crwdns2936039:0iPhone 4 Gyroscope Teardowncrwdnd2936039:04crwdne2936039:0

crwdns2933803:04crwdne2933803:0

crwdns2933797:0Kristian Lauszuscrwdnd2933797:0Dzi 12, 2011crwdne2933797:0

	[* black] The V654A ASIC die (seen on the left) converts the tiny capacitive signals from the GK10A MEMS die into a digital signal which is fed into the iPhone 4.
	[* black] This data is used, for example, to turn the steering wheel of a car or to [link\|http://wireless.ign.com/articles/110/1102745p1.html\|aim a gun] in one of iPhone 4's many video games.
-	[* black] For the mechanical engineers: the sensitivity of MEMS gyroscopes is usually in mV/dps (or degrees per second), so the output of the oscillator (in mV) divided by the sensitivity (mV/dps) provides the angular rate applied to the package, in degrees per second.
+	[* black] For the mechanical engineers: the sensitivity of MEMS gyroscopes is usually in mV/dps (or degrees per second), so the output of the oscillator (in mV) minus the zerorate (in mV) divided by the sensitivity (mV/dps) provides the angular rate applied to the package, in degrees per second.