The Lever oscillator for use in high resistance resonator applications
Abstract
The Lever oscillator has been specifically designed for use with quartz resonator sensors. The use of quartz resonators as sensors is of particular interest and depending on the sensing environment, e.g., liquid, the oscillator design is both critical and difficult due to the wide dynamic range of resonator resistance possible due to damping of the resonator. Standard oscillator designs do not work well as sensor oscillators. An oscillator design will be presented that allows both frequency and loss (R(sub m)) of the resonator to be determined over a wide dynamic range of resonator loss. The Lever oscillator uses negative feedback in a differential amplifier configuration to actively and variably divide (or leverage) the resonator impedance such that the oscillator can maintain the phase and gain of the loop over a wide range of resonator resistance.
- Publication:
-
Presented at the 1993 IEEE Frequency Control Symposium
- Pub Date:
- 1993
- Bibcode:
- 1993frco.symp....2W
- Keywords:
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- Negative Feedback;
- Oscillators;
- Quartz;
- Resonant Frequencies;
- Resonators;
- Circuits;
- Damping;
- Differential Amplifiers;
- Dynamic Range;
- Feedback Amplifiers;
- Impedance;
- Electronics and Electrical Engineering