AMIE Study Circle Blog

  A lot of AMIE aspirants are at cross roads—whether to continue/discontinue AMIE in present scenario when fresh AMIE admissions and re-registration are suspended till further orders. The case is being fought in Delhi High Court and nobody knows the outcome. The social media is full of rumours which are void of substance. Under such a backdrop, a million-pound question is—should an AMIE aspirant, who is eligible to continue his AMIE, should stop or appear in whatever semesters left. Remember, stopping doing AMIE now may lead to loss of money and your hard core efforts. AMIE is still the cheapest option with so many advantages . You might have to spend many times more money joining AMIE in new protocol and with number of subjects almost double and practicals as many as 40! In our opinion, they must continue with it and try to finish their AMIE at the earliest. There is no harm in doing so as it is the lowest cost option for working aspirants. It would work as a fixed deposit—will benef

  Choose the correct answer for the following (10 x 2)   1. An op-amp has a voltage gain of 1,00,000 operates with a supply voltage of ± 15 V. If a difference voltage of 1 V is applied at its input, then the output voltage should be (a) 0 (b) 1,00,000 V (c) Cannot be more than ± 15 V (d) 1 V   2. A DC power supply has open circuit voltage of 100 V. When the full load current is drawn, the output drops to 80 V. The percentage voltage regulation is (a) 84% (b) 25% (c) 20% (d) 40 % 3. The minimum number of comparators required to build an 8-bit flash ADC is (a) 8 (b) 63 (c) 255 (d) 256 4. An AM transmitter has carrier power output of 50 W. Total Power produced with 80 % modulation is (a) 66 W (b) 60 W (d) 40W (d) 36 W 5. If the differential voltage gain and common mode voltage gain of a differential amplifier arc 48 dB and 2 dB respectively; then its common mode rejection ratio is (a) 23 dB (b) 25 dB (c) 46 dB (d) 50dB 6. A 741 type op-amp has a gain-bandwidth product of 1 MHz. A non inve

Choose the correct answer for the following (10 x 2)   1. When a differential amplifier is operated single ended, (a) The output is grounded (b) One input is grounded, and a signal is applied to the other (c) Both inputs are connected together (d) The output is not inverted   2. I f A DM = 3500; A CM = 0.35, the CMRR is_______ (a) 1225 (b) 10,000 (c) 80 dB (d) Answers (b) and (c)   3. Negative feedback _____ (a) Increases the input and output impedances (b) Increases the input impedance and bandwidth (c) Decreases the output impedance and bandwidth (d) Does not affect impedance or bandwidth.   4. The cut-off frequency of a first-order low-pass filter for RI = 2.5 kW and CI = 0.05 µF is (a) 1.273 kHz (b) 12.73 kHz (c) 127.3 kHz (d) 127.3 Hz   5. Which among the following does not belong to the category of LC oscillators? (a) Hartley oscillator (b) Colpitt’s oscillator (c) Clapp oscillator (d) Wein bridge oscillator   6. Which among the following is not an advantage of RC coupled ampli

  Choose the correct answer for the following (10 x 2)   1. Compared to NMOS OP-AMP, most CMOS OP-AMPs have (a) higher CMRR (b) lower CMRR (c) lower slew rate (d) higher power dissipation   2. The operational transconductance amplifier is a single chip amplifier in which the transconductance is controlled by an externally connected (a) resistance (b) capacitor (c) choke (d) voltage 3. In a full-wave rectifier, independently of the filter used, the peak inverse voltage across each diode divided by the maximum transformer voltage measured from midpoint to either end equals to (a) 0.25 (b) 0.50 (c) 10 (d) 2.0 4. For Butterworth & Chebyshev filters, the correct statement is: (a) Butterworth response has a sharp cut-off (b) Chebyshev response has a flat response in the pass band (c) Butterworth response has ripples in the pass band (d) Chebyshev response has ripples in the pass band 5. A zero crossing detector converts a sinusoid into a (a) saw tooth wave (b) triangular wave (c) square

  Choose the correct answer for the following (10 x 2)   1. In the common mode, (a) Both inputs are grounded (b) The outputs are connected together (c) An identical signal appears on both the inputs (d) The output signal are in-phase   2. The differential gain is ____ (a) Very high (b) Very low (c) Dependent on input voltage (d) About 100   3. The input impedance of a differential amplifier equals r’e times _____ (a) β (b) RE (c) RC (d) 2β   4. An astable multivibrator also known as (a) One shot multivibrator (b) Free-running multivibrator (c) Biastable multivibrator (d) Monostablc multivibrator   5. Which among the following are regarded as three-pin voltage regulator ICs ? (a) Fixed voltage regulators (b) Adjustable voltage regulators (c) Both (a) and (b) (d) None of the above   6. The standard value for Intermediate Frequency (IF) in double conversion FM receivers is (a) 455 KHz (b) 580 KHz (c) 10.7 MHz (d) 50 MHz   7. Operations of computer arithmetic and logic unit are directed by

Answer the following in brief ( 2 x 100) State and explain Concurrent Engineering. Simultaneous (concurrent) Engineering - A way of simultaneously designing products, and the processes for manufacturing those products, through the use of cross-functional teams to assure manufacturability and to reduce cycle time. Give an example of a design for maintenance. Design for Maintainability (DfM) is the practice of integrating operations and maintenance considerations into project planning and design to achieve effectiveness, safety, and economy of maintenance tasks during the lifespan of a facility.  For example, replacing all the fluorescent lights in an office once a year can be cheaper than replacing lights individually as they fail, because labor is used more efficiently. Since maintainability is designed in, it is important to specify both reliability and maintainability targets early in the design cycle. Differentiate between hot forging and cold forging. The cold forging manufacturing

Choose the correct answer for the following (10 x 2) 1. An example of a military-grade op-amp with a higher slew rate is (a) 741 (b) 741 C (c) 741 A (d) 741 S 2. A non-inverting amplifier with a gain of 100 is nulled at 25°C. Determine the output voltage if the temperature rises to 40°C for an offset voltage drift of 0.15 MV/°C. (a) 600 MV (b) 450 MV (c) 225 MV (d) 60 MV 3. An example of a negative regulator is (a) LM117 (b) LM137 (c) LM217 (d) LM317 4. The operational transconductance amplifier outputs a current proportional to its (a) Input voltage (b) Input resistance (c) Input capacitance (d) Input conductance 5. A second-order low-pass filter has a roll-off rate of (a) - 40 dB/octave (b) - 40 dB/decade (c) - 20 dB/octave (d) - 20 dB/decade 6. A quadrature oscillator generates both  (a) Cosine wave and rectangular wave  (b) Cosine wave and triangular wave  (c) Cosine wave and sawtooth wave  (d) Cosine wave and sine wave 7. A pulse position modulator can be built using a 555 (a) Mon