Class 12 Physics Semiconductor Electronics | Fullwave Rectifier |
- Project On Semiconductor Devices For Class 12 Pdf
- Project On Semiconductor Devices For Class 12 Ncert Solutions
- Project On Semiconductor Devices For Class 12th
Fullwave Rectifier
Circuit Diagram:
- The main difference between half and full wave rectifier in circuit, is the usage of two diodes – D1 and D2
Input and Output:
Semiconductor Electronics: Materials, Devices and Simple Circuits semiconductors. However, after 1990, a few semiconductor devices using organic semiconductors and semiconducting polymers have been developed signalling the birth of a futuristic technology of polymer-electronics and molecular-electronics. In this chapter, we will restrict. Revision Notes on Solid and Electronic Device:-Thermoionic emission:- Thermionic emission is the phenomenon in which electrons are emitted by a metal contains free electrons which behave like the molecules of a perfect gas. Richardson Equation:-I = AT 1/2 e-b/T. Here I is the thermionic current density in amp per sq meter.
Working:
Case 1
- During the positive half of the input cycle of AC voltage, the junction diode D1 is forward biased as shown in the diagram above
- Hence, current flows in the above circuit as indicated
- The diode D2 is reverse biased and hence no current due to D2
- We get output when the same is measured across the load resistance RL due to the diode D1 alone
Case 2
The circuit diagram for the negative half of the input cycle of AC voltage:
- During the positive half of the input cycle of AC voltage, the junction diode D2 is forward biased as shown in the diagram above
- Hence, current flows in the above circuit as indicated
- The diode D1 is reverse biased and hence no current due to D1
- We get output when the same is measured across the load resistance RLdue to the diode D2 alone
- We observe that one of the diode conducts and the flow of current across the load resistance is in the same direction
- Also, current flows during both cycles of the input AC voltage. However, the output though unidirectional has ripple contents. Ripple contents indicate both AC and DC components
- We can get only the DC component by passing it through a filter circuit
- The filter circuit consists of Resistance and Capacitance
Project On Semiconductor Devices For Class 12 Pdf
Circuit Diagram:
Project On Semiconductor Devices For Class 12 Ncert Solutions
- C has a high capacitance value and serves as a filter circuit
- RL is a load resistance
Working:
- The capacitance offers low impedance to AC component and offers infinite impedance to DC component
- Due to this the AC component is bypassed or filtered out
- The DC component produces a voltage drop across the load resistance which is almost DC voltage
Problem : In half-wave rectification, what is the output frequency if the input frequency is 50 Hz. What is the output frequency of full wave rectifier for the same input frequency?
Solution : Half-wave rectifier –The output voltage is obtained is once in one cycle of input voltage, hence output ripple frequency after half-wave rectification = 50 Hz
Full-wave rectifier – For one cycle of input voltage, we get output twice in the same direction. Hence, the output after full wave rectification = 100 Hz