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  1. Constant extinction angle δ control
  2. Constant voltage control
  3. Constant lignition angle β control
  4. Constant current control
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Option 4 : Constant current control

Constant Current Control:

  • This method of current control regulates the current by adjusting the duty cycle to maintain a constant output current regardless of changes to the input voltage and output resistance.
  • A power supply operating in constant current mode will compare its reference against the scaled output current. This can be accomplished through the use of a hall effect sensor, a shunt with a differential amplifier, or any other current to voltage conversion method. 
  • The process of comparing the reference against the scaled output current generates an error signal which is then amplified.
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Related Questions

Consider the following solution to the producer-consumer synchronization problem. The shared buffer size is . Three semaphores empty, full and mutex are defined with respective initial values of 0, and 1. Semaphore empty denotes the number of available slots in the buffer, for the consumer to read from. Semaphore denotes the number of available slots in the buffer, for the producer to write to. The placeholder variables, denoted by P, Q, R, and S, in the code below can be assigned either empty or full. The valid semaphore operations are: wait ( ) and signal ( ). Producer: Consumer: do {         wait (P) ;         wait (mutex) ;         //Add item to buffer         signal (mutex) ;         signal (Q) ; } while (1) ; do {          wait (R) ;          wait (mutex) ;          //Consume item from buffer          signal (mutex) ;          signal (S) ; } while (1) ;   Which one of the following assignments to P, Q, R and S will yield the correct solution?
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