Interactive Medical Imaging Simulator Adjust the scanner parameters to see how the 32x32 CIR knowledge restores the 128x128 patient scan. Signal-to-Noise Ratio (SNR): 30 dB Hardware Blur (Sigma): 1.2 Run Reconstruction 32x32 Pilot Calibration 128x128 Raw Scan Wiener Reconstruction > System Standby... Ready for Calibration. Mathematical Theory & Simulation Logic The simulation follows a Two-Phase Stochastic Process that mimics real-world MRI and 5G communication systems. Here is the mathematical bridge between the domains: Phase I: Time-Domain Distortions In the spatial (time) domain, the patient image \(s...

Z-Transform Solution Question 9 The Z-transform of e -t sampled at 10 Hz will be: z / (z - 10) z / (z - 0.1) z / (z - 0.9) z / (z - 1.1) Options: Option 1 (ID = 12993) Option 2 (ID = 12994) Option 3 (ID = 12995) Option 4 (ID = 12996) Answer: 3 Solution: z-transform of a n equals to 1/{1 - a z (-1) } and |z| > |a| So, z-transform of e (-t) equals to 1/{1 - e (-t) z (-1) } and |e (-t) | > |a| Given z is sampled at 10 Hz, so t = 1/f = 1/10 = 0.1 Now, 1/{1 - e (-t) z (-1) } becomes 1/{1 - e (-0.1) z (-1) } or, z/{z - e (-0.1) } or, z/{z - 0.9}   as e (-0.1) = 0.9 Browse All Solved Papers (2012 - 2025) → UGC-NET Electronics Study Material (Subject 88) → Further Reading: GATE EC Previous Year Papers with Solutions

Depletion Region Width Formula | How to Calculate PN Junction Depletion Width How to Calculate Depletion Region Width in PN Junctions The depletion region width is one of the most important concepts in semiconductor physics. It determines electric field strength, junction capacitance, and device behavior in diodes and MOSFETs. 1. What is the Depletion Region? When a p-type and n-type semiconductor are joined, electrons and holes diffuse across the junction. This leaves behind fixed ions and removes mobile carriers near the junction. The region with no mobile charge carriers is called the depletion region. 2. Total Depletion Width Formula The total depletion width is: W = xₙ + xₚ Where: W = total depletion width xₙ = depletion width on n-side xₚ = depletion width on p-side 3. PN Junction Depletion Width Formula For an abrupt PN junction: W = √[(2εₛ / q) × ((N_A + N_D) / (N_A N_D)) × (V_bi − V)] Where: ...

p-n Junction Energy Band Problem 4) An abrupt p-n junction in thermal equilibrium is shown in Fig. The built-in potential V bi is given as: E F E c E c E v E v qV p qV n qV bi (1) qV n + qV p (2) E g − (qV n + qV p ) (3) E g + (qV n + qV p ) (4) E g − (qV n − qV p ) Solution: From the band diagram, we observe the vertical relationships between energy levels: The total energy difference between E c and E v is the ba...

Fermi Level, Ec, Ev, Eg Explained | Semiconductor Physics Fermi Level, Ec, Ev, Eg Explained in Semiconductor Physics Semiconductor physics is based on energy band theory. The most important concepts are: Ec → Conduction band energy Ev → Valence band energy Eg → Bandgap energy EF → Fermi level These concepts explain how electrons move inside semiconductors like silicon, germanium, and gallium arsenide. 1. Energy Band Diagram In solids, discrete atomic energy levels combine to form continuous energy bands. The two important bands are: Valence Band Conduction Band The region between them is called the forbidden energy gap. SVG Energy Band Diagram Ec Ev Eg EF Energy 2. Valence Band (Ev) The valence band contains bonded electrons. These electrons participate in atomic bonding and normally cannot move freely. At absolute z...

Tunnel Diode Equivalent Circuit Problem Electronics Problem: Tunnel Diode 3) The equivalent circuit of a Tunnel diode is shown in the following Figure. The resistive cut off frequency is given by: Ls Rs C - R Zin Tunnel diode (1)   f r =...

Resistive Cutoff Frequency vs Resonant Frequency Explained Resistive Cutoff Frequency vs Resonant Frequency Explained In electronics and signal processing, terms like cutoff frequency , resonant frequency , and resistive cutoff frequency are commonly used. Many beginners confuse these concepts because they are related to frequency response in circuits. This article explains the difference between these frequencies, the meaning of the formula 1 / (2πRC) , and how resonance differs from cutoff behavior. What is Cutoff Frequency? The cutoff frequency is the frequency at which a circuit starts significantly reducing or attenuating the signal. In RC filters, the cutoff point occurs ...

  SCR vs DIAC SCR (Silicon Controlled Rectifier) Three terminals: Anode, Cathode, and Gate Acts as a controlled switch Triggered by a gate pulse Remains ON until current drops below the holding current Used in power control and rectifier circuits DIAC (Diode for Alternating Current) Two terminals Bidirectional device No gate terminal Conducts when the applied voltage exceeds the breakover voltage Commonly used to trigger TRIACs Comparison Feature SCR DIAC Terminals 3 2 Control Method Gate-triggered Voltage-triggered Current Direction Unidirectional Bidirectional Main Use Power switchin...