Lower power oscillator with heated resonator (S), with dual mode

Details Lower power oscillator with heated resonator (S), with dual mode Lower power oscillator with heated resonator (S), with dual mode

1990-12-20

1991-08-20

Mis, David

Oscillators

With outer casing or housing

With temperature modifier

331158, 310315, 310344, H03B 532

Patent

active

050418009

ABSTRACT:
A resonator heating element is attached to the surface of a crystal resonator. Resonator temperature sensing may be accomplished either by a sensor attached to the crystal enclosure, or through dual mode temperature sensing, or by both. A control system converts the sensed temperature into a series of variable-width pulses applied to the resonator heating element. Thus, the temperature sensing mechanism(s), control system and heating element comprise a temperature feedback control system which allows the crystal to stably operate at or very near its desired temperature. In an especially preferred embodiment, an integrated circuit from a switching power supply may be used in a novel manner to perform certain of the functions in the temperature feedback control loop. Plural resonators may be present in the enclosure, one of which may be directly involved in temperature sensing. In other embodiments, a ring-shaped insulative structure may additionally be disposed between the resonator and its enclosure.

REFERENCES:
patent: 3322981 (1967-05-01), Brenig
patent: 3414794 (1968-12-01), Wood
patent: 3431392 (1969-03-01), Garland et al.
patent: 3463945 (1969-08-01), Fewings
patent: 3553602 (1971-01-01), Brothers et al.
patent: 3561832 (1971-02-01), Karrer et al.
patent: 3715563 (1973-02-01), Bloch
patent: 3826931 (1974-07-01), Hammond
patent: 3882332 (1975-05-01), Frymoyer
patent: 3967143 (1976-06-01), Watanabe et al.
patent: 4039969 (1977-08-01), Martin
patent: 4079280 (1978-03-01), Kusters et al.
patent: 4160183 (1979-07-01), Kusters et al.
patent: 4215308 (1980-07-01), Kusters
patent: 4345221 (1982-06-01), Zumsteg
patent: 4468634 (1984-08-01), Takagi et al.
patent: 4489289 (1984-12-01), Slobodnik et al.
patent: 4537515 (1985-08-01), Dinger et al.
patent: 4701661 (1987-10-01), Warner et al.
patent: 4748367 (1988-05-01), Bloch et al.
patent: 4839613 (1989-06-01), Echols et al.
patent: 4872765 (1989-10-01), Schodowski
Kusters, et al., "Dual Mode Operation of Temperature and Stress Compensated Crystals," Hewlett-Packard, pp. 389-397.
Miguel, "A Temperature Compensated SC Cut Quartz Crystal Oscillator," 1982, 36th Annual Frequency Control Symposium, pp. 576-585.
Holland, "Nonuniformly Heated Aniosotropic Plates: II. Frequency Transients in AT and BT Quartz Plates," 1974, Ultrasonics Symposium Proceedings, IEEE Cat. #74 CHO 896-1SU, pp. 592-598.
EerNisse, "Quartz Resonator Frequency Shifts Arising from Electric Stress," pp. 1-4.
Long, "Quartz Crystals and Oscillators," 1989, presented at the RF Expo '89 Santa Clara, Calif. Feb. 14-16, 1989, Sandia Laboratories, pp. 1-12.
Motorola Technical Data Sheet, "CMOS/NMOS Special Functions Data," 1986, pp. 6-63 to 6-83 (MC145151-1, MC145152-1).

Affiliated with

Also associated with

Rating

Lower power oscillator with heated resonator (S), with dual mode does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lower power oscillator with heated resonator (S), with dual mode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lower power oscillator with heated resonator (S), with dual mode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1010852