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Phase-locked drive loop with amplitude regulation based on phase-shifting for gyroscopes

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4 Author(s)
T. Northemann ; Fritz Huettinger Chair of Microelectronics, Department of Microsystems Engineering - IMTEK, University of Freiburg, Germany ; M. Maurer ; S. Rombach ; Y. Manoli

This paper presents a phase-locked drive loop for gyroscopes with an amplitude regulation based on phase-shifting. Instead of regulating the AC or DC value of the driving stage in order to maintain a constant primary oscillation, this concept introduces a tunable phase delay into the driving loop. Compared to conventional amplitude regulation this concept is advantageous, since the high voltages of the driving stage can be set to a constant value and do not have to be adjusted. This reduces the complexity of the analog circuitry enormously and eases the use of higher driving voltages. Additionally this concept provides a sampling frequency for a sigma-delta modulator readout interface.

Published in:

2011 16th International Solid-State Sensors, Actuators and Microsystems Conference

Date of Conference:

5-9 June 2011