Patent ID: 7046584
Filing Date: 2006-05-16
Classification: G04F,H03L

Abstract:
1. A quad compensated clock for use in a borehole, said quad compensated clock comprising: (a) a quad compensated resonator comprising four oscillator crystals (b) oscillator circuitry cooperating with said quad compensated resonator; (c) a quad compensated temperature sensor; and (d) a processor; wherein (e) outputs of said oscillator crystals in said quad compensated resonator are combined and input to said oscillator circuitry to form a quad compensated clock output with reduced sensitivity to acceleration; and (f) during a predetermined time interval, said quad compensated clock output is combined with output from said quad compensated temperature sensor using a compensation algorithm resident in said processor cooperating with said clock, to correct said quad compensated clock output for variations in crystal properties.