CHAPTER 8:
REGULATOR & OSCILLATOR
Assoc. Prof. Loan PHAM NGUYEN
Hanoi, October 2022
Part1: Regulator
◻Regulator principle
◻Linear regulator
🞑Linear series regulator
🞑Linear shunt regulator
◻Switching regulator
🞑Buck DC-DC converter (Up)
🞑Boost DC –DC converter (Down)
◻IC regulator
2
Regulator principle
◻Vin: DC with ripples
◻Vout: DC without ripples (very small ripple)
🞑Input and load variation in a limited range
🞑High efficiency (low power loss)
3
Linear series regulators
◻Control element is a pass transistor
◻Sample circuit: voltage sensor
◻Error detector: to compare output voltage to ref.
voltage
4
Linear series regulator
◻Corresponding element: control element, sample
circuit, error detector
5
◻How it works?
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