Micromachined silicon accelerometers and gyroscopes

2003-01-01
Najafi, K
Chae, JS
Külah, Haluk
He, GH
This paper presents research at The University of Michigan on micromachined capacitive silicon accelerometers and gyroscopes with their interface electronics to satisfy the requirements for inertial navigation applications. The accelerometer systems developed employ in-plane (lateral), out-of-plane (z-axis), and single-chip 3-axis sensors with the interface electronics. The interface electronics forms a second-order electromechanical sigma-delta modulator together with the sensor and the system can be operated in both open and closed-loop. These devices can achieve better than 2mug/rootHz resolution with a range of +/-1.35g. The single-crystal silicon ring gyroscope provides 132 mV/deg/sec sensitivity and 10 deg/hour resolution.

Suggestions

Micromachined accelerometers for inertial navigation applications
Chae, Junseok; Külah, Haluk; Najafi, Khalil (2005-01-01)
This paper presents research at The University of Michigan on micromachined accelerometers and their interface electronics to satisfy the requirements for inertial navigation applications. The accelerometer systems developed employ in-plane (lateral), out-of-plane (z-axis), and single-chip 3-axis sensors with the interface electronics. The interface electronics forms a second-order electromechanical sigma-delta modulator together with the sensor and the system can be operated in both open and closed-loop. T...
Capacitive cmos readout circuits for high performance mems accelerometers
Kepenek, Reha; Külah, Haluk; Department of Electrical and Electronics Engineering (2008)
This thesis presents the development of high resolution, wide dynamic range sigma-delta type readout circuits for capacitive MEMS accelerometers. Designed readout circuit employs fully differential closed loop structure with digital output, achieving high oversampling ratio and high resolution. The simulations of the readout circuit together with the accelerometer sensor are performed using the models constructed in Cadence and Matlab Simulink environments. The simulations verified the stability and proper ...
High performance readout electronics for uncooled infrared detector arrays
Yıldırım, Ömer Özgür; Akın, Tayfun; Department of Electrical and Electronics Engineering (2006)
This thesis reports the development of high performance readout electronics for resistive microbolometer detector arrays that are used for uncooled infrared imaging. Three different readout chips are designed and fabricated by using a standard 0.6 m CMOS process. Fabricated chips include a conventional capacitive transimpedance amplifier (CTIA) type readout circuit, a novel readout circuit with dynamic resistance nonuniformity compensation capability, and a new improved version of the CTIA circuit. The fabr...
Fabrication of a Three-Axis Capacitive MEMS Accelerometer on a Single Substrate
Aydemir, Akin; Akın, Tayfun (2015-11-04)
This paper presents a new fabrication approach and a design for the fabrication of a three-axis capacitive MEMS accelerometer where differential sensing is enabled for all sense directions. In this approach, individual lateral and vertical axis accelerometers are fabricated in the same die on an SOI wafer which is eutectically bonded to a glass substrate. Differential sensing for the vertical axis accelerometer is realized by defining the proof mass of the accelerometer on the structural layer of the SOI wa...
A CMOS switched-capacitor interface circuit for an integrated accelerometer
Külah, Haluk; Najafi, K (2000-01-01)
This paper presents a CMOS interface electronics for monolithic micromachined capacitive accelerometer systems. The interface electronics is a fully differential switched-capacitor charge integrator with its internal clock generator and sensor feedback circuit for closed-loop operation. The circuit is designed for open-loop and closed-loop operations, and provides both digital and differential analog outputs. One of the main advantages of this chip is that it can be monolithically integrated with the sensor...
Citation Formats
K. Najafi, J. Chae, H. Külah, and G. He, “Micromachined silicon accelerometers and gyroscopes,” 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/54002.