 50 µA.
An npn transistor has a CBJ with an area 100 times that of the EBJ. If IS = 10-15 A, find the voltage drop across EBJ and across CBJ when each is forward biased
A pnp transistor has vEB = 0.7 V at a collector current of 1 mA. What do you expect vEB to become at iC = 10 mA? At iC = 100 mA?
A pnp power transistor operates with an emitter-to-collector voltage of 5 V, an emitter current of 5 A, and VEB = 0.8 V. For ß=20, what base current is required
Sketch and clearly label the transfer characteristic of the circuit in Fig. for-15V=vI =+15 V. Assume that the diodes can be represented by the constant
Plot the transfer characteristic of the circuit in Fig. P4.91 by evaluating vI corresponding to vO = 0.5 V, 0.6 V, 0.7 V, 0.8 V, 0 V, -0.5 V, -0.6 V, -0.7 V
In the circuit shown in Fig. the diodes exhibit a 0.7-V drop at 0.1 mA. For inputs over the range of ±5 V, use the diode exponential model
Design limiter circuits using only diodes and 10-kO_ resistors to provide an output signal limited to the range:
Design a two-sided limiting circuit using a resistor, two diodes, and two power supplies to feed a 1-kO load with nominal limiting levels of ± 2.2 V.
A clamped capacitor using an ideal diode with cathode grounded is supplied with a sine wave of 5-V rms. What is the average (dc) value of the resulting output?
The terminal voltages of various npn transistors are measured during operation in their respective circuits with the following results
When operated at a base-emitter voltage of 0.75 V, have collector currents of 0.5 mA and 2 mA. Find IS for each device. What are the relative junction areas
In a particular technology, a small BJT operating at Vbe = 30VT conducts a collector current of 200 µA. What is the responding saturation current?
Two transistors have EBJ areas as follows: AE1 = 200 µm × 200 µm and AE 2 = 0.4 µm × 0.4 µm. If the two transistors are operated in the active mode
Find the collector currents that you would expect for operation at vBE = 700 mV for transistors for which IS = 10-13 A and IS = 10-18 A.
Consider the half-wave rectifier circuit of Fig. with the diode reversed. Let vS be a sinusoid with 10-V peak amplitude, and let R = 1 kO
Consider a half-wave rectifier circuit with a triangular-wave input of 5-V peak-to-peak amplitude and zero average, and with R = 1 kO.
What is the peak voltage of the rectified output? For what fraction of a cycle does each diode conduct? What is the average output voltage?
A full-wave bridge-rectifier circuit with a 1-kO load operates from a 120-V (rms) 60-Hz household supply through a 12-to-1 step-down transformer
Augment the rectifier circuit of Problem 4.70 with a capacitor chosen to provide a peak-to-peak ripple voltage of
It is required to use a peak rectifier to design a dc power supply that provides an average dc output voltage of 12 V on which a maximum of 1-V ripple
Consider a half-wave peak rectifier fed with a voltage vS having a triangular waveform with 24-V peak-to-peak amplitude, zero average, and 1-kHz frequency
Consider the circuit in Fig. with two equal filter capacitors placed across the load resistors R.
The op amp in the precision rectifier circuit of Fig is ideal with output saturation levels of 13 V