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https://designers-guide.org/forum/YaBB.pl Design >> Analog Design >> What's the difference between trimming and calibration? https://designers-guide.org/forum/YaBB.pl?num=1262076614 Message started by chmf on Dec 29th, 2009, 12:50am |
Title: What's the difference between trimming and calibration? Post by chmf on Dec 29th, 2009, 12:50am What's the difference between trimming and calibration? Thanks. |
Title: Re: What's the difference between trimming and calibration? Post by solidstate on Dec 29th, 2009, 2:12am Hi chmf, The way I see it, trimming is adjusting something inside a device or circuit so that the difference between the device output and a reference becomes (ideally) zero. Think of adjusting a resistor in a bandgap to get a certain output voltage. Trimming = changing something in the circuit. Calibration, on the other hand, is to measure the difference between a device output and a reference, store it, and then compensate for it, e.g. storing the offset of an ADC in a microcontroller and subtracting it there... this leaves the circuit untouched. |
Title: Re: What's the difference between trimming and calibration? Post by Mayank on Dec 29th, 2009, 3:32am In one Line, Trimming is done through Calibration. If you talk circuitwise [ & not much different from solid-state's explanation ], Calibration ckt refers to the cktry used to measure the variation in actual o/p from desired/reference o/p of the DUT. Trimming refers to placing programmable/tunable components in your ckt which can be calibrated through a calibration ckt. -- Mayank. |
Title: Re: What's the difference between trimming and calibration? Post by sheldon on Dec 29th, 2009, 7:51am CHMF, Not sure that there are any standard definitions. I would lean more towards trimming as being a "hard" change to the system, for example, laser trimming or blowing fuses. The traditional analog types of circuit tuning. While calibration is a "soft" change to the system, for example, digitally selecting a combination of varactors that give the correct oscillation frequency for a VCO. So the digital techniques used for digitally-assisted analog design would count as calibration. Best Regards, Sheldon |
Title: Re: What's the difference between trimming and calibration? Post by thechopper on Dec 29th, 2009, 4:22pm I'm mostly with Mayank in this one... In my opinion, calibration involves a dedicated circuit for measuring the variation of the circuit's parameter to be tuned; such circuit included in the system + the compensation means Trimming is just the compensation means. Best Tosei |
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