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The small-signal model is said to be valid for voltage variations of about 5 mV. To what percentage current change does this correspond?
In a particular circuit application, ten "20-mA diodes" (a 20-mA diode is a diode that provides a 0.7-V drop when the current through it is 20 mA)
A designer requires a shunt regulator of approximately20 V. Two kinds of zener diodes are available: 6.8-V devices with rz of 10O and 5.1-V devices
It is required to design a zener shunt regulator to provide a regulated voltage of about 10 V
A zener shunt regulator employs a 9.1-V zener diode for which VZ = 9.1 V at IZ = 9 mA, with rz = 40 O and IZK = 0.5 mA.
Provide two designs of shunt regulators utilizing the 1N5235 zener diode, which is specified as follows: VZ =6.8 V and rz = 5O for IZ = 20 mA; at IZ = 0.25 mA
Design a 7.5-V zener regulator circuit using a 7.5-V zener specified at 10 mA. The zener has an incremental resistance rz = 30O and a knee current of 0.5 mA.
A 9.1-V zener diode exhibits its nominal voltage at a test current of 20 mA. At this current the incremental resistance is specified as 10 O.
A shunt regulator utilizing a zener diode with an incremental resistance of 8O is fed through an 82O resistor
What relative junction areas should these diodes have if their currents must have binary-weighted ratios, with the smallest being 0.1 mA?
In the circuit shown in Fig. P4.27, D1 has 10 times the junction area ofD2. What value of V results? To obtain a value for V of 60 mV, what current I2 is needed
The circuit of Fig. P4.16 can be used in a signaling system using one wire plus a common ground return. At any moment, the input has one of three values:
At what forward voltage does a diode conduct a current equal to 10,000IS? In terms of IS , what current flows in the same diode when its forward voltage is 0.7
A particular diode is found to conduct 1 mA with a junction voltage of 0.7 V. What current will flow in this diode if the junction voltage is raised to 0.71 V?
A junction diode is operated in a circuit in which it is supplied with a constant current I. What is the effect on the forward voltage of the diode
Two diodes with saturation currents IS1 and IS2 are connected in parallel with their cathodes joined together and connected to grounds.
Four diodes are connected in parallel: anodes joined together and fed with a constant current I, and cathodes joined together and connected to ground
In the circuit shown in Fig. P4.30, D1 is a large-area, high-current diode whose reverse leakage is high and independent of applied voltage, while D2 is a much
When a 10-A current is applied to a particular diode, it is found that the junction voltage immediately becomes 700 mV
Consider the graphical analysis of the diode circuit of Fig. 4.10 with VDD =1 V, R=1 kO, and a diode having IS =10-15 A.
A "1-mA diode" (i.e., one that has vD =0.7 V at iD = 1 mA) is connected in series with a 500O resistor to a 1.0 V supply.
Assuming the availability of diodes for which vD = 0.75 V at iD = 1 mA, design a circuit that utilizes four diodes/connected in series, in series
A diode operates in a series circuit with a resistance R and a dc source V. A designer, considering using a constant-voltage model, is uncertain
A designer has a supply of diodes for which a current of 2 mA flows at 0.7 V. Using a 1-mA current source, the designer wishes to create a reference voltage
In each of the ideal-diode circuits shown in Fig. P4.4, vI is a 1-kHz, 5-V peak sine wave. Sketch the waveform Resulting at vO