Quartz crystal oscillators with low acceleration sensitivity

The acceleration sensitivity of quartz crystal resonators imposes severe limitations on their use in nonlaboratory environments. It is shown that by using two resonators connected in series and properly orientated with respect to one another, it is possible to substantially reduce the net acceleration sensitivity of the composite or compound crystal resonator. First qualitative experimental results on acceleration, also some experimental theories of studies related to the introduction of the two resonators comprising the compound resonator, are presented. From these studies it appears feasible to fabricate compound crystal resonators exhibiting acceleration sensitivities at least 10 times smaller than the resonators used individually.