0
The step recovery diode is used as what is termed a charge controlled switch. When the step recovery diode is forward biased and charge enters it, the diode appears as a normal diode and it behaves in much the same way. When diodes switch from forward conduction to reverse cut-off, a reverse current flows briefly as stored charge is removed. When all the charge is removed it suddenly turns off or snaps off. It is the abruptness with which the reverse current ceases that enables the step recovery diode to be used for the generation of microwave pulses and also for waveform shaping.
To explain this in more detail, under normal forward bias conditions the diode will conduct normally. Then if it is quickly reverse biased it will initially appear as a low impedance, typically less than an ohm. Once the charge that is stored in the device is depleted, the impedance will very abruptly increase to its normal reverse impedance which will be very high. This transition occurs very quickly, typically well under a nanosecond.
This property allows the step recovery diode to be used in pulse shaping (sharpening) and in pulse generator circuits. The high harmonic content of the signal produced by any repetitive waveforms from step recovery diode circuits enables them to be used as comb generators where a comb of harmonically related frequencies are generated.
What else can I help you with?
Working principle of step-down chopper?
chopper
What is clipper in electronic devices and circuit?
clipper is an AC application of diode. The Clipper clipps off a portion of the input signal waveform without distorting the remaining part of the alternating waveform. We can use different type of alternating waveforms as input such as sinusoidal, Triangular, square etc. There are different types of clippers e.g. series clipper, parallel clipper etc. but the method for solving all the type of circuits are same. So there is no need to remember the procedure for one particular clipper circuit. There are different types of clippers e.g. series clipper, parallel clipper etc. but the method for solving all the type of circuits are same. Now let us discuss the procedure with the help of a problem. Suppose we have given a clipper circuit shown below: Because clipper is an AC application of diode. So we apply an AC signal at the input Vi. Our aim is to find out the waveform of Vo. The solution steps are: Step 1 : First of all analyze the circuit by bifurcating the input waveform in positive half cycle and negative half cycle.Step 1.1 : Positive half cycle : Positive half cycle is equivalent to a battery of positive polarity and variable potential.Step 1.2 : Negative half cycle : Negative half cycle is equivalent to a battery of negative polarity and variable potential. Step 2 : Now analyze the circuit with positive half cycle.The next step is to check the condition of diode i.e., whether the diode is forward bias or reverse bias.In the circuit shown above it is clear that the diode is forward bias and hence equivalent to short circuit (because it is ideal diode).Now analyze the variation of Vo.It is clear that And because Vi varies sinusoidally, so Vo also varies sinusoidally. Step 3 : Now analyze the circuit with negative half cycle The next step is to check the condition of diode i.e., whether the diode is forward bias or reverse bias.In the circuit shown above it is clear that the diode is reverse bias and hence equivalent to open circuit (because it is ideal diode).Now analyze the variation of Vo.It is clear that Step 4: Now combine these two waveform.
How do you step up ac voltage without using transformer?
A: Using a diode and a capacitor and replicating for the voltage that is desired. Be aware that the final voltage can be very hi for 120 v AC and be aware that the voltage is there but the power is limited due to repeating losses along the way.
What is construction and working of single phase transformer?
The single phase transformer works on the principle of mutual induction. Explanation: When an alternating voltage V1 is applied to a primary winding, an an alternating current I1 flows in it producing an alternating flux in the core. As per Faraday's law of electromagnetic induction, an emf e1 is induced in the primary winding. Where N1 is the number of the turns in the primary winding's induced emf in the primary winding is nearly equal and opposite to the applied voltage V1
What two words would be pronounced the same but spelled differently to fit this scenario Two scientists were working on an alternating current voltage step-up transformer when one grounded a live?
Hertz Hurts
How can a person quite drinking alcohol?
THe first step is to seek AA and they can help and guide you towards recovery. I am working on their 12 step program and after hearing many stories in AA it helped me to quit.
What is a Step Down Chart?
with drug recovery
What is the first step in creating an EFS Recovery Agent?
enabling the EFS Recovery Agent template
Can a Diode be used on a battery charger?
ya. we are using diode in a battery charger to convert ac into dc. 230v dc is step down by using step down transformer
What decision is the first step to recovery?
Realizing that you have a problem with alcohol.
The first is recognizing the need for help.?
step toward recovery
What is the first step in building construction?
A plan
Is the memory card recovery disc hard to find?
No it's not that hard to find the memory card recovery disc. A lot of websites online and forums provide step-by-step processes in which one can easily access the memory card recovery disc.
What shows an argument means working step by step to convince a reader of something?
developing an argument means working step by step to convince a reader of something.
What is first step when construction a briefing?
The first step when constructing a briefing is to collect material.
How does RAID Data Recovery work?
RAID data recovery is a process in which files are recovered from damaged systems and stored to a file system that is in good working order. Usually a Live CD is used to recover the data from the redundant corrupted files.
The New Deal's first step to achieve recovery dealt with?
Banking
