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How large can vsig be (peak-to-peak) while maintaining saturation-mode operation for Q1: and Q2.
As mentioned in the text, the C B amplifier functions as a current buffer. That is, when fed with a current signal, it passes it to the collector and supplies.
The BJT is specified to have ß =100, VBE =0.7 V, and VA = 100 V. If the collector voltage undergoes a change of 10 V while the BJT remains in the active mode.
It is required to find the incremental (i.e., small-signal) resistance of each of the diode-connected transistors shown in Figure
What is the lowest voltage at the output for which proper current-source operation is maintained?
If the deviation from unity is to be kept at 0.2% or less, what is the maximum possible number of outputs for BJTs with ß = 150?
For the base-current-compensated mirror of Figure ,show that the incremental input resistance is approximately 2VT /IREF.
If the amplifier is fed with a signal source having Rsig = 5 kO and is connected to a load of 100-kO resistance, find the overall voltage gain, vo/vsig.
Find the intrinsic gain of an NMO Stransistor fabricated in a process for which k1 n = 400 µA/V2 and V1A = 10 V µm.
An NMOS transistor fabricated in a certain process is found to have an intrinsic gain of 50 V/V when operated at an ID of 100 µA.
Consider an NMOS transistor fabricated in a 0.18-µm technology for which k1 n = 400 µA/V2 and V1 A = 5 V/µm.
Sketch the circuit for a current-source-loaded CS amplifier that uses a PMOS transistor for the amplifying device.
An NMO Stransistor operated with an overdrive voltage of 0.25 V is required to have a gm equal to that of an npn transistor operated.
Find the values of gm and A0 obtained at ID =25 µA, 250 µA, and 2.5 mA.
It was fabricated in a 0.18-µm CMOS process for which µnCox = 400 µA/V2 and V_ A = 5 V/µm.
What must W be for the NMOS transistor to operate at ID = 100 µA? Also, find the values of gm and ro.
Using a CMOS technology for which k1n = 200 µA/V2 and V1 A = 20 V/µm, design a current-source-loaded CS amplifier for operation at I = 50 µA .
The two transistors have L =0.5 µmand are to be operated at ID =100 µAand |VOV |= 0.3 V. Find the required values of VG, (W/L)1, (W/L)2, and Av .
ssuming that for this process technology the Early voltage V1A =5 V/µm, find the output resistance of the current source.
For the fabrication-process technology utilized, µnCox = 400 µA/V2, V? A = 10 V/µm, and Vt = 0.5 V.
ind the device W/L ratios and the value of the resistor that sets the value of IREF so that a nominally 80-µA output current is obtained.
If IREF is 20 µA and the transistors are operating at an overdrive voltage of 0.2 V, what IO results? What is the minimum allowable value of VO .
Find the output resistance of the current source Q2: and the output resistance of the current sink Q5.
If ß of the pnp transistor is 50, what is the current gain (or transfer ratio) IO /IREF for the case of identical transistors, neglecting the Early effect?
Why does pore coalescence in a glassy material cause an increase in porosity and negative densification?