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AD8561 Hysteresis



		

			

									
						gil_he
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Jun 3, 2019 
				
			
			
		


				
		

		    		    
		    
		    	
			
hello,


In the AD8561 datasheet, page 8, a hysteresis circuit is shown:


 


The capacitor CF is added to introduce a pole into the feedback network.




The calculation for this pole is:  


Is this formula correct? In the formula, I would use R1 instead of R2.




Thank you


Gil