May 4, 2008 #1 R rosaeidi Full Member level 2 Joined Dec 19, 2006 Messages 143 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,298 Activity points 2,129 Hi I have a problem with matching measurment. What is the meaning of the following question? "Determine the transistor sizes for a 3σ matching of 1%."
Hi I have a problem with matching measurment. What is the meaning of the following question? "Determine the transistor sizes for a 3σ matching of 1%."
May 4, 2008 #2 F forkschgrad Full Member level 5 Joined Apr 6, 2007 Messages 271 Helped 18 Reputation 36 Reaction score 9 Trophy points 1,298 Location Philippines Activity points 2,363 Re: Transistor matching it is the 3 sigma mismatch. it means that the absolute value of the mean plus three times the standard deviation.
Re: Transistor matching it is the 3 sigma mismatch. it means that the absolute value of the mean plus three times the standard deviation.
May 4, 2008 #3 R rosaeidi Full Member level 2 Joined Dec 19, 2006 Messages 143 Helped 4 Reputation 8 Reaction score 2 Trophy points 1,298 Activity points 2,129 Re: Transistor matching You mean that for this example: ΔI/I=0.01/3 ?
May 5, 2008 #4 F forkschgrad Full Member level 5 Joined Apr 6, 2007 Messages 271 Helped 18 Reputation 36 Reaction score 9 Trophy points 1,298 Location Philippines Activity points 2,363 Re: Transistor matching nope. if you have a pair of devices with mean mismatch of -0.3% with a standard deviation of 0.1%. the 3 sigma mismatch is 0.6% 3 sigma = |-0.3%| + 3 * 0.1%
Re: Transistor matching nope. if you have a pair of devices with mean mismatch of -0.3% with a standard deviation of 0.1%. the 3 sigma mismatch is 0.6% 3 sigma = |-0.3%| + 3 * 0.1%