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The term is a pun on the expression " jewel thief " , one who steals jewelry or gemstone s. The circuit uses the self-oscillating properties of the blocking oscillator , to form an unregulated voltage boost converter .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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