Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
If the output resistance of the current source is 500 kO and the resistance in each collector (RC) is 12 kO, find the common-mode gain .
An NMOS differential pair is to be used in an amplifier whose drain resistors are 10 kO ± 1%. For the pair, K? nW/L =4 mA/V2.
If the output is taken differentially and there is a 1% mismatch between the drain resistances, find /Ad / , / Acm / , and CMRR.
Find expressions for Ad and VOS in terms of kn, RD, ?RD/RD, and I. Use these expressions to relate VOS and Ad .
An NMO Samplifier, whose designed operating point is at VOV =0.3 V, is suspected to have a variability of Vt of ±5 mV, and of W/L.
Find the three components of input offset voltage under the conditions that ? RD/RD = 4%, ? (W/L)/(W/L) = 4%, and ?Vt = 5 mV.
Two possible differential amplifier designs are considered, one using BJTs and the other MOSFETs.
A differential amplifier uses two transistors having VA values of 100 V and 200 V.
A differential amplifier for which the total emitter bias current is 400 µA uses transistors for which ß is specified to lie between 80 and 200.
In a particular BJT differential amplifier, a production error results in one of the transistors having an emitter-base junction area twice that of the other.
One approach to "offset correction" involves the adjustment of the values of RC1 and RC2 so as to reduce the differential output voltage to zero .
A differential input signal is applied and the output voltage is measured with a load resistance RL connected.
A current-mirror-loaded NMOS differential amplifier is fabricated in a technology for which |V1A |= 5 V/µm.
Find the differential half-circuit and derive expressions for the differential gain Ad and differential input resistance Rid .
A bipolar differential amplifier having resistance Re inserted in series with each emitter is biased with a constant current I.
If Rsig is of such a value that vid = 0.5vsig, find the gain Gv in terms of RC, re, Re, and a.
A particular differential amplifier operates from an emitter current source I = 0.4 mA. Each of the collector resistances RC = 20 kO.
As a cascade of a common-collector stage Q1: and a common-base stage Q2: Assume that the BJTs are matched and have a current gain.
Find the value of RD that results in a differential gain Ad of 8 V/V. Determine the dc voltage at the drains.
Find the percentage change required in one of the two drain resistors so as to reduce Acm to zero .
The only source of mismatch in the circuit is a 2% difference between the W/L ratios of the two transistors.
If for the specific technology utilized V1A = 5 V/µm, specify the channel length L of the cascade transistor.
For vB1 =vB2 =vicm, where vicm has a zero average, find the magnitude of the common-mode gain, / vo/vicm /.
Find the differential gain, the differential input resistance, the common-mode gain assuming the resistances RC have 1%.
Consider the basic differential circuit in which the transistors have ß = 100 and VA =100 V, with I = 0.2 mA, REE =500 kO, and RC =25 kO.