Explanation: In a pinched resistor, the sheet resistivity can be increased by reducing its effective area. This technique is used to achieve high value of sheet resistance from ordinary diffused resistor. 3. How pinched resistor can give resistance in order of mega-ohm in a reasonably small area?
A. By increasing fabrication steps
B. By offering bulk resistance in n-region
C. By reducing conduction path
D. By limiting the thickness of are
Answer:A
Explanation: In a pinched resistor, the sheet resistivity can be increased by reducing its effective area. This technique is used to achieve high value of sheet resistance from ordinary diffused resistor. 3. How pinched resistor can give resistance in order of mega-ohm in a reasonably small area?
A. By increasing fabrication steps B. By offering bulk resistance in n-region C. By reducing conduction path D. By limiting the thickness of are
Explanation: In pinched resistor structure, one of the diode conducts in reverse direction and only a small reverse saturation current can flow through n-type material. By doing so, the effective cross-sectional area of the conduction path will be reduced and resistance between two contact lead increases. 4. Which of the following is not used as metallic film in the thin film resistor?