Accession Number:

ADA172631

Title:

High Performance Crystal Oscillator Development.

Descriptive Note:

Final rept. Aug 79-Feb 84,

Corporate Author:

FREQUENCY ELECTRONICS INC MITCHEL FIELD NY

Personal Author(s):

• Ho, John
• Houari, Yacine

Report Date:

1986-07-01

Pagination or Media Count:

44.0

Abstract:

This contract calls for design, development, fabrication and test of a fast warm-up crystal oscillator operating at 5 MHz and 10 MHz. Test results of earlier model oscillators indicated that further reductions of inner oven and oscillator assembly mass was required. In addition, an approved method of coupling heat into the crystal blank was worked on. In order to reduce mass, redesign of the electronic circuitry from discrete circuits to IC and Hybrid designs was accomplished. Four hybridized circuits were designed, fabricated and tested RF Amplifier Hybrid, Colpitts Oscillator Hybrid, Oven Control Hybrid, Pierce Oscillator Hybrid. Two different oscillators, each with SC-cut crystals were designed, built and tested, using RF Amplifier Hybrids, Colpitts Oscillator Hybrids, and Oven Control Hybrids. Excellent results were achieved in short and long term stability, low power, g sensitivity, as well as reduced volume and weight. The Pierce oscillator was also a hybridized design, containing a 5 MHz, 5th overtone crystal. Preliminary test results were also satisfactory. Author

Descriptors:

• *HYBRID SYSTEMS
• *RADIOFREQUENCY AMPLIFIERS
• *CRYSTAL OSCILLATORS
• COUPLING(INTERACTION)
• LOW POWER
• OSCILLATORS
• ELECTRONICS
• VOLUME
• MODELS
• MASS
• REDUCTION
• DISCRETE DISTRIBUTION
• CIRCUITS
• ASSEMBLY
• HEAT
• OVENS

Subject Categories:

• Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE