Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
In a bipolar differential-amplifier circuit, the bias current generator consists of a simple common-emitter transistor operating at 200 µA.
The common-mode gain and the CMRR if the bias current I is generated using a simple current mirror.
To determine the required bias current I, derive an expression for the total voltage at each of the collectors in terms of VCC and I in the presence.
An npn differential amplifier with I = 0.4 mA, VCC = VEE = 2.5 V, and RC = 5 kO utilizes BJTs with ß = 100 and vBE = 0.7 V at iC = 1 mA.
An npn differential pair employs transistors for which vBE =690mVat iC =1 mA, and ß =50. The transistors leave the active mode at vCE 0.3 V.
Find the ripple component of the collector voltages, vC1 and vC2, as well as of the difference output voltage vod = vC2 -vC1.
Provide a tabulation of the ratio (?iE1/I ) /vid , which represents the proportional transconductance gain of the differential pair, versus vid .
For a differential input signal of zero volts, what do the collector currents become?
A BJT differential amplifier is biased from a 0.5-mA constant-current source and includes a 400-O resistor in each emitter.
Design a BJT differential amplifier to amplify a differential input signal of 0.1 V and provide a differential output signal of 2 V.
Explore the trade-off between input common-mode range and differential gain in the design of the bipolar BJT.
What is the largest possible input common-mode voltage for which operation is as required? Assume a ? 1.
With no emitter resistances Re, use the large-signal model to find iC1 and iC2 when vid = 20 mV.
What is the maximum allowable value of the input common-mode voltage, VCM? Recall that to maintain an npn BJT in saturation.
Sketch the circuit and give its differential half-circuit. If VA =20 Vfor all transistors, find the differential voltage gain achieved.
Operate all transistors at VOV = 0.15 V and assume that for the process technology in which the circuit is fabricated, Vtn = 0.4 V and µnCox = 400 µA/V2.
Use Eq. to show that if the term involving v2 id is to be kept to a maximum value of k then the maximum possible fractional change .
Design a MOS differential amplifier to operate from ±1-V power supplies and dissipate no more than 1 mW in the equilibrium state.
At what overdrive voltage will each of Q1: and Q2: be operating when vid = 0?
Specify the W/L ratios and the bias current. The technology available provides Vt =0.5 V and µnCox =400 µA/V2.
Design a MOS differential amplifier to operate from ±1-V supplies and dissipate no more than 1 Mw in its equilibrium state.
If each of the two transistors is operating at an overdrive voltage VOV = 0.2 V, what must the value of I be?
A MOS differential amplifier is designed to have a differential gain Ad equal to the voltage gain obtained from a common-source amplifier.
A differential amplifier is designed to have a differential voltage gain equal to the voltage gain of a common-source amplifier.
Figure shows Amos differential amplifer with the drain resistors RD implemented using diode-connected PMOS transistors,Q3: and Q4.