20.9.10

Electronics Trivia 12

Why does silicon require higher energy level compared to Ge?

  • Because its valence electrons are more tightly bonded to the parent nuclei 

Why is biasing important to BJT’s?

  • to have a fixed current amplification level

What does thermometer resistor measure?

  • Temperature

If the loop gain of the oscillating doesn’t obey Barkhevun(ano daw ‘to?) principle (loop gain = 1), what will happen?

  • Stop oscillating

If the MOSFET operates higher than the pinch off voltage, what happens to the drain current?

  • the drain current is constant

What do you need in order to get the product of two binary?

  • Adder,subtractor and shift register

Databus” refers to

  • data lines in the system bus

Transputer is a

  • 32 bit device

The measure of consistency or repeatability

  • Precision

The unit of absolute permittivity

  • Farad/meter (farad per meter)

The main feature of common emitter

  • signal phase reversal

The main advantage of swinburnes?

  • economical and convenient

A device with two plate and between them is an insulator

  • Capacitor

A device that converts sinewave to series of pulses through the application of comparator circuits

  • Timing marker generator


A filter that rejects a band of signals/frequencies and pass the rest

  • Bandstop filter

The ratio of fractional difference of amplification with feedback to the fractional difference of amplification without feedback

  • sensitivity of transfer gain

Why monolithic ICs are more used than Film ICs?

  • because of its linear property

Why is bleeder resistor used in biasing DC circuits?

  • to improve regulation and filtration

What must be added to improve its linearity of the bootstrap and time-base miller?

  • a compensating network

What must be the reason why amplifier with feedback changes with increasing frequency?

  • because of capacitive elements

In hall effect, the electric field is

  • in normal with magnetic field and current

Logic circuits are for

  • logic decision

Photo darlington is composed of

  • a phototransistor and transistor

Op amp shunt regulator differ from a series regulator because

  • the line resistor is in series with the control element

The trickle charging of battery

  • keep it fresh and fully charged

Q-meter is based on the theory of

  • series resonance

“Metallization” means

  • interconnection of conductors and bond gaps

For amplifiers, if 3dB below resonance is lowered, 3dB upper resonance is raised, what happens to BW?

  • Increased

Maxwell L/C bridge is so called because of

  • balance of two opposite impedance in opposite arms

Battery buffer

  • decreases variation of voltage and current supplied by dc generators

SCS acts ON state by

  • pulsating pulse in its cathode gate

Access of identity register in a digital computer uses

  • address modification

In N channel MOSFET, the value of gate voltage is

  • high positive

An XOR produce only output when 2inputs are

  • Different

In Op amp, when the input resistance is infinite, input current is

  • Infinity

In a transient, pure resistive circuit

  • have no stored energy

Output impedence, ho, ideal and CB connected has

  • 0 siemens

In an RL filter, Ripple factor

  • remains constant with load current

Decibel measures

  • power level

In an RL low pass filter, -12dB/octave is equal to

  • -40dB/decade

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