Oscillator circuit for use with high loss quartz resonator sensors
Patent
·
OSTI ID:869887
- Albuquerque, NM
The disclosure is directed to a Lever oscillator for use in high resistance resonator applications, especially for use with quartz resonator sensors. The oscillator is designed to operate over a wide dynamic range of resonator resistance due to damping of the resonator in mediums such as liquids. An oscillator design is 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.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
- DOE Contract Number:
- ;
- Other Award/Contract Number:
- AC04-76
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Number(s):
- US 5416448
- OSTI ID:
- 869887
- Country of Publication:
- United States
- Language:
- English
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/331/73/310/
actively
allows
amplifier
amplifier configuration
applications
circuit
configuration
damping
design
designed
determined
differential
differential amplifier
directed
disclosure
divide
due
dynamic
dynamic range
especially
feedback
frequency
impedance
lever
leverage
liquids
loop
loss
maintain
mediums
negative
negative feedback
operate
oscillator
oscillator circuit
phase
quartz
quartz resonator
range
resistance
resonator
resonator sensors
sensors
variably
wide
wide dynamic
wide range
actively
allows
amplifier
amplifier configuration
applications
circuit
configuration
damping
design
designed
determined
differential
differential amplifier
directed
disclosure
divide
due
dynamic
dynamic range
especially
feedback
frequency
impedance
lever
leverage
liquids
loop
loss
maintain
mediums
negative
negative feedback
operate
oscillator
oscillator circuit
phase
quartz
quartz resonator
range
resistance
resonator
resonator sensors
sensors
variably
wide
wide dynamic
wide range