Editing Relaxation oscillator (section)

===Applications===
Relaxation oscillators are generally used to produce low [[frequency]] signals for such applications as blinking lights and electronic beepers. During the vacuum tube era they were used as oscillators in electronic organs and horizontal deflection circuits and time bases for [[Cathode-ray tube|CRT]] [[oscilloscope]]s; one of the most common was the Miller integrator circuit invented by [[Alan Blumlein]], which used vacuum tubes as a constant current source to produce a very linear ramp.<ref name="Puckle">{{cite book
 | last1  = Puckle
 | first1 = O. S.
 | title  = Time Bases (Scanning Generators), 2nd Ed.
 | publisher = Chapman and Hall, Ltd.
 | date   = 1951
 | location = London
 | pages  = [https://archive.org/details/TimeBasesTheirDesignDevelopment/page/n96 15]–27
 | url    = https://archive.org/details/TimeBasesTheirDesignDevelopment
 }}</ref>  They are also used in [[voltage controlled oscillator]]s (VCOs),<ref name="Abidi">{{cite conference
  | first = Assad A.
  | last = Abidi
  |author2=Robert J. Meyer
   | title = Noise in Relaxation Oscillators
  | book-title = Monolithic Phase-Locked Loops and Clock Recovery Circuits: Theory and Design
  | pages = 182
  | publisher = John Wiley and Sons
  | date = 1996
  | isbn = 9780780311497
 | url = https://books.google.com/books?id=nyxGjjF-cHIC&pg=PA182
  | accessdate = 2015-09-22}}</ref> [[inverter (electrical)|inverter]]s and [[switching power supply|switching power supplies]], [[dual-slope ADC|dual-slope analog to digital converters]], and in [[function generator]]s to produce square and triangle waves.   Relaxation oscillators are widely used because they are easier to design than linear oscillators, are easier to fabricate on [[integrated circuit]] chips because they do not require inductors like LC oscillators,<ref name="Abidi" /><ref name="van der Tang" />  and can be tuned over a wide frequency range.<ref name="van der Tang">{{cite book   
  | last1 = van der Tang
  | first1 = J. 
  | first2 =  Dieter
  | last2 = Kasperkovitz
  | first3 = Arthur H.M. 
  | last3 = van Roermund
  | title = High-Frequency Oscillator Design for Integrated Transceivers
  | publisher = Springer
  | date = 2006
  | pages = 12
  | url = https://books.google.com/books?id=0rniokw7bLkC&pg=PT21
  | isbn = 0306487160}}</ref>  However they have more [[phase noise]]<ref name="Abidi" /> and poorer [[frequency stability]] than linear oscillators.<ref name="Edson" /><ref name="Abidi" />