Heater controller for atomic frequency standards

Details Heater controller for atomic frequency standards Heater controller for atomic frequency standards

1994-12-02

1997-08-12

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219501, 219505, 219210, 331 1R, 331 69, 330289, H05B 102

Patent

active

056561890

ABSTRACT:
A heater controller for an atomic frequency standard provides accurate and stable temperature control for an assembly, such as a lamp assembly, by regulating a current flow through a heating device so as to maintain a substantially constant heating power output during start-up and by reducing the DC temperature errors of the system during normal operation. The heater controller includes an integrating amplifier which generates an amplified temperature signal based on the temperature of the lamp assembly. The heater controller further includes a device for receiving the amplified signal from the integrating amplifier and establishing a control voltage having an upper limit based on a voltage of the heater power supply. An attenuator is provided for attenuating an output signal from the receiving device by an attenuation factor sufficient to offset a substantial portion of the amplified temperature signal, as required for thermal control loop stability at a frequency above the gain transition frequency, wherein the attenuation factor permits an increase in the gain of the integrating amplifier above the gain transition frequency, and wherein the increase in gain is achieved by decreasing the value of the input resistor of the integrating amplifier. In turn, the reduction in value of the input resistor results in a decrease in an amount of DC temperature error generated by the lamp assembly, wherein the temperature error is a result of leakage currents and offset currents flowing in the integrating amplifier.

REFERENCES:
patent: 2975330 (1961-03-01), Bloom et al.
patent: 3109960 (1963-11-01), Bell et al.
patent: 3129389 (1964-04-01), Packard et al.
patent: 3192472 (1965-06-01), Bender et al.
patent: 3382452 (1968-05-01), Rempel et al.
patent: 3390350 (1968-06-01), Davidovits et al.
patent: 3403349 (1968-09-01), Wieder
patent: 3513381 (1970-05-01), Happer, Jr.
patent: 3584292 (1971-06-01), Dehmelt
patent: 3798565 (1974-03-01), Jechart
patent: 3815048 (1974-06-01), Hamlet
patent: 3873884 (1975-03-01), Gabriel
patent: 3903481 (1975-09-01), Jechart
patent: 4043306 (1977-08-01), Barber et al.
patent: 4095142 (1978-06-01), Murayama et al.
patent: 4097853 (1978-06-01), Francis, Jr.
patent: 4314208 (1982-02-01), Munday
patent: 4349798 (1982-09-01), Podell et al.
patent: 4405905 (1983-09-01), Busca et al.
patent: 4434406 (1984-02-01), Fowks
patent: 4446446 (1984-05-01), Fowks
patent: 4462006 (1984-07-01), Fowks
patent: 4476445 (1984-10-01), Riley, Jr.
patent: 4479096 (1984-10-01), Fowks
patent: 4485333 (1984-11-01), Goldberg
patent: 4494085 (1985-01-01), Goldberg
patent: 4495478 (1985-01-01), Kwon et al.
patent: 4574249 (1986-03-01), Williams
patent: 4596029 (1986-06-01), Manueco Santurtun et al.
patent: 4629887 (1986-12-01), Bernier
patent: 4661782 (1987-04-01), Weidmann
patent: 4721890 (1988-01-01), Riley, Jr.
patent: 4899345 (1990-02-01), Cyr et al.
patent: 4947137 (1990-08-01), Busca et al.
patent: 4968908 (1990-11-01), Walls
patent: 5101506 (1992-03-01), Walls
patent: 5172064 (1992-12-01), Walls
patent: 5327105 (1994-07-01), Liberman et al.
patent: 5331854 (1994-07-01), Hulsing, II
Eltsufin, Stern, Fel, "Compact Rectangular-Cylindrical Cavity for Rubidium Frequency Standard," IEEE Forty-Fifth Annual Symposium on Frequency Control, 1991, pp. 567-571.
Busca et al., "Long-term Frequency Stabilization of the Rb.sup.87 Maser," 24 IEEE Transactions on Instrumentation and Measurement 291-296 (Dec. 1975).
Matsuda et al. "Signal Intensity Characteristics of the .sup.87 Rb Double Resonance Due to the Pumping Light", Japanese J. of Appl. Physics, vol. 16, No. 3, Mar. 1977, pp. 391-396.
Kuramochi et al., "Composite-type .sup.87 Rb Optical-Pumping Light Source", Optics Letters, vol. 6, No. 2, Feb., 1981, pp. 73-75.
Mathur et al., "Light Shifts in the Alkali Atoms" Physical Review, vol. 171, No. 1, 5 Jul. 1968, pp. 11-19.
Audoin et al., "Atomic Frequency Standards and Clocks", J. of Physics E. Scientific Instruments, vol. 9, No. 9 (1976.09), pp. 697-720.

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