crwdns2936039:0iPhone 4 Gyroscope Teardowncrwdnd2936039:03crwdne2936039:0

crwdns2933803:03crwdne2933803:0

crwdns2933797:0Miroslav Djuriccrwdnd2933797:0Kho 28, 2010crwdne2933797:0

	[* black] Chipworks has confirmed that the MEMS gyroscope found inside the iPhone 4 is nearly identical to an off-the-shelf STMicroelectronics [link\|http://www.st.com/stonline/products/families/sensors/l3g4200d.htm\|L3G4200D] gyroscope.
	[* black] The picture of the die you see on the left is that of the GK10A MEMS die, found in the L3G4200D.
	[* black] The GK10A is comprised of a plate, called the "proof mass," that vibrates ([link\|http://en.wikipedia.org/wiki/Oscillate\|oscillates]) when a drive signal is applied to set of drive capacitor plates.
-	[* black] When a user rotates the phone, the proof mass gets displaced in the X, Y, and Z directions. An [link\|http://en.wikipedia.org/wiki/Application-specific_integrated_circuit\|ASIC] processor senses the proof mass' displacement through capacitor plates located underneath the proof mass, as well as finger capacitors at the edges of the package.
+	[* black] When a user rotates the phone, the proof mass gets displaced in the X, Y, and Z directions by [link\|http://en.wikipedia.org/wiki/Coriolis_effect\|coriolis] forces. An [link\|http://en.wikipedia.org/wiki/Application-specific_integrated_circuit\|ASIC] processor senses the proof mass' displacement through capacitor plates located underneath the proof mass, as well as finger capacitors at the edges of the package.

	[* black] Chipworks has confirmed that the MEMS gyroscope found inside the iPhone 4 is nearly identical to an off-the-shelf STMicroelectronics [link\|http://www.st.com/stonline/products/families/sensors/l3g4200d.htm\|L3G4200D] gyroscope.
	[* black] The picture of the die you see on the left is that of the GK10A MEMS die, found in the L3G4200D.
	[* black] The GK10A is comprised of a plate, called the "proof mass," that vibrates ([link\|http://en.wikipedia.org/wiki/Oscillate\|oscillates]) when a drive signal is applied to set of drive capacitor plates.
-	[* black] When a user rotates the phone, the proof mass gets displaced in the X, Y, and Z directions. An [link\|http://en.wikipedia.org/wiki/Application-specific_integrated_circuit\|ASIC] processor senses the proof mass' displacement through capacitor plates located underneath the proof mass, as well as finger capacitors at the edges of the package.
+	[* black] When a user rotates the phone, the proof mass gets displaced in the X, Y, and Z directions by [link\|http://en.wikipedia.org/wiki/Coriolis_effect\|coriolis] forces. An [link\|http://en.wikipedia.org/wiki/Application-specific_integrated_circuit\|ASIC] processor senses the proof mass' displacement through capacitor plates located underneath the proof mass, as well as finger capacitors at the edges of the package.